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Welcome to J&S Energy
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js energy teamWelcome to J&S Energy
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The smart choice in energy management, battery storage, wind turbines, fast charging stations and solar panels

At J&S Energy we supply complete energy systems, with Powerhub reading and controlling all processes for maximum lifespan and efficiency.

Energy storage agriculture

Energy storage

For agricultural sector

01.

Battery storage farm

J&S Energy offers smart energy storage solutions for agricultural businesses looking to save on energy costs and make their operations more sustainable. Our batteriesβ€”ranging from 100 kWh to 5 MWhβ€”are ideal for storing solar power, reducing peak demand, and increasing their own energy supply. This allows farmers to maximize their solar panels, prepare for grid congestion, and become more independent of the electricity grid. Our solutions are scalable, robust, and low-maintenanceβ€”perfectly tailored to the needs of farming businesses.

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Energy storage industry

Energy storage

For industry

02.

energy storage industry

J&S Energy provides powerful and scalable energy storage solutions for industrial applications and businesses. With batteries ranging from 100 kWh to 5 MWh, we help companies reduce peak loads, save energy costs, and operate more reliably during grid congestion or outages. Our systems are ideal for businesses with solar panels or high energy consumption and support the sustainability and electrification of processes. Whether it's for manufacturing, logistics, or utilities, J&S Energy offers reliable storage solutions that adapt to your business's growth.

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Energy storage houses

Energy storage

For homes

03.

buy home battery affordable and good

J&S Energy offers smart energy storage for households with solar panels. With our home batteries – starting at 5 kWh – you can store solar energy generated during the day and use it yourself in the evening or at night. This lowers your energy bill, increases your independence from the grid, and contributes to a more sustainable home. Our systems are safe, compact, and easy to integrate into existing installations. Ideal for those who want to get the most out of their solar panels – even when the sun isn't shining.

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J&S Energy

J&S Energy...

Your energy, our strength –
expandable, reliable, durable

// Who are we

Quality, knowledge and surprisingly competitive prices

J&S Energy is part of J&S Verduurzaming BV, an experienced Dutch company that has been helping to make homes and business premises more sustainable for many years.

We offer business Huawei batteries and our own brand J&S energy, which we have produced by GSL energy, a major player that has been developing and installing batteries since 2011. Read here a comparison of these two systems, each with their own strengths.

What makes this partnership special is that our manufacturer is actively involved in the installation and commissioning of our battery systems. This guarantees that every system functions optimally from day one. Furthermore, this partner fully supports J&S Energy when it comes to warranty, service, and technical support.

Thanks to our direct production and distribution, we can deliver top quality at a fair price. We offer home batteries for the private market, but also large energy storage for companies  With a realistic payback period based purely on your own consumption – without relying on energy trading or imbalance markets. Clear and transparent with no hidden costs – that's what we stand for! Here is a clear overview of our all-in prices.

J&S home batteries

With us you choose

// Services \\

What can we do for you?

At JS Energy we help you with smart and sustainable energy storage solutions. Whether it concerns home batteries, commercial applications or mobile energy containers for emission-free construction – we think along with you and deliver tailor-made solutions that suit your situation and future plans.

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Energy Scan: Energy Advice for Optimal Savings in 2025/2026

With energy costs rising sharply in recent years, more and more Dutch people are looking for ways to reduce their energy consumption. An energy scan is an effective tool for gaining insight into energy consumption and potential savings within your home or organization. Moreover, an energy scan is the perfect solution for identifying concrete energy-saving opportunities without upfront costs. In this comprehensive guide, we'll discuss the benefits of energy savings in more detail. guide you discover how an energy scan works, what benefits it offers in terms of energy advice and energy savings, and how you can apply for one for your specific situation.

An energy consultant examines a home with a thermal camera, analyzing the building's energy-saving measures and insulation. This snapshot provides insight into energy consumption and potential savings, and helps with making the home more sustainable.

What is an energy scan?

An energy scan is a free analysis of energy consumption in homes and business premises, performed by certified energy consultants. The goal of this scan is to identify energy waste and pinpoint concrete savings opportunities that can be implemented immediately.

The energy scan is conducted via video calls and on-site visits, depending on the specific situation and the provider. During the call or visit, our energy advisor systematically examines all aspects of energy consumption, from heating and insulation to lighting, appliances, and electrical equipment. By identifying both appliances and equipment, savings opportunities are identified and unnecessary energy consumption can be prevented.

The result is a personalized advisory report with concrete savings tips and a cost estimate. This report includes not only recommendations for energy-saving measures but also information about payback periods and potential subsidies. The advice and solutions are tailored to the client's unique situation. The advisor provides practical tips you can implement immediately, as well as advice on larger investments like solar panels or insulation.

A professional energy scan goes beyond simply reviewing energy bills. The consultant analyzes the building's entire energy system, taking into account usage patterns, climatic conditions, and the specific characteristics of the building.

Benefits of an energy scan

Research from 2025 shows that households and businesses can save an average of 10-30% on their energy costs after implementing recommendations from an energy scan. These savings result from a combination of immediate measures and strategic investments.

The service is offered by J&S Energy, energy companies, municipalities, and specialized agencies. These providers invest in energy scans because they contribute to their sustainability goals and customer satisfaction.

Immediately applicable tips for heating, insulation, and lighting are a key component of any energy assessment. Many of these tips cost little or nothing to implement, yet deliver immediate savings. Think of adjusting thermostat settings, sealing gaps, or replacing old lighting.

The energy scan also provides insight into potential subsidies and financing options for energy measures. Advisors are aware of current subsidy programs and can assist with applying for them. The energy scan and the advice provided help identify energy savings and implement sustainable solutions. This can significantly shorten the payback period of investments.

Concrete savings examples and payback periods

Measure Average savings per year Payback period
Smart thermostat € 150 250- 1-2
LED-lighting € 50 100- 6 months
Cavity wall insulation € 300 500- 3-5
HR++ glazing € 200 400- 8-12
Solar panels € 800 1200- 6-8

For private individuals: Energy scan for homes

Vattenfall offers a free energy scan with a customer rating of 9,4, which underscores the quality of their service. This scan is available for all customers and is carried out through a comprehensive consultation in the form of a video call, during which the advisor looks around the entire house and immediately shares practical information about energy savings, investments and subsidies.

The video call lasts approximately 45 minutes and focuses on various aspects of energy consumption. The advisor will examine the insulation of the walls, roof, and floors, evaluate the heating system, and advise on options for solar panels and smart thermostats.

A modern house with solar panels on the roof and energy-efficient features, designed to integrate energy-saving measures to reduce energy costs. This house offers practical tips for sustainability and can serve as a template for a free energy scan.

Registration is easy through My Vattenfall or similar portals for other energy suppliers. After registering, you'll be contacted within a few business days to schedule your appointment. The flexible scheduling makes it easy to find a suitable time.

After completion you will receive within 24 hours an hourly summary per Email with all the points discussed and recommendations. This summary includes not only the recommended measures but also contact details of certified installers and information about available subsidies.

The follow-up service often includes guidance on implementing the proposed measures. Advisors help compare quotes and provide advice on the best approach for your specific situation.

For companies: Business energy scan

Municipal programs like those in Utrecht and Amsterdam offer comprehensive, free energy scans, including a year of guidance for entrepreneurs. Energy scans are relevant not only for businesses but also for other types of organizations, such as social organizations, because they help improve energy consumption and comply with legal requirements within the organization. These programs were created to support local initiatives. to help companies with sustainability and reducing energy costs.

The business energy scan includes a much more comprehensive analysis of commercial buildings, installations, and energy systems than a scan for residential properties. It examines not only basic aspects but also more complex systems such as ventilation, industrial processes, and major energy consumers.

Participation requirements typically include that the business premises are located within the municipal boundaries and that you own or rent the property. Some programs impose additional requirements, such as minimum energy consumption or specific business sectors.

Comparison of municipal programs

Township Workshop Leading Maximum size Waiting time
Utrecht 1 years No limit 2-3 weeks
Amsterdam 6 months < 250 employees 1-2 weeks
Rotterdam 1 years < 100 employees 3-4 weeks
The Hague 9 months SME companies 2 weeks

The business scanning process

Step 1: Registration and intake within 5 working days After registering, you'll be contacted within five business days for a comprehensive intake interview. During this meeting, we'll discuss the specifics of your business and energy consumption to ensure you're optimally prepared for the scan.

Step 2: On-site investigation by Klimaatroute or a similar agency An experienced energy consultant will visit your business premises for a thorough analysis. This visit typically takes 2-4 hours, depending on the size and complexity of the building.

Step 3: Analysis of thermal envelope, heating/cooling, lighting, control and sustainable generation The consultant systematically examines all energy-related systems. Advanced measuring equipment and thermal cameras are used to detect hidden energy leaks.

Step 4: Report with investment advice and payback periods within 2 weeks The comprehensive report includes not only the findings but also a prioritized list of measures with estimated costs and payback periods. This report forms the basis for further decision-making.

Step 5: Guidance in requesting quotations and subsidy applications The consultant helps find suitable suppliers and apply for available subsidies. This guidance can significantly simplify and accelerate the implementation process, making it easier to actually implement the identified solutions in the business premises.

The energy scan process step by step

Good preparation is essential for an effective energy scan. Gather energy bills from the past three years and technical documentation for installations such as central heating boilers, heat pumps, and solar panels. It's recommended to have the energy scan conducted by a professional, especially for renovations or when legal obligations apply. This information helps the advisor identify patterns and make targeted recommendations.

An energy consultant works in a commercial building with measuring equipment, analyzing energy consumption. They offer practical tips and advice on energy-saving measures to reduce energy costs and comply with legal requirements.

During the inspection, the consultant uses advanced equipment such as thermal cameras, light meters, and other measuring instruments. These tools reveal energy leaks that are invisible to the naked eye, such as thermal bridges in insulation or inefficient lighting.

The analysis of user behavior and energy consumption patterns is a crucial part of any thorough energy assessment. The consultant considers not only the technical aspects but also how the building is used and where optimizations can be made in daily operation.

The report prioritizes measures based on return on investment, clearly explaining both costs and savings. The report is written in plain language, so even people without a technical background can understand and implement the recommendations.

Specific examples of aspects examined include thermal imaging of the exterior facade, measurements of light levels in various rooms, and analysis of the heating system. The consultant documents all findings with photos and measurements to provide a complete picture.

Providers of free energy scans in the Netherlands

Energy suppliers like Vattenfall, Eneco, and Essent offer free scans to their customers as part of their customer service. These scans are often easily accessible and can be quickly scheduled through online portals or by phone.

Municipal programs are available in Utrecht, Amsterdam, Rotterdam, and more than 50 other municipalities. These programs often offer more comprehensive support and are specifically aimed at local businesses and residents.

Independent agencies such as Energy-Check, Klimaatroute, and local energy advisors offer specialized services. These agencies often have years of experience and can provide objective advice without any commercial interests tied to specific suppliers.

Overview of conditions per provider

Provider Terms & conditions Duration scan Follow up
Vattenfall To be a customer 45 minutes Email summary
Gemeente Utrecht Company in Utrecht 2-3 hours 1 year of guidance
Energy Check None 1-2 hours Optional
Climate route Business 3-4 hours 6 months

Contact information and registration links for the major providers are available on their websites. Many providers also offer a form where you can schedule an appointment directly or request more information.

Follow-up guidance and monitoring

After the scan, you'll gain access to the EnergyPlanner dashboard, where you'll have 24/7, practical insights into your energy consumption and savings. This gives you immediate insight into the effectiveness of implemented measures and further optimization opportunities.

The dashboard displays an interface with graphs for energy monitoring and savings data, giving users insight into their energy consumption and potential energy-saving measures. It provides an overview of the results of a free energy scan and helps businesses make their buildings more sustainable through practical tips and advice from energy consultants.

Quarterly evaluation meetings with energy consultants are part of many programs. These meetings help adjust measures and identify new energy-saving opportunities.

Guidance in implementing recommended measures can make the difference between a report being shelved and actual energy savings. Consultants can help you find reliable suppliers and compare different options.

Assistance with subsidy applications and comparing contractor quotes is often offered free of charge. This service can result in significant savings by taking advantage of available subsidy programs and obtaining the best prices.

Tips for continuous energy monitoring after the scan include using smart meters, tracking consumption figures, and periodically evaluating energy performance. These habits help maintain achieved savings and identify new opportunities.

Legal obligations and energy labels

Businesses are required to provide information on energy savings from 50.000 kWh per year. This requirement means that businesses must demonstrate the measures they are taking to reduce their energy consumption. An energy scan specifically focuses on the largest consumers of electricity and gas, so that businesses gain insight into ways to reduce their energy consumption. to reduce energy costsAn energy scan can help with this by documenting actions taken and planned.

The energy label C requirement for office buildings will take effect in 2023. Buildings with a lower energy label will no longer be permitted for rent, which has direct consequences for commercial property owners. An energy scan helps identify measures to meet this requirement.

An energy scan plays a crucial role in meeting legal requirements by providing a systematic approach to energy conservation. The report can serve as evidence of compliance and as a guide for necessary improvements.

Prevention of fines and restrictions on business premises are a key driver for conducting an energy scan. By acting proactively, companies can avoid costly sanctions and operational restrictions.

Relevant legislation and regulations

Regulation Implementation date Target audience Penalties
Energy label C 2023 Offices >100mΒ² Rental ban
Information obligation 2023 Companies >50.000 kWh Fine up to €870.000
EU taxonomy 2024 Big companies Reporting obligation

Register for an energy scan

For optimal preparation, a checklist containing energy bills from the past three years, floor plans of the property, and information about usage patterns is helpful. This documentation helps the consultant gain a complete picture and make targeted recommendations.

The step-by-step registration process varies by provider, but usually takes place through their website or by phone. Many providers offer online forms where you can schedule an appointment directly and provide preliminary information.

Expectations regarding turnaround time vary from application to receipt of the report. For individuals, this process typically takes 1-2 weeks, while business scans can take 3-4 weeks due to the more extensive analysis required.

Tips for getting the most out of the energy scan include asking specific questions about your situation, preparing technical documentation, and actively participating during the meeting or visit.

Direct registration links and contact forms

  • Vattenfall: Register via My Vattenfall portal or call 088-0043333
  • Gemeente Utrecht: Energy Desk Utrecht – utrecht.nl/energiescan
  • Energy CheckOnline registration via energy-check.nl
  • Climate routeBusiness energy scans via klimaatroute.nl

Investing time in a free energy scan almost always yields a positive return. With rising energy prices and increasing legal obligations, the question isn't if you'll have an energy scan, but when. Start comparing providers and requesting your free energy scan today to take concrete steps toward lower energy costs and a more sustainable future.

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Building without a grid connection: how to create a completely self-sufficient project

The Dutch electricity grid is jammed. Project developers, contractors, and private individuals are waiting months or even years for a grid connection. Meanwhile, construction projects are stalled, and housing plans are delayed. Building without a grid connection is therefore becoming an increasingly serious consideration – not only for idealistic tiny house residents, but also for regular housing developers and construction sites.

This article provides a step-by-step guide to implementing a project that relies little or nothing on the existing electricity grid. From initial design choices to technical installations, from regulations to practical examples. Everything you need to know to build self-sufficiently at a time when demand for electricity exceeds the maximum capacity of the power grid.

A modern tiny house nestled in a verdant Dutch landscape, equipped with solar panels on the roof that generate solar energy. This house is completely self-sufficient and offers a sustainable way of living, independent of the existing electricity grid.

What exactly does building without a grid connection mean?

Before diving into the technical details, it's important to understand what "building off-grid" actually means. There are different levels and applications.

Temporary phase versus permanent phase

When building without a grid connection, a distinction can be made between two situations:

Temporary phase (construction site)

  • The chain park, cranes, lighting and electrical equipment run entirely on their own energy
  • No connection to the existing grid connection of the grid operators
  • Particularly relevant for infrastructure projects where no grid is available

Permanent phase (delivery)

  • After completion, the home or building functions completely or largely off-grid
  • Generating, storing and consuming energy takes place locally
  • No or minimal dependence on the electricity grid

Fully off-grid versus partially independent

There are gradations within grid-independent construction:

  • Completely off-gridNo electricity, gas, sewer, or water connections. You are completely self-sufficient for all utilities.
  • Partly independent: administratively, you still have a small grid connection as a backup, but in practice you largely run on your own generation and storage.

In the Netherlands, most projects choose the latter option. The grid then acts as a safety net for peak demand or winter periods, while in practice, you're dependent on your own energy system for a longer period than on grid power.

Concrete examples in the Netherlands

  • Tiny house projects in Drenthe and Friesland that have been running entirely off-grid since 2021
  • Construction sites along highways and railways where no grid capacity is available
  • Holiday homes in nature reserves where connection is too expensive or impossible
  • Experimental housing projects with permission from municipalities to fully to live self-sufficiently

Reasons to build without a grid connection

Why would you choose the added complexity of off-grid or grid-independent construction? The reasons are diverse and often practical.

Practical and financial motives

  • Avoid waiting timesNew connections for large consumers can take months to more than a year. Projects in regions with severe grid congestionβ€”think Almere, Haarlemmermeer, parts of Utrecht, and Gelderlandβ€”are stalled as a result.
  • Avoid high connection costs: the costs for grid reinforcement, new cables and transformer houses can amount to tens of thousands of euros per project.
  • Save on fixed charges: no connection means no fixed monthly costs for electricity and gas.
  • Independence from energy prices: you are less vulnerable to fluctuations in the energy market.

Sustainability considerations

  • Locally generated energy with solar panels means less transport losses
  • Emission-free construction sites without diesel generators reduce nitrogen and particulate matter emissions
  • Conscious consumption reduces the ecological footprint
  • Contributing to the energy transition by reducing pressure on the overloaded grid

Flexibility and independence

  • For temporary projects or relocatable homes (tiny houses) you can be on location quickly
  • No dependency on grid operators for planning and implementation
  • Certainty about your energy supply, even in the event of grid problems elsewhere

Note: high initial investment

Building off-grid isn't automatically cheaper. The investment in solar panels, batteries, inverters, and control systems can quickly run into tens of thousands of euros. However, you do gain independence and predictable long-term costs.

Design choices: fully off-grid or hybrid solution?

The first crucial design decision: do you opt for a completely off-grid build or a hybrid structure with a limited grid connection?

Completely off-grid

Completely off-grid is suitable for:

  • Remote locations without a transformer house nearby
  • Tiny houses and holiday homes with limited consumption
  • Projects where a conscious choice is made for maximum self-sufficiency

This requires:

  • Large PV capacity (more panels than in regular situations)
  • Large battery storage to bridge days without sun
  • Alternative heat sources such as a wood stove or pellet stove
  • Smart energy management to spread peaks

Hybrid solution (partially grid-independent)

With a hybrid approach, you remain administratively connected, but in practice you largely operate on your own generation and storage:

  • The grid acts as a backup during winter periods or unexpected peaks
  • Interesting for regular single-family homes and apartment complexes
  • Provides security without being completely dependent on the power grid
  • Enables the return of excess capacity

Practical rules of thumb

  • A standard Dutch household consumes approximately 2.300-2.500 kWh electricity per year
  • Gas-free homes with heat pumps and induction can generate up to 5.000-6.000 kWh/year
  • In winter months, 4-5 times as much PV surface is needed to cover the same demand off-grid
  • South-facing orientation and a slope angle of 30-40 degrees optimize yield

Technical basis: energy generation without grid connection

The main reason off-grid living is technically feasible is the development of solar energy and storage technology. Here's an overview of the most important sources.

Solar panels as main source

Solar panels are the backbone of any off-grid system:

  • For a standard home, 10-20 panels are common (3-7 kWp)
  • On construction sites you often see larger field setups with 50-60 panels
  • A 400 Wp panel produces an average of 350-400 kWh per year in the Netherlands
  • Optimal orientation (south) and angle of inclination enhance winter yield

A large solar panel installation is located on an open construction site, where sustainable energy is generated. These solar panels are intended to create a fully self-sufficient energy system, reducing dependence on the existing electricity grid.

Small wind turbines as a supplement

Wind can provide energy in autumn and winter when sun is scarce:

  • Systems from 1-5 kW provide additional energy
  • Particularly effective in open, windy locations
  • Restrictions on permits, noise and visual impact
  • Often less profitable in densely built-up areas

Emergency generator for exceptional situations

A generator acts as a last resort:

  • Use on several dark winter days in a row
  • Conventional diesel generators have environmental and noise disadvantages
  • Modern alternatives:

    • HVO (biodiesel) powered aggregates with lower emissions
    • Hydrogen fuel cells for emission-free backup

  • A clean backup is essential for emission-free construction ambitions

Energy storage: batteries as the heart of the system

No off-grid without storage. You need power even when the sun isn't shining, and batteries are essential for that.

Typical storage capacity

The required capacity depends on your situation:

Type of project Typical capacity
Tiny house 10-20kWh
Average residential house 20-40kWh
Construction site/shack park 200-300 kWh or more

A few solar panels and a home battery aren't enough to power a complete house. For serious off-grid living, you'll need to consider significant sizing.

Technology

The most commonly used technologies:

  • Lithium-ion: most common, good energy density
  • LFP (lithium iron phosphate): longer life (more cycles), better safety, less fire hazard, but slightly lower energy density

The lifespan of batteries is typically 10-15 years, depending on usage and quality.

Smart control

A good energy system requires intelligent control:

  • Automatic switching between solar power, battery and any backup
  • Flatten peaks so that heavy consumers (taps, heat pumps, charging stations for electric cars) do not draw everything from the battery at the same time
  • Prioritizing essential consumers
  • Prevent peak loads by spreading consumption over the day

Electric cars as storage?

In the long term, electric cars can be connected via vehicle-to-home (V2H) provide extra storageFor now, they're mainly additional consumers that burden the system. This must be taken into account when designing off-grid systems.

Heat and hot water without gas network

Off-grid living also means no gas connection. How do you manage heating, hot water, and cooking?

Space heating

The biggest challenge in Dutch winters:

Heat pump

  • Sustainable choice, but high power consumption in winter
  • Requires sufficient battery capacity and PV surplus capacity
  • Low-temperature heating (underfloor heating) is more efficient

Alternatives

  • Wood or pellet stove: effective, but pay attention to particulate matter and wood supply
  • Combine with extra insulation to minimize heat demand
  • Sun-oriented orientation of the house for passive heat gain

Hot tap water

  • Solar boiler with collectors: widely used off-grid solution, captures direct heat from the sun
  • Electric boiler: powered by PV and battery, but requires a lot of energy
  • Combination of both for optimal coverage throughout the year

Cooking

  • Induction hob is efficient but requires relatively much power
  • Fine-tune the battery system to avoid peaks
  • In extreme off-grid situations: cooking on a wood or pellet stove

Water, sewerage and other facilities off-grid

Off-grid living goes beyond just electricity. Other amenities also require a different way of thinking.

Drinking water

  • Local source (well) with purification plant
  • Rainwater harvesting for toilet, washing machine and cleaning
  • Strict Dutch quality standards apply to drinking water
  • Filtration and UV treatment for safe drinking water

Sewerage and wastewater

  • IBA (Individual Wastewater Treatment): recognized solution for non-connected locations
  • Helophyte filternatural purification via reed fields
  • Septic tank: traditional but less sustainable
  • Composting toilets as an alternative in very small projects

Internet connection and telephony

  • Mobile connection via 4G/5G as an alternative to fixed lines
  • Suitable antenna solutions for remote locations
  • Satellite internet as a last resort (higher costs, variable reliability)

Regulations: what is and is not allowed in the Netherlands?

Building completely off-grid is not prohibited in the Netherlands, but you must remain within the framework of laws and regulations.

Important rules and regulations

  • Building Decree/Bbl: sets requirements for safety, health, usability and energy
  • Gas connection: not mandatory for small consumption since July 1, 2018
  • Electricity connection: not legally required, but installation must comply with NEN 1010
  • Environmental permit: municipalities can impose additional requirements

Practical considerations for developers

  • To terminate an existing grid connection, the meter must be removed and the connection administratively terminated.
  • Municipalities can impose requirements on fire safety, environmental impact and health
  • Storing large battery packs requires attention to fire safety and distance from buildings
  • Some zoning plans may prescribe connection to certain facilities

Experiment room

There are examples of municipalities that offer room for experimentation:

  • Temporary off-grid tiny house projects with municipal permission
  • Emission-free construction sites as a requirement for tenders from 2025-2030
  • Pilot projects for "network-conscious construction" in Utrecht and Gelderland with approximately 6.500 homes

Sustainability: benefits and pitfalls of grid-independent construction

Off-grid building is often presented as sustainable, but the reality is more nuanced.

Positive impact

  • Lower COβ‚‚ emissions: locally generated solar energy without transport losses
  • Lower grid load: you relieve the overcrowded electricity network
  • Emission-free construction sites: no diesel generators means less nitrogen and particulate matter
  • Conscious consumption: Off-grid living makes people more aware of every kWh of energy they consume

pitfalls

  • Conventional diesel generators as backup undermine sustainability
  • Intensive wood burning can lead to air quality problems
  • Battery production and recycling has its own environmental impact
  • Winter periods sometimes require fossil backup

Energy neutral versus off-grid

Aspect Energy neutral Off grid
Connection Yes, with return delivery No or minimal
Annual balance sheet Generation = consumption Not necessarily in balance
Assured Just like backup Own storage as backup
Generator Not required Sometimes it is necessary

An off-grid home is not automatically energy neutral, and vice versa.

Practical examples of building without a grid connection

Theory is nice, but how does it work in practice? Three Dutch examples.

A small wooden house, surrounded by woods, is equipped with solar panels that generate renewable energy. This completely self-sufficient house is ideal for off-grid living and offers a low carbon footprint that contributes to a sustainable lifestyle.

Example 1: Harderwijk Pilot Tiny Houses

Since 2019, a pilot project has been running in Harderwijk with three tiny houses where residents must be completely self-sufficient.

  • Goal: investigating whether off-grid living can be practical and comfortable
  • Energy sources: solar panels, battery storage, alternative heat sources
  • Lessons:

    • Residents are becoming much more aware of their consumption
    • Initial investment is high
    • Amenities are more basic than in traditional homes
    • Off-grid makes people more creative in energy use

Example 2: Carolien's Tiny House in Brabant

Carolien has been living completely off-grid in her self-built tiny house for about six years now.

  • Goal: conscious and sustainable living without dependence on utility companies
  • Method: second-hand materials, truck trailer as a basis
  • Energy systemPV panels with battery storage
  • Lessons:

    • Economical consumption is essential
    • Concessions in comfort during extreme periods
    • Maintaining your own system requires knowledge and time

Example 3: Off-grid projects in Drenthe

In Drenthe there are several tiny house projects on farms and recreation parks where off-grid options are becoming offered.

  • Goalflexible and sustainable living in rural areas
  • Features: small-scale capacity choices, limited facilities
  • Lessons:

    • Recreational and seasonal use works well
    • Full occupancy requires more investment
    • Local authorities are often willing to provide input

Financial feasibility and business case

Is building off-grid financially sound? The answer depends on your situation.

When it makes sense

  • If grid connection is impossible or very expensive
  • For temporary projects where connection costs do not outweigh the benefits
  • When grid congestion delays cost more than an off-grid solution
  • For small projects (tiny houses, holiday homes) with low consumption

Cost items to take into account

  • Investment: solar panels, batteries, inverters, control technology
  • Optional: wind turbine, generator, water purification, IBA
  • Maintenance: replace batteries after 10-15 years, inverters after 10-12 years
  • Potential savingsconnection costs, grid reinforcement, fixed charges

Order of magnitude of investments

  • Off-grid system for tiny house: several thousand to ten thousand euros
  • Completely off-grid home: tens of thousands of euros
  • Mobile battery systems for construction sites: rental or purchase structures with comparable amounts

Seasonal versus year-round

Off-grid tiny houses or holiday homes with lower and seasonal consumption are financially easier to realise than regular family homes that require heat and electricity all year round.

Design and lifestyle choices for comfortable off-grid living

Technology alone isn't enough. Comfort also depends on how you design and how you live.

Design choices that make the difference

  • Excellent insulation: minimize heat demand through sealing and high Rc values
  • Orientation to the sun: large south-facing windows for passive heat gain
  • Energy-efficient appliances: choose A-labels and devices with low standby consumption
  • Compact living space: living smaller means less energy needed
  • Smart layout: place heat sources centrally for efficient distribution

Lifestyle choices for off-grid residents

  • Spread consumption: washing and cooking when the sun is shining
  • Avoid peak consumption: do not use all heavy equipment at the same time
  • Accepting concessions: light restrictions during extremely dark winter days
  • Monitor and adjust: regularly check your consumption and adjust your behavior

The awareness that comes with off-grid living often leads to lower consumption, allowing the system to be sized smaller and cheaper.

Summary and next steps for your project

Off-grid construction is no longer just for idealists or adventurers. Due to grid congestion and sustainability goals, it's becoming a serious option for a growing number of projects. The combination of energy sources such as solar panels, battery energy storage, alternative heating systems, and smart control systems makes it technically feasible to build completely or largely off-grid in the Netherlands.

However, it does require careful consideration. The financial investment is higher than with traditional grid-connected construction, and the perceived comfort level depends heavily on the design and user behavior. But for projects that would otherwise have to wait for years for the overloaded power grid, off-grid construction offers a concrete solution.

Next steps for your project

  • Start early: make choices about the degree of grid independence during the design process
  • Work with specialists: find consultants with experience in energy storage and off-grid installations
  • Check local rules: ask the municipality and grid operator which regulations and restrictions apply
  • Dimension spaciously: take winter periods and unexpected consumption into account
  • Think hybrid: consider a minimum grid connection as a safety net for maximum security

Want to get started? Start with a feasibility analysis for your location and consumption profile. With the right preparation, a self-sufficient project isn't a utopia, but a realistic ambition.

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Our technology partner

Our Technology Partner in Energy Storage

At J&S Energy we work together with a strategic high-tech partner which has been active in the development and production of advanced energy storage systems and solar energy systems since 2010. Thanks to this collaboration, we combine European market knowledge with years of technical expertise in the field of lithium energy storage.

Our partner has modern production facilities with several fully automated production lines and an annual production capacity of no less than 5,8GWhThis scale enables fast delivery, even for large projects, without compromising quality or reliability.

Focus on innovation and quality

With more than 200 specialized employees, including 25 engineers in the research & development department, we are constantly working on new solutions for lithium iron phosphate (LiFePOβ‚„) batteries. This close collaboration allows us OEM and custom solutions offerings that are fully tailored to the specific wishes of our customers in the Netherlands and Belgium.

Our partner is certified to all leading international standards, including IEC 0-21, UL-1973, UL-9540A, IEC62133, IEC62219, CE, UN38.3, MSDS. Each system is thoroughly tested to meet the highest standards of safety, reliability and durability.

Jointly responsible for quality and warranty

What makes our collaboration unique is that we, together with our producer, fully support the product.
Not only do we share the same quality standards, we also go jointly the guarantee towards our customers. This means that both we and our technology partner are responsible for the sustainability, performance and service of each supplied system.
In this way we offer our customers maximum security – both technically and organizationally.

Advanced systems for demanding applications

The latest generation liquid-cooled energy storage systems from our partner offers exceptional performance for industrial and commercial applications.
Some of the features are:

  • Precise thermal control thanks to integrated liquid cooling and air conditioning;
  • High-quality 314Ah LiFePOβ‚„ cells with more than 12.000 cycles expats must register with the local municipality and obtain a depth of discharge up to 89% (DOD);
  • Intelligent control via integrated BMS and EMS systems;
  • Modular and scalable architecture for various capacity and power levels;
  • Full international certification - IEC 0-21, UL-1973, UL-9540A, IEC62133, IEC62219, CE, UN38.3, MSDS.

Versatile and future-oriented

Our joint solutions are used worldwide in:

  • Combinations of solar energy with storage
  • Peak shaving and energy cost optimization
  • Industrial installations, data centers and construction sites
  • Emergency power and grid stabilization projects
  • Companies that strive for COβ‚‚ reduction, ESG targets and energy independence

This partnership allows us to provide our customers with innovative, safe and affordable energy storage solutions, developed according to the strictest quality standards and suitable for tomorrow's energy demands.

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// a selection from our range

Storage systems for every situation

// Why J&S Energy \\

Choosing quality and craftsmanship

Home battery icon

01

Go for certainty

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You get a 10-year warranty on both product and performance. Thanks to a lifespan of up to 6.500 or even 11.000 charging cycles for our business larger battery storage You're investing in quality and long-term reliability. Our competitive all-inclusive prices make that even more attractive.

Connecting a home battery to solar panels

02

Payback period

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Payback within 4 to 5 years – based purely on your own consumption. Thanks to our competitive all-inclusive prices, we make this profitable investment accessible to everyone. Private individuals can consider a home battery but our business customers with systems up to 100MWh capacity

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03

Service and monitoring

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Fast service and technical support,
via our J&S Energy app Everything in real time – from energy consumption to storage status. This way, you're always in control, wherever you are. We actively monitor your situation and can respond before you even notice.

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04

Tailor-made solutions

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Every situation is different – ​​that's why we think along with you. Whether it concerns a house that is heated entirely electrically, farm with solar panels or commercial building without panelsWe provide energy storage that perfectly matches your needs and consumption. Personalized advice, without any fuss.

// Prices

Transparent all-in prices

// J&S Energy

Frequently Asked Questions

Yes. All JS batteries Energy earns itself back through increased own consumption – even without having to trade on the energy market or imbalance markets.

πŸ“Š Calculation example:

  • 10 kWh battery: investment €5.227 (including installation and inverter)

  • Annual savings: €950 (based on 2.700 kWh extra self-consumption)

  • Payback period: 5,5 years

  • Lifespan: average 6.600 cycles β†’ Β±15 years

➑️ After the payback period you still have Β±9 years of β€œfree electricity”.

A 10 kWh home battery significantly increases your solar self-consumption, reducing the amount of electricity you need to purchase from the grid. You can save even more, especially with a dynamic energy contract. smart charging and discharge.

πŸ“Š Calculation example:

  • You consume 4.500 kWh annually

  • Your solar panels generate 4.500 kWh

  • Without a battery you use 30% yourself β†’ 1.350 kWh

  • With battery you use 80% yourself β†’ 3.600 kWh

  • You pay €0,35 per kWh when purchasing

Savings:
(3.600 – 1.350) kWh = 2.250 kWh extra self-consumption
2.250 kWh Γ— €0,35 = €787,50 savings per year

➑️ In combination with dynamic prices this can still amount to €1.200 per year.

Create a home battery stores excess energy from your solar panels so you can use it later β€” for example, in the evening or when it's cloudy. consume more of your own power and save on grid costs.

Solar panels generate electricity during the day. Any unused power is stored in the battery. If you need it later, it's supplied from the battery. Dynamic pricing allows the battery to automatically charge when prices are low and discharge when prices are high.

We offer systems from 5 kWh to 5 MWh β€” from household to industrial scale.

Our batteries can handle 6500 to 11.000 charge cycles, which means a lifespan of approximately 15–30 years, depending on usage.

Installation starts at around €3500 for a 5 kWh system, increasing depending on capacity and additional options such as emergency power and dynamic control.

Yes – our MWh systems are ideal for peak shaving, deployment on construction sites or during events and can operate emission-free.

Absolutely! We supply mobile energy containers suitable for applications such as emission-free construction or temporary power supply.

All our systems are modular. You can easily start with a smaller capacity and scale up later.

Not standard, but possible with a backup inverter and automatic switching system for power in the event of a mains failure.

Manufactured with high-quality safety technology, including overload and temperature protection, galvanic isolation, self-extinguishing housing and VDE/LFP certification.

Our certified technicians handle the complete installation, including inverter, power module, battery modules, and – if desired – emergency power switching. They also assess suitable indoor or outdoor placement.

You can view real-time consumption via our accompanying J&S Energy app, storage and status monitors and settings to adjust.

kWh = total amount of stored energy; kW = charging/discharging rate. Both are important for your system's performance.

Yes, our home batteries/energy storage systems all have a positive payback period of 4 to 5 years. This payback period is based purely on our own consumption – NOT on uncertain trading on energy markets or imbalance markets!

Yes. It's possible, but we're not dependent on it in terms of payback time! With a smart battery, you can charge at low prices and discharge at peak prices via the EPEX (day-ahead) market. This requires a dynamic contract and EMS.

Individuals: VAT refunds are possible if you are considered an entrepreneur. Businesses: Energy Investment Deduction (EIA) may be eligible. Local subsidies vary by municipality.

Our batteries are all made of Lithium Iron Phosphate (LFP, safe).

Technically possible, but we strongly recommend having a certified specialist install it for safety and warranty reasons.

Some models have IP ratings (such as IP55 or IP66), but full outdoor placement requires shelter and temperature management.

In the Netherlands, installation costs usually vary from a few hundred to thousands of euros extra, depending on adjustments in the meter box or wiring.

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