Frequently Asked Questions

For companies that want to get more return from their sustainable assets.

Whether you want to increase revenue generated by your battery, optimize your solar and/or wind assets or a combination of this, Eddy Grid can help you to achieve this.

We have a wide variety of products and can serve various types of companies.

We help our customers to get the best return on investment on their renewable assets through various services.

You can find a full overview of our services here

The various energy markets – Day Ahead, Intraday, and Imbalance – work closely together and continuously influence one another.

On the Day Ahead market, bids are placed 'blind': bids are submitted in advance without knowledge of the final market price. This means we must make assumptions about expected prices across all markets. An important constraint is that once capacity is committed on the Day Ahead market, it is no longer available for sale on the Intraday or Imbalance market. We have an obligation to fulfil our nominations.

The Intraday market, by contrast, is a continuous market in which positions can be adjusted throughout the day based on new information and current price developments.

Supply and demand of energy are not always in balance. When that balance is disrupted, it affects the price on the Imbalance market. Imbalance prices are determined per quarter-hour and can fluctuate significantly — ranging from negative to sharp spikes upward. Our algorithm continuously calculates whether it is more advantageous to fulfil our nominations, or to deliberately deviate from them in order to benefit from favourable imbalance prices.

Forecasts of consumption and production are never 100% accurate, which can lead to imbalance costs. The ex-post market is a trading mechanism following delivery, which allows us to adjust our energy positions to correct imbalances and reduce associated costs. Eddy Grid manages not just a single asset, but an entire portfolio of assets. This offers a significant advantage: by spreading positions across multiple assets, we can offset imbalance risks against one another, resulting in a portfolio benefit. Where one asset has a shortfall, another can absorb the surplus. As a result, we need to make fewer costly corrections on the imbalance market, which lowers the total costs for the portfolio. Individual assets benefit from the scale and stability of the portfolio as a whole — an advantage that a standalone asset does not have.

New Developments:

We are currently busy testing on the aFRR market and further refining our trading strategy. Once testing is complete, we will make this functionality available to more customers in a phased rollout.

We closely monitor relevant market developments and continuously work on new initiatives to keep delivering maximum value, even in changing and challenging market conditions.

Imbalance on the energy grid refers to the difference between the amount of electricity generated at a given moment and the amount consumed at that same moment. Because electricity is difficult to store on a large scale, the electricity grid must be in balance at all times: supply and demand must be exactly the same, second after second.

TenneT and other grid operators pay for flexibility. That is to say: the ability to quickly switch on or off. This is done on the imbalance market.

The imbalance market is managed by the grid operator (such as TenneT in the Netherlands). This market is used to make quick corrections when there is an imbalance between generation and consumption on the grid. Market parties can benefit financially from this by offering their flexibility.

With Eddy Grid you can use your assets to gain returns from this imbalance market.

More info can be found here

The business cases that Eddy Grid shares during the sales process are based on a backcast: we calculate what revenues would have been generated if our algorithm had already been active on your assets over the past year, using the actual market prices from that period. In doing so, we look specifically at your consumption patterns and generation data — over the course of a full year, we analyse every 15 minutes how much capacity is available on your connection to help balance the electricity grid. By supporting the grid at the right moments, a compensation can be received from the grid operator for doing so. The costs and revenues in the business case are independent of the existing costs and revenues at your site.

Important to note: a backcast is explicitly not a prediction of future revenues. Energy markets are dynamic and conditions can vary significantly from year to year, meaning actual revenues may differ from what the business case shows.

The various energy markets – Day Ahead, Intraday, and Imbalance – work closely together and continuously influence one another.

On the Day Ahead market, bids are placed 'blind': bids are submitted in advance without knowledge of the final market price. This means we must make assumptions about expected prices across all markets. An important constraint is that once capacity is committed on the Day Ahead market, it is no longer available for sale on the Intraday or Imbalance market. We have an obligation to fulfil our nominations.

The Intraday market, by contrast, is a continuous market in which positions can be adjusted throughout the day based on new information and current price developments. Supply and demand of energy are not always in balance. When that balance is disrupted, it affects the price on the Imbalance market. Imbalance prices are determined per quarter-hour and can fluctuate significantly — ranging from negative to sharp spikes upward.

Our algorithm continuously calculates whether it is more advantageous to fulfil our nominations, or to deliberately deviate from them in order to benefit from favourable imbalance prices. It makes a constant strategic trade-off between certainty and flexibility. Because prices are not known in advance, we estimate the expected price level and volatility for each market — and respond dynamically.

Why do we charge on the intraday market?

An example of the battery strategy during passive imbalance — before and after a peak moment.

It sometimes occurs that following an imbalance price spike, we actively purchase on the intraday market — rather than waiting for a cheaper imbalance moment. This may not seem intuitive at first, but it is often the most profitable choice. Below we explain why.

The situation step by step:

Suppose the imbalance price rises sharply to between €150 and €250 per MWh. At that point, the battery discharges fully — from 50% down to 12% state of charge — and we sell energy at a high price. This generates a revenue of approximately €1,850.

After the peak, the imbalance price drops significantly, to €50–€60 per MWh. At that same moment, the intraday purchase price is €70–€80 per MWh — higher than the imbalance price. Nevertheless, we deliberately choose to purchase on the intraday market and recharge the battery back to 50%. The cost of doing so is approximately €290.

This results in a net revenue of +€1,560 for this cycle — and the battery is ready again for the next peak.

Why not wait for a cheaper imbalance moment?

Because we must fulfil our nominations and the imbalance market is unpredictable. By actively purchasing on the intraday market, we restore our position in a controlled manner — ensuring we are ready when the next opportunity arises.

The logic at a glance

This depends on the purchased products and complexity. If the required hardware and connections are already present, it can be arranged in a matter of days!

We have no influence on the installation times of third parties.

Grid congestion means that the electricity grid doesn’t have enough capacity at certain times to handle all the demand or supply. This happens because electricity demand is increasing, due to things like industrial electrification and the rapid growth of renewables like solar and wind. As a result, there are peak moments when the grid is “full”. Grid congestion makes it harder to get new or larger connections and requires innovative solutions and flexibility from businesses.

We are extremely good at responding to current market conditions. Over the longer term, the energy market is influenced by macro conditions such as the gas price, new products and markets, as well as expansions of the TSO/DSO network. This makes it very difficult to provide a longer-term forecast.

Several factors can contribute to a lower number of transactions, particularly in winter:

• Limited price volatility – The market moves less, resulting in fewer trading opportunities.
• Greater share of Control State 2 – In control state 2, the grid operator determines who is permitted to produce or consume, meaning we cannot act on price differences to generate profit. This affects the available trading opportunities.
• Changes in imbalance and aFRR products – Modifications to these products influence market dynamics.
• Connection to the PICASSO platform – The integration of the Netherlands into this European platform has contributed to reduced price fluctuations.

Does this mean the algorithm is performing less well?
No. Fewer transactions are not an indication that Eddy Grid's algorithm is functioning less effectively. Returns are highly dependent on market conditions — in periods of low volatility, the available trading opportunities are simply more limited.

A group transport agreement allows multiple companies to share transport capacity on the same medium-voltage ring or, in the future, on the same substation. As a group, you can use available capacity more efficiently and individually reach a higher peak, as long as the total group capacity is not exceeded. This encourages cooperation and can bring financial benefits.

This relates to how the system deploys your battery as efficiently and intelligently as possible. The system deliberately maintains a buffer, so that the battery can still respond to favourable energy prices later in the day.

We trade energy on, among other markets, the imbalance market — an energy market where supply and demand of electricity fluctuate constantly. By maintaining a buffer, the system can respond quickly when prices are favourable — both to discharge at high prices and to charge when that is advantageous. Fully depleting the battery is therefore financially less attractive in such cases.
In summary, the system does not discharge the battery further because, based on its calculations, that is simply not the best decision at that moment.

This may sound counterintuitive, but it is often a deliberate and profitable choice within the strategy. The system does not simply look at whether a price is positive or negative — it looks at relative value: is the current price high enough compared to other moments in the day? If so, it can actually be advantageous to discharge now, even if the price is 'just' positive.

In addition, the system trades on multiple markets, including the day-ahead, intraday, and imbalance markets. The system optimises for the total financial result across all of these markets. Discharging at a positive price can free up capacity to charge more cheaply later, or to provide flexibility at moments with higher prices. The battery may also be discharged to offset your own consumption.

Because Eddy Grid trades on multiple markets simultaneously, the prices achieved are not always equal to the prices visible on real-time dashboards from third parties, such as those of the ANWB.

Import is primarily limited due to kW Max costs. These are the costs you pay based on the highest power demand you draw in a given month. By limiting import, we prevent you from causing unnecessarily high peaks and incurring additional costs as a result. Eddy Grid recalculates this limit on a monthly basis, ensuring the strategy always aligns with your current situation.
What is the effect? When you are close to your import limit, the system will automatically intervene to prevent it from being exceeded. This may mean that charging of your battery is restricted, or that other assets such as solar panels are curtailed.

How does this impact your revenues?
Although a limited import reduces the flexibility of the system, we expect the net result to be more favourable overall. By avoiding high power peaks, your kW Max costs decrease — and in most cases, this outweighs any potentially missed trading revenues.

A concrete example
Suppose you have a 1 MW battery and import is limited to 20%. At this setting, you save nearly €3,000 in kW Max costs per month — roughly what a 1 MW / 2 MWh battery would have earned in February on the day-ahead market altogether.
On top of that, a limited import affects the day-ahead spread. At 20% import, you need five times as many low-price moments as high-price ones, which significantly reduces the effective spread. The cost savings therefore clearly outweigh this.

Our strategy is focused on maximising the net result across all markets. While market dynamics may sometimes appear to offer attractive short-term opportunities, our approach consistently outperforms on the total net result.

There are a number of good reasons why your battery does not always charge using available solar energy. The algorithm makes a smart assessment based on multiple factors. In summary:

• Trading and optimisation strategy: it may be financially more advantageous to charge the battery later, for example when energy prices are more favourable. Transport costs and contractual terms also play a role here.
• Battery cycle limit: if your battery has a maximum number of charge cycles, the system sometimes reserves capacity for more valuable moments later in the day.

In summary: 'free' solar energy is never entirely free from the system's perspective — the expected future value of the battery capacity always plays a significant role.

Eddy Grid manages all assets at your site — such as solar panels (PV), wind, and a battery — as a single whole via the orchestrator. It continuously monitors all controllable capacities, your contracted import and export capacity, and current market prices, selecting at every moment the combination that delivers the best financial result within your contractual limits.

For example, the orchestrator may choose to temporarily curtail PV output when export capacity is full, allowing the battery to use that capacity to discharge at more favourable imbalance or intraday prices. In this way, your grid connection is utilised as efficiently as possible across all assets.

At the same time, asset-specific settings are applied, tailored to your contract, the battery's C-rate and cycle limits, and transport and energy costs. This allows the battery to follow its own trading strategy, while always operating in coordination with the other assets via the orchestrator.

The goal is always to achieve the highest net result for the entire site — across the day-ahead, intraday, and imbalance markets — without unnecessarily exceeding your transport rights or cycle limits.

In some cases, imbalance costs from different customers can be offset against each other. This benefit is called portfolio advantage. 75% of it goes to the customer.

Generally the invoices are sent on the 25th of every month.

1. Ex-Post Trading:
   The costs and benefits from ex-post trades are distributed proportionally among participating customers based on their contribution to the portfolio imbalance direction. Each customer receives both their share of trading costs and the benefit of an improved imbalance position. Customers can be excluded from ex-post participation if there are issues with their measurements or by their own choice.

2. Portfolio Advantage:
   When customer imbalances naturally offset each other (one imports while another exports), the net portfolio imbalance is smaller than the sum of individual imbalances. This reduces total settlement costs. We calculate what each customer would pay individually versus the actual portfolio cost (after ex-post), and distribute the savings proportionally based on each customer’s contribution and direction.

By increasing the return on sustainable assets, Eddy Grid contributes to making the energy transition affordable.
We do this by using smart algorithms to control the assets and trade on the various energy markets and respond to the passive imbalance market.

We would love that. Our address is on our website.