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EDF Renewables Deutschland

Questions and answers

Battery storage

The battery

What can the EDF Renewables’ battery system do for my site?

Our energy storage system reduces annual electricity costs produced by short-term high loads. The system will give you the flexibility to manage your load and cap the peaks from your annual consumption. Thanks to the battery, production at your site can be increased and optimised without overloading the grid.

What is a battery storage used for?

A battery stores energy. When high electricity loads are produced at your site in the short term - and therefore expensive - the battery uses the stored energy and thus reduces the annual electricity costs.

Does the charging of the battery increase the consumption of the site?

Battery use only minimally increases the site's power consumption. The operation of the battery storage leads to losses, the size of which depends on the system configuration and is vanishingly small compared to the total consumption. For a storage system of 1MW capacity, we expect annual losses to be less than 10 MWh. In addition, algorithms have been developed for the battery that prevent battery charging from causing new load peaks. The algorithms are based on the consumption profile of previous years and are updated in real time.

How much experience has EDF Renewables in battery storage?

We have over 10 years of experience – with already more than 100 MW of installed batteries all around the world. Find out about it here!


What is peak-shaving?

Peak-shaving is the name used for the mitigation of peak electricity consumption by a battery system.

Why implement peak-shaving?

As network costs represent a significant part of the electricity bill - in addition to the normal costs of electricity distribution - it is obvious that when your electricity consumption reaches significant peaks, your electricity bill will also increase.

Peak shaving can therefore be an interesting way to reduce your electricity costs.

How does peak-shaving work?

In addition to normal electricity distribution costs, network charges account for a significant portion of the electricity bill. This network usage charge is made up of a performance charge and a labor charge.

To determine the performance charge, the average value of the purchased power in a 15-minute period is measured. In a calendar year, the highest value of these 15-minute power values is the one retained for billing. It is multiplied by the network operator's power charge for the corresponding voltage level.

Therefore, capping this peak load reduces the annual peak values relevant to billing. The algorithms of the energy management system (EMS) shift power consumption to off-peak times with the help of the battery, thus reducing the grid usage charge by up to 80%.

Which are the grid fees regulations StromNEV. §19?

The regulations in §19 of the Electricity Network Charges Ordinance (StromNEV) §19 allow companies to reduce network charges under certain conditions. In addition to the general reduction of the highest load peaks in the year ("peak shaving"), it is possible under §19 Paragraph 2 Sentences 1 and 2 to agree on an individual network charge. Read more.

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How does EDF Renewables analyze my load profile?

The analysis consists of 3 steps.

Read more

Which industries can benefit from EDF Renewables’ service to reduce peak loads?

In general, every sector in industry and commerce is suitable for our battery system. We are mainly paying attention to the location (it should consume more than 1 GWh of electricity per year and have load peaks of at least 500 kW. The amount of electricity supplied must be measured using recording power metering (RLM).

Theoretically, smaller locations with lower consumption are also suitable for peak load capping. However, for smaller storage systems, it often makes more sense for you to invest directly in the system than to sign a service contract with EDF Renewables.

The offer

What are the benefits of EDF Renewables' BESS?

EDF Renewables Storage offers you a comprehensive service for smoothing out peak loads with high quality batteries - without investment risk and without great effort. We help you to store your energy intelligently and reduce your electricity costs.

EDF Renewables' BESS has over 10 years of experience. It means working with a qualified and experienced team.

What does the EDF Renewables peak capping service include?

EDF Renewables Storage offer the following services:

  • Battery sizing: according to your individual load curve.
  • Financing: the bettery remains with EDF. We share the savings.
  • Installation: procurement, authorisation, site integration and commissioning.
  • Operation and maintenance: operation by EDF over a period of >10 years.

What is the difference between the EDF Renewables offer and other suppliers?

EDF Renewables has developed a solution that allows you to deploy a battery storage system without any economic risk.

Read more

When should I start the process to have the battery ready for peak capping on 01.01?

Between the signing of the contract and the commissioning of our battery, it takes an average of 9 months.

Your savings in grid charges depend, among other things, on the updates of the grid operator’s specifications that are done at the beginning of every year. Thus, it would be optimal to have concluded the contract by the end of the first quarter.

Kann EDF Renewables mir die Ersparnisse garantieren?

Within the framework of EDF RS business model, there are no flat-rate costs, so you will always make a profit.

We offer various contract models:

  • Comfort, which is your all-round carefree package, where we assume the entire operational risk, e.g. in the event of changes to the legal framework.
  • Standard, where you actively support peak shaving and benefit directly from the savings achieved
  • Expert, where we provide the battery but leave the operation to you. However, you only pay for the times when you need the battery.

What do I have to do to get an estimated offer?

In order for us to value the potential of a battery on your site, all you have to do for a non-binding offer is to send us your load profile in 15-minute steps over a whole year in an Excel file. We will do the rest.

All documents are of course confidential, and the data are processed for the sole purpose of potential analysis.

Why do i need to make a visit?

The visit is useful both for you and for us. During the visit, we will introduce our company to you, explain the solution we can offer you in more details and answer your questions.

For us, a visit is also necessary so our technical team can check if there is enough space for the battery installation, but also all the required facilities linked such as connection point, cable ways, electricity meter access, the control cabinet, etc.

Therefore, the site inspection is a prerequisite for us to be able to make you a binding offer. Since our scope of delivery includes all work to be carried out in connection with the battery storage system, we must estimate the costs to be expected for this.

How are the site visits carried out?

The aim of the on-site inspection is for us to estimate the cost of installing and connecting the battery storage system. It is important to find a suitable installation site for the battery storage system.

Read more

How much do the battery system and the peak shaving service cost?

You do not have to make an investment upfront. EDF Renewables takes care of the investment costs for you, as well as installation and procurement.

We based our business model on the share of the annual savings through an annual fee.

What is the net profit per year?

The net profit depends on the load profile and grid charges of the site. EDF Renewables offers three usage options for the battery system: Standard, Power Intensive and Atypical.

Depending on the load profile of your site, the most profitable option will be used.

Installation and maintenance

What is the size of the storage system?

The provision of outdoor installation space depends on the size of the battery system as follows:

~120m² for power > 1MW, ~60m² for power < 1MW.

The provision of outdoor installation area depends on the Battery system size as follows:

~120m² for power > 1MW, ~60m² for power < 1MW

Where it is possible to install the BESS?

The exact location of the BESS will be determined together with you before installation. Our EPC -Engineering, Procurement and Construction- contract will make suggestions as to where the battery could best be set up. The BESS can be installed outdoors, with a barrier area of at least 2m around the container. The exact size of the exclusion area and the type of barrier will be determined according to local conditions.

Are there special requirements for installation?

Besides the space requirements, EDF RS requires the provision of a power supply for the construction phase, earthing point, and access to the site´s sanitary facilities. Also, it is important to have access to an open switchboard at the customer´s location.

Who provides the maintenance service?

On-site maintenance and servicing is carried out by a control center from our partner. Of course, it is possible to train your company's technicians so that they can take the first steps to rectify any minor problems.

All execution falls under the responsibility of EDF RS.

How can I track the BESS activity?

We inform you in real time when the battery starts up to meet the high power demand of the site (reaching Pmax). When the battery starts, you will receive a message by SMS or email. The parameters of these messages are defined with you depending on the site.

In addition, you will receive a detailed annual report on :

  • The load curve from the site meter to see the battery's uptime.
  • The site load curve as it would have been without the battery.
  • Performance indicators to evaluate the system and the resulting benefits to the site.

Once installed, what do I need to take care of?

All operation management falls under EDF RS responsibility, important maintenance needs to be coordinated to best suit the regular production of the site.

Does the Battery affect the overall HSE of the site?

EDF RS is responsible for compliance with all HSE from the Customer´s and internal EDF policy during all installation and operations phases.

How efficient is the battery’s fire protection?

The batteries fire protection system is connected directly to the Site´s during installation. EDF RS is responsible for the instruction of required personal and local firefighters for handling in case of emergency.

Is it possible to integrate your battery working with my already installed Load Management System (LMS)?

Yes, in the case of an existing LMS, EDF RS is responsible for the connection of this system to the Energy Management System and the Battery System operations.

What happens if, due to operational processes, the load profile changes and the battery loses its effectiveness?

The battery is sized to cap peak loads above a certain size. In addition, we have developed algorithms that regularly 'learn' from current consumption data.

Moreover, our battery has a flexible design. It allows us to adjust the size of the battery if there is a major change in the consumption profile of the site - for example, due to the use of new machinery or a big change in the production process.

This may lead to an adjustment of the agreed rent (increase or decrease depending on the new characteristics of the battery).


I have heard that the prices for storage solutions will drop sharply in the coming years. Why is it still worth taking EDF Renewables' offer?

According to Bloomberg Finance, lithium-ion battery cell prices will actually drop below $100/kWh starting in 2020. However, these cells only account for about 10% of the total price of a storage solution. The price of the entire storage package (which includes the battery cells, the modules, the electronic components, the security system, and the installation and maintenance services) will undoubtedly increase in the coming years due to the high demand for battery storage solutions around the world.

Therefore, we can assure you that our offer is fair and as well-tailored as possible to your needs.

Why does EDF Renewables offer peak-shaving services in Germany?

In Germany, the highest peak load of the annual electricity consumption determines the price consumers have to pay for the whole year.

In addition, German law provides incentives to reduce or shift the peak load (in Section 19 of the Electricity Grid Charges Ordinance) in order to stabilize the electricity grid. The country is currently expanding its power grid, which has significantly increased operating costs and will certainly drive up prices in the future.

Therefore, Germany is currently particularly attractive for battery installations.


Wie kann ich die Aktivität der Batterie nachvollziehen?

Wir informieren Sie in Echtzeit über den Start der Batterie, wenn die vom Standort angeforderte Leistung Pmax übersteigt. Beim Start der Batterie erhalten Sie eine Nachricht über SMS oder E‑Mail. Die Parameter dieser Nachrichten werden mit Ihnen je nach Standort festgelegt.

Zusätzlich erhalten Sie jährlich einen ausführlichen Bericht über:

  • die Lastkurve, die am Standortmessgerät abgelesen wird, zur Visualisierung der Betriebsdauer der Batterie
  • die Lastkurve des Standorts, wie sie ohne Batterie ausgesehen hätte
  • Leistungsindikatoren zur Evaluierung des Systems und der resultierenden Vorteile für den Standort
Energy transition

How does battery installation help the energy transition?

Participating in the energy transition means participating in reducing energy consumption and increasing efficiency to avoid a loss of the energy produced.

By installing a battery, we store energy that is produced but not consumed. Therefore, the energy produced is made efficient.

Installing a battery is therefore perfectly in line with the energy transition.

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