You send us your details
The form is short and you do not have to create an account. If you are not sure about something, fill in what you think it roughly is. We would rather come back to you once than have you drop out on a field.
Tell us your usage and we will work out which battery fits.
You fill in your annual consumption, your solar panels and your connection. We work that out by hand and send you advice on the capacity that suits your home — and on what that set-up returns in practice.
Rather have an outcome straight away? Our savings calculator works out the same sum for you immediately — including your payback period. The form below is there for anyone who would rather have us look along.
On 1 January 2027 Dutch net metering ends. Surplus you feed in then earns far less than you pay for electricity — and your supplier may charge feed-in costs on top. What you store and use in the evening is electricity you no longer have to buy at the full rate.
Three figures decide which set-up is right
Choosing a home battery is not a matter of taking the biggest one. Too small and you have nothing left in the evening, too big and part of the capacity stands idle. So we start with the figures of your home.
Figure 1
Your annual consumption in kWh
The basis of the whole sum: how much electricity goes through your meter per year. An estimate is enough to calculate with.
on your annual statement
Figure 2
Your solar panels
The number of panels and watt-peak per panel decide when there is a surplus to store. No panels? Leave the fields empty.
quote or type plate
Figure 3
Your connection
Single-phase means the FlexVolt One LV, three-phase the HV. Do not know? We work it out together.
readable in the meter cupboardFill in what you know, we add the rest
Only your name and email address are required. The more you fill in, the sharper the advice gets, but with a rough estimate we can already make progress.
Where to find the figures
The annual consumption is on your annual statement, usually at the top with the overview of kWh used. The watt-peak per panel is on the quote or the invoice for your solar panels and, on most installations, on the type plate at the back. Your connection can be read in the meter cupboard, or checked with your grid operator.
Cannot work it out? Feel free to call or email. We can just as easily have the conversation by phone and pick up the details together.
We use your details only to make this calculation and send you the advice. You can read more about that in our privacy policy.
No number rolls out of a machine
After sending you do not get an outcome on the screen. A calculation that adds up asks for someone to look at your situation, and you hear from us as soon as we have taken that step.
We work it out by hand
We put your consumption next to your generation and your connection, and look at which capacity logically goes with that. If something is missing or a figure looks off, we get in touch first before issuing advice.
You get the advice by email
Once we have worked it out it lands in your inbox: which version and how many modules fit, and what you will do differently with your electricity in practice. If you want to go ahead, we put you in touch with a certified installer in the Netherlands.
What the advice contains
The advice is a readable piece, not a price list. We name which version suits your connection, how many modules we would take at your consumption and why we do not advise bigger or smaller.
We also explain what changes in your daily flow of energy: which part of your own generation you can still use yourself with storage instead of feeding it back, and at which moments of the day that difference arises. That control comes from FlexGrid, the energy management system that drives the battery and the inverter.
We look ahead as well. If a heat pump or a second electric car is coming, that is a reason to keep room to add a module later instead of filling everything up now.
- LV, single-phase
- 5.1 to 20.4 kWh system energy
- Module LV
- 5.12 kWh, of which 4.75 kWh usable
- HV, three-phase
- 7.6 to 22.7 kWh system energy
- Module HV
- 3.8 kWh
- Expanding
- Up to 16 modules per system
- Depth of discharge
- 95%
- Service life
- 7,000 cycles
- Warranty
- 10 years modules · 5 years inverter · 70% after 7,000 cycles
Financing
Rather spread it? The Warmtefonds lends along
With the energy-saving loan from the Dutch Nationaal Warmtefonds you do not have to pay for the home battery in one go. The application runs in three steps, and it starts with the quote — not with the loan.
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Request a quote first
The brand and type of the home battery must be clearly stated on that quote. Without those details the Warmtefonds cannot assess the application. If you do not know yet which set-up suits your home, have it worked out above.
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Submit the application to the Warmtefonds
You send the quote along and apply for the energy-saving loan. Watch the conditions: you are the owner and the occupant, it is for private use, and the battery goes on your own property.
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Have the battery fitted
The connection to your meter cupboard and your solar panels is done by a certified installer. That is also the condition under which the warranty applies.
Read on while we do the sums
If you want to form your own picture of what the advice will say, you can carry on here. Ordering goes through our webshop; the installation you arrange with a certified installer in the Netherlands.
Home battery
FlexVolt One
Home battery with LFP cells and 95% depth of discharge, in a single-phase (LV) and a three-phase (HV) version.
5.1 to 22.7 kWh Energy managementFlexGrid
Drives storage, charging and consumption, with forecasts of consumption, sun and heat demand.
500+ protocols Three-phaseFlexVolt One HV
For homes with a three-phase connection and room to grow considerably in capacity.
up to 81.6 kWhRather have someone on the line straight away
Requesting a calculation does not have to go through a form. Get your annual statement out and call us, and we go through the figures together so you hear right away which direction we are thinking in.