Does a home battery make sense with a fixed contract?
With a fixed contract a battery only earns from your own solar power: storing during the day what you would otherwise feed back, and using it in the evening. Charging at cheap hours yields nothing, because every hour costs the same.
From 2027, a kWh you use yourself is worth more than a kWh you feed back: you save the full rate, while for feed-in you only get the feed-in compensation, sometimes minus feed-in costs. That difference is what a battery earns with a fixed contract, for every kWh it shifts.
When can it pay off?
If you have a lot left over during the day and use a lot in the evening, and if your supplier pays little for feed-in or charges feed-in costs. The bigger the difference between the supply rate and the feed-in compensation, the more the battery yields per kWh.
VAT on the purchase
Reclaiming the VAT on the purchase is often only possible with a dynamic contract and smart control. With a fixed contract, you calculate with the price including VAT.
Switching later
A battery lasts a long time, a contract does not. If you have a fixed contract now, you can switch to dynamic later. The calculator works out both, so you can see the difference.
Calculate what a battery yields with your contract
An estimate, not personal advice. How the calculator works: How does this calculator work?
Other questions
- Does a home battery pay off?
- What changes when net metering ends?
- Do solar panels still pay off without net metering?
- Fixed or dynamic contract: which is cheaper?
- What is a dynamic energy contract?
- Is a dynamic contract smart with solar panels?
- How do I compare dynamic energy contracts?
- What are the risks of a dynamic contract?
- Does a dynamic contract pay off with an electric car?
- What are feed-in costs?
- What will the end of net metering cost me?
- Should I cancel my fixed contract before net metering ends?
- Does a home battery make sense without solar panels?
- Should I switch off my solar panels when power prices are negative?
- Does it pay to charge the electric car on solar power?
- Does a heat pump suit a dynamic contract?
- How do I read my annual electricity statement?
- What is a feed-in tariff?
- How much of my solar power do I use myself?
- Battery, charger, heat pump or another contract: what first?
- How big should my home battery be?
- Plug-in battery or fixed home battery?
- How much energy does a home battery lose?
- Is electricity cheap at night with a dynamic contract?
- What does a home battery do in winter?
- How much electricity do I use at night?
- Does a home battery suit a heat pump?
- Which energy comparison site can I trust?
- How do I calculate the payback time of a home battery?
- What do time-dependent network tariffs mean for me?