Home battery in the energy subscription
Buy power when it's cheap, use it when it's expensive, automatically. Part of the energy subscription, together with a heat pump and solar panels.
It saves your electricity for the expensive hours
A home battery stores electricity until you need it. When the panels give more than you use, or when the price is low in the middle of the night, it fills up. Then you use that power in the expensive evening hours, instead of buying when everyone else does and the price is at its peak.
You skip buying power when it's priciest, without touching a setting
The control handles the timing around the clock. It charges when power is cheap and empties when it's expensive, and the saving turns up in the background. How much you save depends on your consumption and how much you produce yourself, and we work that out when we look at the whole.
A battery isn't a backup generator, and we won't pretend it is
It won't keep the house running through a long power cut, and it isn't meant to. A home battery moves your everyday power from the expensive hours to the cheap ones and shaves the peaks. Full stop. We size it for your everyday life, not for a disaster.
The control is the whole point
A battery without smart control is an expensive box on the wall. Our control reads the power price and the weather and decides when the battery charges and when it's used, around the clock, without you touching a setting. It's the control that makes the same battery earn its keep instead of standing there looking expensive.
What does a home battery cost with us?
No price list. The battery has no price of its own here, it's part of the monthly fee for the whole subscription, together with the heat pump, the solar panels, the installation and the service. The fee comes out of the energy analysis and stays fixed for 15 years, adjusted once a year with CPI. As a standalone investment, a home battery is a hard sum to make work. As part of the whole, you never have to do that sum.
Ours and yours
The battery, the control, the installation and the optimisation: ours. The wall it hangs on: yours. If it breaks we replace it, that's included for 15 years. You never have to think about charge cycles or warranty terms.
Buy it yourself, or Elvy?Same battery, different obligations
| Buying yourself | With Elvy | |
|---|---|---|
| The investment | Buying yourselfThe full amount at once | With Elvy0 kr, part of the monthly fee |
| The control | Buying yourselfApps and your own settings | With ElvyAutomatic, around the clock |
| The sum | Buying yourselfHard to make work on its own | With ElvyPart of the whole, fixed price |
| Service and replacement | Buying yourselfYour cost, your problem | With ElvyIncluded for 15 years |
| The expensive hours | Buying yourselfYou buy power like everyone else | With ElvyYou use your own store |
It all fits together
no battery without a heat pump and solar panels. the three make each other efficient.
We only sell them together, at a fixed price with nothing upfront, and make our money keeping the system tuned year after year.
Common questionsAbout the battery
Yes. Proven batteries, installed to the regulations in a place made for it. Fire safety isn't something you should have to google at night.
About the size of a small cabinet on the wall, usually in a laundry room, garage or utility space. We find a spot together at installation.
Yes, all of it. You can't pick a single part with us. It's heat pump, solar panels and battery together that make the economics work and keep your price low.
Read moreGuides on batteries and power
- Battery
What does a home battery cost, and is it worth it?
What a home battery costs depends on the house. The honest figure doesn't exist until someone runs your numbers. Bought outright, payback is uncertain.
- Battery
How big a home battery do I need?
The right size for a home battery is measured in kilowatt-hours and depends on what you want it to do. Bigger isn't always better; it comes from an analysis.
- Battery
Solar and battery: do you really need both?
Do you really need a battery with your solar panels? In 2026 the answer is almost always yes. It raises self-consumption and can earn from support services.
- About Elvy
What is an energy subscription, and how does it work?
An energy subscription is a fixed monthly price for a home's electricity and heat. Elvy installs, owns and runs it. No upfront cost, same price for 15 years.
Your price depends on your house and your needs. Let us work it out.