Keep your energy for When You Need It
A home battery stores spare solar power — or cheap overnight electricity — so you can run your home in the evening instead of paying peak rates.
Stop giving your solar away
Most homes make the most solar in the middle of the day — when nobody's using much. Without a battery, that spare power is exported for a few pence, then bought back in the evening at full price.
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Use far more of your own solarStore the midday surplus and use it after the sun goes down.
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Charge up on cheap overnight ratesSmart tariffs let you fill your battery overnight for a fraction of the peak price — with or without solar.
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Run your heat pump or EV for lessPower them from stored energy instead of peak-rate electricity.
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Add one to existing solarAlready have panels? A battery can usually be added to your current system.
Where does your energy go?
Pick a season and a battery size to see how much of your solar you'd keep — and how much peak-rate electricity you'd still buy.
Illustrative typical day for a home using around 9kWh a day with a 4kWp solar system. Your figures depend on your home, system and tariff.
Sized for your home, not the brochure
Bigger isn't always better. We size your battery to how much you use in the evenings and overnight.
Usage-based sizing
We look at when you use energy, your solar and your tariff, then recommend the right capacity.
Home battery unit
A modern lithium battery, wall or floor mounted in a garage, utility room or outside, depending on the model.
Works with new or existing solar
Fitted alongside a new solar install, or added to panels you already have.
Smart tariff setup
We help you choose a tariff that makes the most of a battery, and set it to charge at the cheapest times.
Monitoring app
See your battery's charge, what it's powering and what you've saved, live on your phone.
Backup power option
Some systems can keep essential circuits running in a power cut. Ask us at your survey.
Make your battery work harder
A battery gets more valuable with every system it can feed — and every system that can feed it.
Solar Panels
Fill your battery with free energy from your own roof, every sunny day of the year.
Explore solar panelsAir Source Heat Pump
Run your heating on stored solar or cheap overnight energy, not peak rates.
Learn moreEV Charger
Charge your car from your battery or on the same cheap overnight tariff.
Learn moreThinking about a battery?
Can I add a battery to my existing solar panels?
Usually, yes. Depending on your current inverter, we'll either connect a battery to it or fit a battery with its own inverter. We'll check your setup at the survey.
Do I need solar panels to have a battery?
No. On a smart tariff, a battery can charge overnight at a low rate and power your home through the expensive part of the day. Adding solar later makes it even more useful.
What size battery do I need?
It depends on how much electricity you use in the evening and overnight, the size of your solar system and your tariff. We size it to your actual usage — bigger isn't always better value.
Will a battery keep my power on in a power cut?
Not automatically — many batteries switch off with the grid for safety. Some systems can be set up with backup power for essential circuits. If that matters to you, tell us at your survey.
Where does the battery go?
Usually in a garage, utility room or on an outside wall, depending on the model. We'll find the safest, most practical spot during your survey.
How long do home batteries last?
Modern lithium home batteries typically come with around 10-year warranties, and are designed to keep working well beyond that, with capacity reducing gradually over time.
Is there VAT on home batteries?
Home batteries currently have 0% VAT until March 2027 — whether installed with solar, added to existing panels or on their own.
Ready to cut your energy and heating bills?
Book a free, no-pressure home survey and get a fixed quote within 48 hours.