Why storage changes the economics
Solar panels decide how much you generate; a battery decides what happens to it. Without storage, surplus power exports to the grid for 5p–15p per unit and you buy it back in the evening at ~24p. With storage, your daytime generation waits until you actually need it. For most solar homes that single change is the difference between a good investment and a great one.
Batteries also unlock time-of-use tariffs. Charge overnight at off-peak rates, discharge through the expensive evening peak, and the battery earns money every single day — sunshine optional. That's why battery-only installations are one of the fastest growing things we fit.
Systems we install
- Sigenergy SigenStor — the stackable tower we fit most: start at 8 kWh, expand module by module, with built-in hybrid inverter and optional backup.
- Tesla Powerwall — the household name, with whole-home backup capability.
- FoxESS & AlphaESS — excellent value LFP systems, ideal when pairing storage with a new solar installation.
- EcoFlow — flexible options where space or portability matter.
Everything we fit uses LFP chemistry — safer and longer-lasting than older NMC cells — and carries a 10-year warranty as standard.
Retrofit or new install
Already have solar? An AC-coupled battery bolts onto almost any existing system, whoever installed it. Starting fresh? A hybrid inverter running panelsand battery together is usually the cleanest, most efficient design. Installation is typically completed within a day for retrofit, or as part of a 2-day combined install.
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Get a free quote todayBattery storage FAQs
What size battery do I need?
The average UK home uses 8–10 kWh of electricity a day, so a 10 kWh battery is a common starting point. Modern stackable systems run from 5 kWh to 60 kWh — you can start small and add modules later as your needs grow.
Is a battery worth it without solar panels?
Often, yes. On a smart time-of-use tariff a battery charges overnight at cheap rates and powers your home through expensive peak hours. This tariff arbitrage alone can justify the system — we run the numbers for your usage before recommending anything.
Can I add a battery to my existing solar system?
In most cases, yes. An AC-coupled battery works alongside almost any existing solar installation regardless of inverter brand. We confirm compatibility during your survey.
Will a battery keep my power on in a power cut?
With a backup gateway fitted, yes — systems like the Sigenergy SigenStor and Tesla Powerwall can keep essential circuits running during an outage. Backup is optional and we design it in from the start if you want it.
How long do home batteries last?
Modern LFP (lithium iron phosphate) batteries are rated for thousands of cycles and typically carry 10-year warranties, usually guaranteeing at least 70–80% of original capacity at the end of the warranty period.
Related guides: Battery storage: what to know before buying ·Is solar PV still worth it?