Solar panels
Tier-1 all-black PV designed for overcast UK conditions.
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Battery storage
Charge on your cheapest tariff window, run the house on it at peak, and keep the lights on in a cut.
What's included
- Usage profile and tariff review
- Battery, hybrid inverter and changeover
- Dual-tariff schedule configured for you
- Backup circuit option for outages
- Annual health check
Typical numbers
- Typical capacity
- 5 – 15 kWh
- Install time
- 1 day
- Indicative cost
- £4,000 – £8,500
- Payback
- 7 – 10 years
Indicative only. Your survey gives fixed figures for your property.
How a home battery saves you money
A battery stores electricity when it is cheap and releases it when it is expensive. With solar panels, it soaks up the daytime surplus you would otherwise export, so you use your own power in the evening instead of buying it from the grid. Without solar, it charges overnight on a time-of-use tariff and runs the house through the expensive peak period.
Either way, the saving comes from the gap between the price you charge at and the price you avoid. That means the tariff you are on matters as much as the hardware, and it is why every battery we install comes with a charge schedule set up for your tariff.
Do you need solar panels to have a battery?
No. A battery on its own, charged on a cheap overnight tariff, can work well, especially in homes with high evening use or an electric car charging on the same tariff. Whether it pays back depends on the difference between your off-peak and peak rates and on how much you use at peak times.
At survey we model this against your real usage. If the numbers don't stack up, we will tell you, rather than fit a battery that sits half-used.
What size battery do you need?
Most homes we survey suit 5 to 15 kWh of storage. We size it from your evening and overnight usage, which smart meter data shows clearly, and from how much spare solar you produce on a typical day if you have panels.
Oversizing is the most common mistake we see. A battery that never fills up, or never empties, is capacity you paid for and never use. Many battery ranges are modular, so you can start with what the numbers support and add more later if your usage grows, for example when you buy an electric car.
Keeping the lights on in a power cut
Not every battery keeps your home running when the grid goes down. Backup needs extra equipment that safely disconnects your home from the grid, and a decision about which circuits to keep powered, since running the whole house would empty the battery quickly.
If backup matters to you, perhaps for a home office, a fridge-freezer or a sump pump, tell us at survey. We will design a backup circuit, which is listed above as an option, and explain exactly what will and won't work during an outage.
Where the battery goes and what installation involves
Batteries usually go in a garage, a utility room or on an outside wall. Manufacturers and current UK installation guidance both limit where a battery can be placed inside a home, so we confirm the location at survey rather than on the day.
Installation normally takes a day. We fit the battery, the inverter and the changeover equipment, notify your network operator, set up the charging schedule and show you the monitoring app before we leave. If you already have solar, we can usually add a battery without touching the panels.
AT Group is based in Leicester and installs across the UK through regional teams. Survey slots are usually within two weeks. Book a free survey.
Battery storage: common questions
How much does a home battery cost?
Most battery systems we install cost between £4,000 and £8,500, depending on capacity, whether you need a new inverter and whether you want backup power. The survey gives you a fixed price.
Is a home battery worth it?
It depends on your tariff and when you use electricity. Batteries pay back best for households with high evening use, a time-of-use tariff, solar panels or an electric car. We model it at survey and tell you honestly if it isn't worth it.
How long do home batteries last?
Manufacturer warranties are typically 10 years, and many guarantee a minimum share of the original capacity at the end of that period. The battery keeps working after that, holding a bit less charge each year.
Can I add a battery to solar panels I already have?
Yes, including systems we didn't install. Depending on your existing inverter, we either add a battery with its own inverter or swap your inverter for a hybrid one that runs both.
Will a battery keep my home running in a power cut?
Only if it is set up for backup. That needs extra equipment and a choice of which circuits to keep powered. Tell us at survey if you need it.
Other services
Air source heat pumps
Replace gas or oil heating with a high-efficiency system.
EV chargers
Smart charging from your solar or your cheapest tariff window.
Insulation
Loft, cavity and external wall work that cuts demand first.
Boiler upgrades
Modern condensing boilers and full system replacements.
Government grants
We check eligibility and handle the paperwork for you.
Maintenance & repairs
Servicing, fault-finding and repairs on any existing system.