Home battery storage installation in Northern Ireland

Use far more of what you generate. Without a battery, a typical household uses 35–50% of its solar directly. The rest is exported at around 12p with Power NI (October 2026), against an import rate near 34p. A correctly sized battery lifts self-consumption to around 70%, and every unit shifted is worth the difference between the two.

Charge on cheap night units. On an Economy 7 or smart time-of-use tariff the battery charges overnight at the low rate and discharges through the evening peak. On its own that can be worth several hundred pounds a year, which is why battery-only retrofits now make sense for households without a suitable roof.

Backup power when the network drops. With a backup gateway fitted, essential circuits such as lighting, the fridge and freezer, broadband and an oil boiler keep running through an outage. Worth specifying if you are on a rural feeder in Fermanagh, Tyrone or the Glens where storm-related interruptions are more common.

Sized on your evening load. Oversizing a battery is the most common way to ruin the payback. We model your overnight and evening demand against your generation profile and specify the capacity that will actually cycle every day, then leave headroom to expand later if your load grows.

A home battery in Northern Ireland typically costs £3,000–£7,000 for 5–13 kWh of usable capacity, stores surplus solar for evening use, can be charged on cheaper night-rate electricity, and is zero-rated for VAT until 31 March 2027 whether or not it is fitted alongside solar panels.

A battery keeps the solar you don't use during the day for the evening. It can also be worth fitting on its own: on a time-of-use tariff it charges on cheap night units and runs the house through the expensive evening peak.

Expect roughly £3,000–£4,500 for a 5 kWh system, £4,500–£6,000 for around 10 kWh, and £6,000–£7,000 for 13 kWh, fully installed with 0% VAT. Fitting a battery at the same time as solar is cheaper than a later retrofit because the hybrid inverter, scaffolding and electrical works are shared.

Yes, and it is increasingly common. A battery-only install charges from the grid on a cheap night rate and discharges during the expensive evening peak. It also carries 0% VAT in its own right following the February 2024 change to the energy-saving materials relief, so you no longer need panels to qualify.

Most Northern Ireland households land between 5 kWh and 13 kWh of usable capacity. The right figure is roughly your evening and overnight electricity use, which for a typical home is 6–10 kWh. Going bigger than your daily cycle simply adds cost that never gets used, so we size from your actual consumption data.

Only if a backup gateway is specified. A standard grid-tied battery shuts down in an outage for safety, because it must not energise a network that engineers may be working on. Adding an islanding-capable gateway lets the battery run selected essential circuits while staying safely disconnected from the grid.

Modern lithium iron phosphate batteries carry a 10-year warranty and are typically rated for 6,000–10,000 full cycles. The warranty promises 60–80% of the original capacity at the end, depending on the product. Cycling once a day, that is a realistic service life well beyond the warranty period.

The LFP chemistry we install is thermally stable and does not contain cobalt, making it substantially more fire-resistant than the NMC cells used in older products. Units are installed to BS 7671, in a ventilated location away from escape routes, with isolation and fire detection as required by the risk assessment.