There are a lot of questions about battery storage so we have put together this frequently asked questions guide.
A home battery storage system allows you to store the excess electricity your solar panels generate during the day and use it later, like in the evening when your energy demand is higher. This reduces reliance on the grid and helps cut your energy bills.
Savings vary depending on your usage and system size, but many homeowners reduce their electricity bills by 50% or more by storing and using their own solar power. Pairing a battery with off-peak tariffs can bring even bigger savings.
Yes. Most modern battery storage systems can be retrofitted to existing solar PV systems. Our engineers will check compatibility and recommend the best solution for your home.
Most high-quality batteries, like Tesla Powerwall or MyEnergi Libbi, come with warranties of 10 years or more. With proper use, you can expect reliable performance well beyond the warranty period.
If you choose a battery with backup functionality, such as the Tesla Powerwall, your home can stay powered during outages. Not all batteries include this, so we’ll help you choose the right model for your needs.
Yes, standalone and retrofitted battery storage systems qualify for 0% VAT in the UK. This makes it more affordable than ever to add storage to your home.
“OHM Energy know their stuff when it comes to solar, home batteries and air-source heat pumps. They did an energy assessment of my house in Eastbourne, gave a competitive quote, talked it all through, took a deposit and then scheduled the install of 16 solar panels, a Tesla Powerwall battery and two Mitsubishi air-source heat pumps that work in cascade for hot water and central heating. They helped me to do the paperwork for the government grant of £5k (which has recently gone up to 7.5k!) to help pay for it all. I didn’t know much about the technology at first but they explained everything, and the heat pump kit in particular was more complicated than I expected (quite a few pipes and valves and a new water tank). I’ve had it all for over a year now and it’s worked incredibly well. We no longer burn any gas, and we generate a load of our own electricity too, much of which I sell back to the grid in the mid- summer months when there’s lots of sun and we don’t have the heating on. I still buy from the grid in winter, but the battery allows me to buy at night when electricity is cheapest. One of the heat pumps broke down once, and the OHM service team were out quickly to fix it. OHM have been doing this technology for over a decade and really seem to know what they are talking about, which is reassuring.” Daniel Smart
Commercial battery systems lower energy bills by storing cheap, off-peak electricity or excess renewable energy for use during peak times. They also provide resilience against power cuts and help businesses meet sustainability goals.
It depends on your energy profile. At OHM Energy, we design systems and tailor capacity to your site’s demand, operating hours, and energy goals.
Yes. By discharging during peak times, commercial batteries can significantly reduce demand charges and cut operating costs. This is especially valuable for energy-intensive industries.
We install trusted commercial-scale systems from brands like Eaton, Sigenergy, and Tesla. All come with robust warranties and integration options for solar PV and EV charging.
Most businesses see payback within 5–8 years, depending on system size, tariff structures, and available incentives. We provide a detailed ROI forecast before installation.
Absolutely. Using stored renewable energy lowers your carbon footprint, supports net zero commitments, and demonstrates environmental leadership to customers, investors, and regulators.
Contact OHM Energy today for a free consultation and tailored quote.
Subscribe to the OHM newsletter for exclusive energy incentives and offers.