Battery storage for only £35 a month

Battery PowrPlan is available to most UK home owners. It is a 10-year Power Purchase Agreement (PPA) that gives you a 12.8kWh battery installed in your home at no upfront cost. The battery charges when energy is cheapest – such as overnight on an off-peak or EV tariff – and then powers your home during the day. This means you avoid paying expensive peak-time rates and reduce your monthly electricity bill.

You pay a flat £35 per month, or £385 per year if you choose to pay annually. This cost is fixed for the length of your contract and only increases each year in line with inflation. There are no hidden fees or installation costs – everything, including DNO applications and maintenance, is handled by Wondrwall.

Wondrwall can offer Battery PowrPlan at such affordable rates as the cost of the battery is subsidised with grid flexibility payments from the National Grid. These are payments earned for helping to reduce the peak load on the grid and also supporting the UK’s transition to a zero carbon energy system.

For a typical UK three-bedroom home with gas heating, you could see savings of around £60 per month on electricity bills. Larger homes or those using electric heating (such as heat pumps or electric heaters) may see even greater savings. However, actual savings depend on your energy usage and tariff, so reductions cannot be guaranteed.

No, you don’t need solar panels to take advantage of the Battery PowrPlan. The battery stores cheap, off-peak energy from the grid that you can use during the day. However, if you do have solar panels, the battery can also store your excess solar power, giving you even greater savings.

To maximise your savings, we recommend being on a time-of-use tariff that offers cheaper off-peak electricity. The battery will automatically charge during these low-cost periods and supply your home during peak hours. If you’re not already on a suitable tariff, our team can guide you on how to switch.

Battery PowrPlan is designed to give you long-term stability in your energy costs. You have a 14-day cooling-off period from the date you sign the contract, during which you can cancel at any time. Midway through the contract, you’ll have a choice: either continue with the monthly payments or pay a settlement fee based on the hardware’s remaining value at that point.

If you decide to move home, your Battery PowrPlan contract can be transferred to the new owner, helping to enhance the value of your property. Wondrwall will support you with the contract transfer during the sale process.

Wondrwall batteries are IP66 rated and we recommend an external installation (a well-ventilated garage is also possible). Installations on south-facing walls may require additional protection from direct sunlight.

Internal installations are possible but this will require additional works to ensure all current installation guidelines are met. These additional costs will be charged separately from the standard installation that is included in your PowrPlan agreement.

Our battery is certified with IEC 62619. As part of this test, the battery has demonstrated that a thermal runaway event will be contained within the battery and will not cause a fire. Advanced monitoring can notify Wondrwall of a potential issue roughly 2 weeks in advance.

All batteries need to be registered with the DNO (District Network Operator). This helps them forecast the electricity demand and keep the electricity network stable. Solar PV installations and EV chargers have the same requirement. As the Wondrwall battery provides a high 6 kW peak discharge rate, we need a special permission which takes longer to achieve. The 6 kW discharge rate is required to provide adequate power for the home in the event of a power cut.