Do you need a battery with solar?
We look at when you use electricity before discussing how much storage to add.
Follow the electricity
A battery can store electricity for later. The useful starting point is how much you expect to have available to store, and how much you can use when the panels are producing less.
Read both ratings
Energy capacity is measured in kWh; output power is measured in kW. For illustration, 5 kWh would supply a steady 1 kW load for five hours before losses and operating limits. Real usable capacity and power limits depend on the equipment.
Check existing equipment
If you already have solar, we need the inverter and panel details. We can then discuss compatibility and the work involved. We also look at a practical location for the battery.
Ask about the extras
Backup during a power cut needs explicit discussion. So do tariff controls, warranty conditions and expansion. We keep those questions separate from the headline storage capacity.
Further reading
Energy Saving Trust: storing energyExamples explain the calculation; they are not a tariff offer or an installation quote. Check current scheme and supplier terms before deciding.