In many cases, yes, though it depends on the battery brand, the inverter setup, and how the original installation was configured.
Existing GivEnergy systems — GivEnergy Ltd entered administration in April 2026, so we check what backup hardware can still be sourced and supported before recommending an upgrade. Working GivEnergy systems can continue operating.
Existing Tesla Powerwall systems — Backup depends on whether Tesla's backup gateway was installed, so we still need to confirm how the system was installed and whether the required components are already in place.
What we check first: - The battery and inverter model - The distribution setup and consumer unit arrangement - Whether the current installation can isolate safely from the grid - Whether you want whole-home or essential-circuit backup
Retrofitting is often worthwhile — Especially in properties where outages have become more frequent or more disruptive than expected.
We can assess the existing battery installation and tell you what is possible, what hardware is required, and whether the upgrade makes financial sense.