UK consumer guidance
Plug-in Solar vs Off-grid Solar
Plug-in solar offsets live household demand; off-grid solar supplies a separate battery and appliances.
They use some similar hardware but have different electrical boundaries, buying checks and jobs.
Last checked 28 July 2026
Choose by connection
A qualifying plug-in device operates in parallel with the grid through its approved route. An off-grid system must remain independent from household wiring.
- Plug-in: daytime grid import reduction
- Off-grid: appliance outlets and stored energy
- Plug-in: no power-cut supply
- Off-grid: backup possible if designed for it
Component compatibility
An off-grid shopping list still needs voltage, current, controller, inverter, fuse, cable and mounting checks.
Choose your next step
Questions answered
Can an off-grid inverter connect to a wall socket?
No. Do not use an off-grid inverter to backfeed household wiring.
Which suits a shed?
A separate off-grid system is normally the relevant route when the shed is not connected to the home supply.
For the statutory instrument, final specification, ENA register and government response, use the flagship official-sources guide.