Plug-in solar in the UK: what changed, what to buy and where batteries fit

What changed in August 2026?

The government announced that compliant plug-in solar kits could be bought and used in Great Britain from 27 August 2026. The route is for solar-only equipment meeting the UK requirements, with output to the home limited to 800W. It is not permission to fit a UK plug to any imported inverter.

The government’s rollout announcement describes the change. Energy Saving Trust’s current consumer guidance says plug-in solar is not yet permitted in Northern Ireland. Do not apply the Great Britain route there.

Start by identifying which system you mean

For example, Anker Solarbank 4 Pro is an interesting storage option, but its UK instructions currently require a dedicated hardwired installation. Treat it as a separate buying decision, not an accessory you can assume belongs in a solar-only socket kit.

How the daytime saving works

Panels generate DC electricity. A microinverter converts it to AC which can offset electricity the home is using at that moment. If generation exceeds consumption, the surplus may flow to the grid. Export payment is a separate metering and tariff question; do not assume it is included.

Think about a fridge, networking equipment and other daytime demand. A sunny location is useful, but a household with very little daytime use may consume only a small share of its generation. Standard grid-following solar also stops supplying the grid during an outage; this is not a backup-power purchase.

What to check before spending money

• The product: ask for the exact model, UK compliance evidence, supplied plug, mounting system and instructions. Check the ENA device register rather than relying on a marketplace headline.
• The property: establish landlord, freeholder or building-manager permission, and any planning, building or insurance requirements. A balcony is not automatically suitable.
• The location: check shading, orientation, secure mounting and a direct route to a suitable socket. Energy Saving Trust advises against extension leads, international adaptors, altered plugs or linking devices together.
• The electrics: use a qualified electrician if wiring suitability is unclear or a socket needs installing. Follow the complete kit’s instructions.
• The network: current consumer guidance limits use to one device per property and requires registration. Follow the UK Plug-In Solar Registration service linked by Energy Saving Trust.

The final interim specification explains how the product and network requirements interact. Its scope excludes plug-in batteries and solar devices integrated with batteries. Check for later changes before combining equipment.

Put a number on self-use, not a promise on the box

Here is a fictional example, not an output forecast. Assume annual generation of 650 kWh, 60% used in the home, and an import rate of 27p/kWh. The avoided purchases are 650 × 60% × £0.27 = £105.30 a year, before any export income.

If only 20% is used at home, the same calculation produces £35.10. That difference is why your demand profile matters. Neither number includes finance, replacement equipment or changes in tariffs. Get an annual yield estimate for the actual location, including shading and the inverter’s output limit.

Compare a complete kit with the alternatives

There is no universal kit price in this guide. Compare panels, microinverter, approved connection equipment, mounting, delivery and any property work in the total. Then ask whether the money would do more in a larger rooftop installation, a suitable installed battery, or simply reducing demand.

A solar-only kit can be a useful starting point where the location, permission and daytime use fit. If storing electricity is the priority, compare Solarbank 4 Pro with Anker X1 and the wider installed-storage options. Keep the proposed system within the rules that actually apply to it.