2 November 2026 · Sun On Tap

Solar in Monmouth: autumn 2026 update

Three things changed this autumn that matter if you’re weighing up panels here: bills went up again, local installs kept climbing, and DIY plug-in solar became legal.

1. The price cap rose 4% — again

The price cap rose 4% on 1 October to £1,723 a year for a typical home — the fourth winter running above pre-crisis prices — and it resets again on 1 January. For a home in Monmouth, that maths is direct: a 4 kW roof here makes about 3,940 kWh a year, and every one of those units is one you stop buying at 26.32p — roughly £470–£780 a year kept in your pocket at current rates.

2. Monmouthshire keeps installing

Installs across Monmouthshire grew about 26% between 2023 and 2025, and 14.5% of local homes now generate their own power (DESNZ official statistics). That’s not early-adopter territory any more — it’s your neighbours’ roofs quietly paying for themselves.

The county is in the generation business itself: Monmouthshire County Council’s Oak Grove solar farm near Crick — backed by £4.5m of Welsh Government green investment — generates enough electricity for around 1,400 homes.

3. Plug-in solar is now legal

Since 27 August 2026, UK households can legally self-install small plug-in solar kits: up to 800W through a standard socket, using approved kits on the ENA type-test register, with a simple online notification to your network operator afterwards. Renters can formally request permission too. It won’t power a whole house, but it’s the cheapest legitimate way into solar yet — our DIY & plug-in guide covers the rules and our tested kit.

Help is still there for eligible households: the Nest scheme for eligible Welsh homes, plus 0% VAT on panels and batteries UK-wide.

What to do with this

Sources: Ofgem (cap), DESNZ regional renewable statistics 2025 (installs), PVGIS (yield). Figures checked 2026-11-02.