UK plug-in solar · Est. 2026
Independent
solar guidance
for every home
800Watts is a UK charity providing clear, impartial information about plug-in solar energy.
We help renters and homeowners understand their options, navigate the regulations, and make
informed decisions about small-scale solar — without selling anything.
800W
Hard cap per property
BS 7671 Amendment 4
£160–216/yr
Estimated annual saving
south-facing, home days
3–6 yr
Typical payback period
depending on setup
~£250+
Est. min. initial investment
800W (2 panels + microinverter)
Early access
Get notified when we launch
We go live in June 2026 — before the DIY rules change in July. Register your email
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What we cover
01
Legislation & rules
What BS 7671 Amendment 4 means in practice. G98 notification, the 800W cap, and what changes in July 2026.
02
Costs & savings
Realistic figures. What a south-facing system generates. What you save if you are home or out 9–5. Payback periods.
03
Guide for renters
Your rights under the Renters' Rights Act 2025. How to request installation from a landlord. What counts as unreasonable refusal.
04
Equipment
Which microinverters are G98-listed. Panel sizing and placement. Battery storage options. What to avoid.
July 2026 — Regulatory change
From approximately July 2026, true plug-and-socket DIY systems are expected to become fully compliant
once the BSI product standard publishes. Until then, hardwiring by a CPS-registered electrician
is required. Our guidance reflects both stages.