Solar Energy Concepts

DIY Solar for UK Homes. Real guides from a real install.

Step-by-step practical guides, component lessons, and hard-earned fixes from a real UK DIY solar setup.

7.15kWpinstalled 6,072kWhgenerated 2025 £1,668/yrmodelled value

Start small Plug-in solar Rules, kit, costs, and what 800W can actually do. Buy well Panel prices Current UK prices and what is changing in 2026. Level up Batteries When storage makes sense, and when it is dead money.

Latest field notes

Fundamentals

Plug-in Solar Rules Across Europe (and What the UK Is Copying)

Plug-in solar is legal across much of Europe: Germany alone has 1.2 million registered systems, on an 800 W inverter cap and one online form.
The UK legalised socket connection on 27 August 2026: that covers Great Britain, not Northern Ireland. On 2 September 2026 the ENA register listed 20 compliant kits, and the limit is one plug-in device per household.
Every country where plug-in solar actually took off shares three things: an official product safety standard, a one-step registration process, and (in the stronger examples) a legal right for renters to fit one.
The details vary sharply across Europe, from France’s no-export promise and Belgium’s approved-kit list to Switzerland’s stricter 600 watt cap and Lithuania’s flat cash subsidy for installing one.
The UK spec lands where Germany did: 800 VA limit, up to 2,000 W of panels, BS 1363 plug with 5 A fuse. The government confirmed that specification on 16 July 2026 and the law has been in force since 27 August 2026. Only a kit listed as Compliant on the ENA register may go into a socket.
German 2-year payback posts usually include free export: UK DIY plug-in kits should assume £0 export income.

Updated 2 Sep 2026 Read Entry →

Fundamentals

Does an Outdoor Socket Make Plug-in Solar Legal?

An outdoor socket does not make plug-in solar legal: the weather rating was never the rule. Since 27 August 2026 the kit decides it.
The new rules allow socket circuits only, and ban extension leads: a fixed outdoor socket spurred off a ring circuit fits that. A lead run out of a window does not.
Three rulebooks get blurred into one: Part P covers installing the socket, the wiring standard and SI 2026/848 cover the backfeed, and G98 covers notification. Only the first is a socket question.
One device per household, not one per circuit: G98 Amendment 1 confirmed that in August 2026. Adding 800 W to an existing 3 kW array pushes the whole property from G98 into a G99 application.
Twenty kits were listed Compliant on 2 September 2026: Argos sells UKSOL kits from £599 with delivery estimated late October. The Amazon look-alikes and the battery kits are still not covered.
Do the slow part first: have the outdoor socket fitted on a socket circuit, check the RCD type on that circuit, then buy a kit whose exact model is listed Compliant on the ENA register.

Updated 2 Sep 2026 Read Entry →

Fundamentals

Is Plug-in Solar Legal in the UK? Rules, Kits & Limits (2026)

Plug-in solar is legal in Great Britain since 27 August 2026: 20 kits are listed Compliant on the ENA register and Argos sells six from £599, with delivery in late October.
Only listed models count: the Amazon kits with a UK plug are unlisted or Non-compliant, and battery kits are excluded by the law itself.
Not every home is suitable: the IET and Electrical Safety First say a Type AC RCD rules a home out, and only 25% of adults know which type they have.
One device per household is now written into G98: the August 2026 amendment says connecting more than one “is not allowed”, so the per-circuit relaxation did not happen.
Realistic savings are £43 to £84 a year, not the government’s “up to £110”: 650 to 800 kWh, 25 to 40% self-consumed, £0 export. Payback 7 to 14 years on the £599 kit.
Already have roof solar? The 3.68 kW limit is cumulative per property, and G98 now says so for plug-in kits in terms.

Updated 2 Sep 2026 Read Entry →

Fundamentals

Your Guide to Home Solar Energy: DIY and Professional

Start with your goal, not the hardware: bill reduction, resilience, DIY learning, and export income lead to different system designs.
Roof direction and shading decide the first cut: a simple south-facing roof is easy; mixed, shaded, or small roofs need more design work.
Batteries change the economics by moving solar or cheap-rate electricity into expensive evening hours.
DIY can save money, but compliance still matters: inverter certification, DNO notification, isolation, and safe wiring are not optional.

Updated 2 Sep 2026 Read Entry →

An image of a wall with solar panels from the ground up. On a nice sunny day.

Fundamentals

Wall Mounted Solar Panels UK: Vertical Mounting Guide (2026)

Vertical wall mounted solar produces about 290 kWh/year per 400W south-facing panel in the UK, roughly 30% less than an optimal roof mount.
Wall wins when the roof is full, shaded, or wrong-orientation, or when you want better winter sun on a vertical face.
DIY vs installer is a safety and compliance choice, not only a cost choice.

Updated 2 Sep 2026 Read Entry →

Practical and DIY

DNO Registration for DIY Solar UK: G98 and G99 Step-by-Step (2026)

DNO registration is G98 or G99 for generation: export payments still need a supplier process and usually an export MPAN.
3.68 kW AC single-phase is the usual G98 boundary: above that, apply for G99 before you install.
Keep a clean document pack: MPAN, inverter type-test, single-line diagram, DNO letter, EIC and Building Regs evidence.
After the DNO letter, fork to export: Octopus DIY export without MCS.
Most delays are preventable: wrong MPAN, unlisted inverter, missing diagram, or treating DNO approval as an export tariff.

Updated 2 Sep 2026 Read Entry →

Solar gazebo from the side on a sunny day

Practical and DIY

Solar Expansion With Added Value: DIY Solar Gazebo

Honest verdict: a solar gazebo is expansion with garden value, not a free lunch on yield per panel.
My build: about £2,018 including tools for 3.28 kWp on a ~6° flat roof structure.
Flatter tilt means more panels and more cleaning where water ponds on the frame edge.
Compare roof and ground first if height safety and planning allow a better tilt.

Updated 2 Sep 2026 Read Entry →

Fundamentals

Is Your Home Suitable for Plug-in Solar? The RCD Check

Not every home is suitable for plug-in solar, and the RCD decides it: a Type AC RCD on the socket circuit rules a home out; Type A, F or B passes if bidirectional.
You can read the type off the label in five minutes: a sine wave alone means Type AC; extra pulsed, ripple or DC marks mean A, F or B. Bidirectional rating usually needs an electrician to confirm.
A fuse box with no RCD is not damaged by a kit, but it gives you no shock protection: Electrical Safety First says inspect first.
Socket circuit only, no extension leads or adaptors: and above 960 W of panels, most two-panel kits, the maker must tell you to consider a professional check.
One device per household and under 3.68 kW across the property: both confirmed in the August 2026 G98 amendment, which says a second plug-in device “is not allowed”.
Ten lines decide it: if the first two fail, the right first purchase is an electrician’s visit, not a £599 kit.

Updated 2 Sep 2026 Read Entry →

Bar chart displaying electricity export data over time, with peaks indicating higher export volumes on certain dates.

Practical and DIY

How to Export DIY Solar Energy with Octopus (No MCS): UK Guide 2026

Yes, DIY solar can export without MCS via Octopus when you meet its evidence bar; most other suppliers still require MCS.
Register in order: DNO letter first, then Octopus form, fee, certificates, export MPAN, tariff live.
A DNO letter is not an export MPAN: generation registration and export metering are separate steps.
Documents that matter: G98/G99 confirmation, EIC, Building Regulations evidence, smart meter, system details.
Expect weeks, not days, for the export MPAN after documents clear (operational expectation as of July 2026, not a guaranteed SLA).
Common failures: missing DNO paperwork, certificate gaps, meter issues, and treating the beta route as guaranteed.

Updated 2 Sep 2026 Read Entry →

View Full Archive