Best DIY Solar Panel Kits UK (2026)
A "DIY solar kit" can mean anything from a £120 caravan panel to a £2,500 full roof system. This guide compares the kits that actually make sense in the UK in 2026, grouped by what you're trying to do — power a house, add a plug-in balcony system, or run an off-grid cabin or campervan.
Use the sortable table to compare at a glance, then read the picks below it. Every price is a realistic 2026 UK street price for the kit hardware only — you'll still need an electrician for the final connection on any grid-tied system.
DIY solar kits compared
Tap any column heading to sort. ⭐ marks our pick in each category.
| Kit type | Best for | Power | Panels | Approx price | Our rating |
|---|---|---|---|---|---|
| Full roof kit (4kW) | 3-bed house | 4.0 kWp | 10 | £1,700–2,100 | 9 / 10 |
| Full roof kit (6kW) | 4-bed / high usage | 6.0 kWp | 15 | £2,400–3,000 | 9 / 10 |
| Hybrid kit + battery | Self-sufficiency | 5.0 kWp | 12 | £4,200–5,400 | 8 / 10 |
| Plug-in balcony kit | Flats / renters | 800 W | 2 | £350–650 | 8 / 10 |
| Off-grid 12V kit | Shed / caravan | 200–400 W | 1–2 | £200–450 | 8 / 10 |
| Portable power station + panel | Camping / backup | 100–220 W | 1 | £500–900 | 7 / 10 |
Best full roof kit — 4kW grid-tied
For most 3-bed UK homes, a 4kW (10-panel) kit is the sweet spot: enough to cover the bulk of daytime usage, small enough to sit on one roof plane, and under the 3.68kW-per-phase threshold is easy to exceed so you'll typically notify your DNO with a G99. A good kit bundles ten 400–440W monocrystalline panels, a 3.6–5kW string inverter, rails, clamps and DC cable.
Look for Tier-1 panels (JA Solar, Longi, Aiko, Jinko) and a named inverter brand (Solis, Growatt, GivEnergy). Expect £1,700–2,100 for the hardware. Browse 4kW solar kits on Amazon →
Not sure on size? Our savings calculator sizes a system against your actual bill and shows the payback.
Best kit for self-sufficiency — hybrid + battery
A hybrid inverter kit adds a battery so you use more of your own generation instead of exporting it cheaply. A 5kWp array with a 5–10kWh battery and a hybrid inverter (Sunsynk, Solis Hybrid, GivEnergy) lands around £4,200–5,400 for DIY hardware. It's the best route if you're also on a time-of-use tariff and want to arbitrage cheap overnight electricity.
Browse hybrid solar + battery kits → · Read the inverter buyer's guide first.
Best plug-in kit — 800W balcony solar
If you rent or live in a flat, an 800W plug-in balcony kit is the newest option — legalised in the UK from April 2026 under BS 7671 Amendment 4. Two panels, a micro-inverter, and a mounting bracket for a balcony rail or wall. No roof work, and it moves with you. £350–650 depending on the panels.
Full detail in our balcony solar guide. Browse balcony solar kits on Amazon →
Best off-grid kit — 12V for sheds, caravans & campervans
For anything not connected to the house — a shed, allotment, static caravan or campervan — a 12V kit with a 100–200W panel, an MPPT charge controller and a LiFePO4 leisure battery is cheap, simple and needs no electrician or DNO paperwork. £200–450 all in.
Browse 12V off-grid solar kits →
Best grab-and-go — portable power station + folding panel
Portable power stations (EcoFlow, BLUETTI, Anker) paired with a folding solar panel are the plug-and-play end of the market: no wiring, no regs, useful for camping, power cuts and running tools where there's no mains. £500–900 for a usable 1kWh-class unit plus a 100–220W panel.
Browse portable power stations →
What to check before you buy any kit
- Inverter grid-code certificate — for anything grid-tied, the inverter must have a valid UK G98/G99 certificate or your DNO connection is non-compliant.
- Panel tier and warranty — Tier-1 panels with a 25-year performance warranty. Avoid unbranded panels with vague specs.
- What's actually in the box — most "kits" exclude the AC cable, AC isolator and the electrician's labour. Read the contents list.
- Roof-specific mounting — tile, slate and metal roofs need different hooks. A generic rail kit may not fit your roof.
- Total cost, not kit cost — add ~£200–400 for a Part P electrician's final connection and sign-off. See the full installation guide.
Size it before you spend
Two minutes with your electricity bill tells you which kit fits — and your payback period.
Open the solar calculator →Frequently asked questions
Do DIY solar kits include everything you need?
Full roof kits usually include panels, an inverter, mounting rails, clamps and DC cabling with MC4 connectors. They rarely include the AC cable to your consumer unit, the AC isolator, or the electrician's final connection and sign-off, which UK regulations require. Always check the kit contents list and budget for a Part P electrician.
Are cheap solar kits from Amazon any good?
Small 100W–600W panel-and-controller bundles are fine for sheds, caravans and off-grid use. For a house you want a proper grid-tie or hybrid inverter and Tier-1 panels (JA Solar, Longi, Aiko, Jinko). Avoid no-name inverters for grid-connected systems — they must meet G98/G99 and hold a valid UK grid code certificate.
What size DIY solar kit do I need?
Work backwards from your annual usage. A typical UK 3-bed home uses 2,700–3,600 kWh a year and suits a 3.6–4.8 kWp kit (9–12 panels). Use our solar calculator to size it against your own bill.
Can I install a DIY solar kit legally in the UK?
Yes. There's no law requiring an MCS installer to fit panels, but the final electrical connection must be signed off by a Part P qualified electrician, and you must notify your DNO via a G98 or G99 form. MCS certification is only needed to claim Smart Export Guarantee payments.