Product

Octopus Energy plug-in solar kit

Part of a kit listed as compliant on the ENA register

One- and two-panel bundles sold by an energy supplier, with the only Octopus Energy entry on the ENA register behind them.

AC output: 800 VA
Type: Microinverter kit
Battery: Not included
UK availability: Available

Listed as compliant for plug-in use on the ENA register

Sold by Octopus Energy as one- and two-panel bundles. Plug-in solar is legal to use in Great Britain, and only kits listed as compliant on the ENA Type Test Register may be used. When we last checked the register, this model was part of a kit it listed as compliant — only that exact combination of inverter, panels and mounting is covered, and we have not tested it. We last checked on 16 October 2026, under the register’s “Plug-in Solar” device type. The register entry is OCTOQ/21124/V1/A5, “M1-800-E”, 0.8 kW, recorded as meeting G98. See the kits the register lists as compliant and the UK legal status.

Overview

Octopus Energy is the only energy supplier selling its own plug-in solar kit. Reading its plug-in solar page on 10 October 2026, it offers a one-panel bundle at £450 and a two-panel bundle at £650, built around 460W panels with a microinverter, a wall or ground mount and a five-metre cable with a three-pin plug. It quotes shipping weights of 90 kg for the one-panel bundle and 112 kg for the two-panel.

Octopus also makes a compliance claim in its own words: “We’ve had our Plug-in Solar system assessed by the Energy Networks Association (ENA), and it’s been deemed compliant for use by Distribution Network Operators (DNOs).”

This is desk research from Octopus’s own pages and our own reading of the register. We have not tested the kit, we do not rank products, and we carry no retailer or affiliate links.

What the register lists, and the one gap

When we read the ENA Type Test Register on 10 October 2026 it held exactly one Octopus Energy entry: OCTOQ/21124/V1/A5, model string “M1-800-E”, 0.8 kW, marked Compliant and recorded as meeting G98.

Here is the honest gap. Octopus does not print a model code anywhere on its plug-in solar pages, so we cannot tie “M1-800-E” to the bundle on sale from Octopus’s own documentation. What we have is Octopus stating that its Plug-in Solar system has been ENA-assessed and found compliant, and a register that holds one Compliant Octopus Energy entry and no other candidate.

We think those two facts point the same way, and we have said so by treating the kit as covered by that entry. But we have not seen Octopus confirm it, so if the reference matters to you — and it should, because the register lists combinations rather than brands — ask Octopus to confirm that your bundle is sold under OCTOQ/21124/V1/A5. We apply the same rule to every brand: see how we assess plug-in solar products.

The export tariff angle, and its limit

Octopus is the only supplier that pairs a plug-in kit with an export tariff, which is the main reason people ask about it. The condition is narrow: buyers of its own kit who also take their electricity from Octopus get access to its Outgoing Prime rate. Its page is blunt about the alternative — if you bought a system elsewhere, “you won’t be able to sign up for an Octopus export tariff for that system”.

Two things to hold on to. Octopus estimates total savings of £50 to £150 a year, and that figure covers self-use and export together rather than export alone. And when we read all six major suppliers’ export pages on 5 October 2026, every one of the others asked for a certificate issued by an installer, which a self-installed kit does not have. See the Smart Export Guarantee.

What a listing does not cover

Buying from a supplier does not change any of the duties that come with a plug-in kit:

Register the device. Octopus says so too: “You’ll need to register it on the ENA website and wait for approval by your local DNO.” See how to register a plug-in solar kit.
One device per household, 800 VA maximum, no battery storage. Northern Ireland is not covered.
Check your consumer unit before you order — see RCDs and DC leakage.
In England, where you mount it matters — see planning permission.

Manufacturer documentation

Bundle contents, prices, weights, the ENA statement and the export conditions above come from Octopus Energy’s own plug-in solar page, read on 10 October 2026. Prices are shown after a postcode check, so yours may differ. Compliance status comes from our own reading of the ENA Type Test Register the same day. For the launch itself, see our news story.

Estimate output for a system this size

See what an 800W system could generate at your postcode, and the indicative bill saving.

Open the calculator