Yes, since 8 September 2026. Octopus is the first energy supplier to get a plug-in solar device onto the ENA register, and it cleared roughly three weeks before its own first deliveries. £450 for one JA Solar 460W panel, £650 for two, including VAT and delivery. Here is what it is, what it costs per watt, and the one detail Octopus does not print anywhere on its product pages.
There is a pattern worth learning if you are going to follow this market, and the Octopus filing is a clean example of it. A brand name appearing on the ENA register generates headlines that sound like an approval. It is not one. The register has two states that matter, Compliant and Non-compliant, and the gap between filing and clearing has so far run anywhere from a week to never. Anker filed first, on 3 August, and is still Non-compliant nearly four weeks later. UKSOL filed later and cleared on 18 August.
Two bundles, both built around the same 460W panel. One panel is £450 and two panels are £650, both figures including VAT and kerb-side delivery, and both quoted on the Octopus site as available for delivery by the end of September 2026. Each bundle ships with a wall or floor mount, a microinverter and a five metre cable with a three pin plug on the end. Octopus also says more compact options are coming in the next few months, and that a plug-in battery called the Nook Cube follows in the first quarter of 2027.
On price alone this is competitive rather than remarkable. The two panel bundle works out at £0.71 per watt of panel, which is mid-table. It sits well behind City Plumbing's own-label kits at £0.45 to £0.48, just behind the PatioSun Max at £0.69, and comfortably ahead of every UKSOL kit. The single panel bundle is £0.98 per watt, which is ordinary. The interesting number is not the price, it is the customer base it is being sold into.
The thing to hold in mind is the sequence. You can order today, and the kit arrives at the end of September. Ordering is not plugging in, and none of this is unlawful. The device Octopus filed cleared on 8 September, so an order placed now is an order for an approved kit rather than a bet on one. That is a reasonable expectation and it is not a certainty, and it is worth knowing which of the two you are relying on.
One device, not a kit. The entry is a microinverter rated at 0.8 kW single phase, which is the export ceiling the DESNZ Interim Product Specification sets for every plug-in solar device. The model number is M1-800-E.
The detail that tells you most is what else appeared the same day. FoxESS filed FOXES/21121/V1 on 25 August 2026, and it is the same model number, M1-800-E, at the same 0.8 kW. We inferred from that pairing alone that Octopus was not building a microinverter but putting its name on a Fox ESS M1. Octopus has since confirmed it in its own words: the two panel product page lists “Fox ESS microInverter” among the contents. That is an ordinary and entirely legitimate arrangement, and it is worth knowing because it tells you the hardware is a known quantity with an established manufacturer behind it rather than something built from scratch for the UK launch.
| Reference | Filed by | Model | Filed | Status |
|---|---|---|---|---|
| OCTOQ/21124/V1/A5 | Octopus Energy | M1-800-E, 0.8 kW single phase | filed 25 Aug, cleared 8 Sep 2026 | Compliant |
| FOXES/21121/V1 | FoxESS | M1-800-E, 0.8 kW single phase | 25 Aug 2026 | Non-compliant |
| The rebadge has cleared and the original has not, which is the opposite of what you would expect and worth watching. | ||||
| Recorded from the ENA G98/G99 Type Test Verification Register, Plug-in Solar device type, checked 4 September 2026. Statuses change, so check the register before buying anything. | ||||
Every other name on this register is a hardware business: panel makers, inverter makers, a plumbing merchant. Octopus is an energy supplier with millions of customers, a tariff engine and an existing installation arm. A supplier does not file a microinverter in order to sell microinverters.
The obvious play is bundling. A plug-in kit is a small, low-commitment product that suits being sold alongside a tariff, financed over a bill, or handed to a customer as part of a smart-energy package. That is a very different route to market from a £989 box on the Argos shelf, and it is the route most likely to move volume, because it removes the upfront cost that is currently the biggest obstacle. It is also how balcony solar scaled in Germany, where energy retailers and large platforms did as much of the selling as solar specialists.
The caution I would attach: a supplier bundling hardware with a tariff is a structure that can bury the real cost. If and when this launches, the number to ask for is the cash price of the kit, separately from whatever the tariff does, so it can be compared per watt with everything on our pricing table.
It cleared on 8 September, fourteen days after filing and three weeks before the first kits are due. That is fast, and it is not the norm: Anker filed on 3 August and is still Non-compliant more than a month later, so filing early guarantees nothing. The register has taken on one hundred and two further kits since the law changed, so the pipeline is plainly moving.
The direction of travel is measurable, and steeper than anyone predicted. On 19 August there were seven compliant kits from one manufacturer and the cheapest was around £583. The register has since passed one hundred entries, and the cheapest is £336 for a single-panel kit at City Plumbing. Every additional entrant has pushed the floor down, and an energy supplier entering is more likely to accelerate that than reverse it.
So my own position, and it is a position rather than advice. If you want the Octopus bundle, the two panel set at £0.71 a watt is fair value and the register question is settled, so the timing risk we flagged last week has gone. Two things still worth doing. Take the two panel bundle over the single: £200 more buys a second 460W panel and drops the cost from £0.98 a watt to £0.71. And check the model code on the box when it arrives, because Octopus prints no model code anywhere on its product pages, which is the one detail a buyer needs in order to do the check everyone tells them to do. If you want to plug something in this month instead, buy from the compliant list and check the code rather than the badge.
Yes. Orders opened on 28 August 2026 at a launch price of £450 for a single JA Solar 460W panel and £650 for two, both including VAT and delivery, with delivery estimated for the end of September. Its device cleared the ENA register on 8 September, so what is being shipped is covered by a compliant entry.
That a device cannot be deemed compliant at this stage, typically because type testing and documentation are still being completed. It is a staging state rather than a rejection. A device has to move to Compliant before it is lawful to connect under the plug-in route.
On the evidence of the register, yes. Octopus filed OCTOQ/21124/V1 and FoxESS filed FOXES/21121/V1 on the same day, both for a model M1-800-E at 0.8 kW single phase.
One hundred and twenty-three kits from twenty-seven manufacturers are listed as Compliant: City Plumbing Supplies and Perlight Solar with twelve each, UKSOL with seven, PatioSun and Zendure with six each, Modular Solar with four, TSUNESS with three, APsystems, EcoFlow, HDM Solar, InstaGroup, Skyworth, The Solar Centre and Thunder Energy with two each, and Octopus Energy, PowerXpress, Segen, The Impact Crowd and VALE GmbH with one each. Only 20 are on sale at a price we have read on the seller's own page. Our register tracker lists them all with model codes.
I check the register regularly and will update this page if the Octopus or FoxESS entries change status. If you spot a change before I do, [email protected].
Sources: ENA G98/G99 Type Test Verification Register, Plug-in Solar device type, checked 9 September 2026; Octopus Energy press release, 28 August 2026, and its single and two panel bundle pages, read 9 September 2026; DESNZ Plug-in Solar Device Interim Product Specification. No commercial relationship with any manufacturer or supplier named on this page. Educational information, not legal or electrical advice.
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