26 October 2026 · Sun On Tap

Plug-in batteries are coming — here's what you can legally buy today

Two announcements this month show where plug-in solar goes next: batteries in the same box. One of them you can't legally plug in yet — and knowing the difference is worth real money.

Fuse's "Jules": reserve now, plug in… later

UK supplier Fuse Energy has opened reservations for Jules, a plug-in home battery with optional solar panels — up to four 500 W panels feeding a 2.5 kWh battery, managed by software that charges when power is cheap and discharges at peak. The catch is in Fuse's own small print: launch is "currently estimated for 2027" and depends on the UK's position on plug-in home batteries. Panels that push power through a socket became legal on 27 August 2026; a battery that does the same is not yet covered by those rules. Jules is a waitlist, not a product.

Zendure's SolarFlow lands in the UK

Battery-storage brand Zendure has launched its SolarFlow range in the UK, with pre-orders for its 800 W plug-in solar kit opening on 2 November and larger battery systems (from 2.4 kWh, expandable) on sale now — the range starts at £1,099, per Zendure. The same caveat applies: a panels-only plug-in kit must be on the ENA type-test register to be lawful to self-connect, and combined solar-plus-battery boxes sit outside the plug-in specification — so check the exact model, or have it professionally installed.

The rule of thumb for October 2026

Three things are true right now, and they haven't changed since August:

1. Plug-in panels: legal. Up to 800 W through a standard socket, using a registered kit, with a simple notification to your network operator afterwards. Octopus's own plug-in panels have repeatedly sold out — demand is real.

2. Plug-in batteries that charge from a socket: fine today. A battery used as an appliance — charge it on a cheap overnight tariff, run your kit from it at peak prices — needs no paperwork at all. That's exactly how our long-term tested kit earns its keep.

3. Batteries that push power back through the socket: not yet. That's what Fuse is waiting on, and why "coming 2027" is doing a lot of work in this month's headlines.

If you're weighing any of this up, our DIY & plug-in guide has the rules, the register, and a payback calculator that models the 800 W cap honestly.

What to do with this

Sources: Fuse Energy announcement; TechRadar, 19 Oct 2026; Zendure UK launch announcement (SWNS, 15 Oct 2026 — pricing and dates are Zendure's own); Renewable Energy Magazine, 1 Oct 2026. Checked 2026-10-26. We have no relationship with Fuse or Zendure.