Black Friday 2026: Should You Wait to Buy Plug-In Solar?

Plug-in solar has been legal in the UK for less than three weeks, and already the question landing in our inbox has shifted from "is this legal?" to "should I wait for Black Friday?" It's a fair question. Amazon's Prime Big Deal Days usually lands in mid-October, Black Friday falls on the last Friday of November, and Cyber Monday follows straight after — three separate discounting events between now and the shortest day of the year. For a brand-new product category with retailers still working out how aggressively to price it, that's a lot of potential ways to save. It's also a lot of potential ways to end up with a kit that doesn't meet the SI 2026 No. 848 spec, bought in a rush during a flash sale.

Why this Black Friday is different for plug-in solar

Every previous UK Black Friday, plug-in solar simply wasn't a category — it was illegal to install a grid-connected microgenerator without going through the full MCS/G98 process. This year, retailers including B&Q, Currys, Amazon, Screwfix, Wickes and Lidl are stocking compliant kits for the first time, off the back of a five-week head start since the law changed. Nobody outside those retailers' own buying teams really knows yet how deep the discounts will go, because there's no prior Black Friday pricing data for this product to compare against. That cuts both ways: discounts could be generous as retailers compete to establish market share in a new category, or they could be modest because demand is already outstripping the limited early supply of EcoFlow STREAM units and other compliant kits.

What is predictable is retailer behaviour in general. Stock clearance of older accessories (mounting brackets, cables, monitoring plugs) tends to see the deepest cuts, while the headline kits — the actual panel-and-inverter bundles — usually see smaller percentage discounts because margins are already tight on a new, in-demand product.

The three sales events to watch

Amazon Prime Big Deal Days (mid-October). Amazon exclusive, requires Prime membership, typically two days. Given plug-in solar only became legal in late August, this will be the first real test of how Amazon prices the category. Worth checking, but don't expect the biggest discounts of the year here — retailers usually save their sharpest cuts for Black Friday itself.

Black Friday (27 November 2026). The main event, and the one most likely to include EcoFlow's own site alongside the high street and online retailers listed in our retailer stocking guide. Check the EcoFlow UK sale page closer to the date, since manufacturer-direct sales often undercut retailer pricing on bundles.

Cyber Monday (30 November 2026). Historically stronger for accessories and smaller electricals than for big-ticket items, but worth a look if you're topping up an existing system with an extra panel, monitoring plug or cable rather than buying a full kit.

The case for waiting

If your roof or garden won't be sun-exposed again until spring anyway — a north-facing balcony, a garden that's shaded through winter, or a flat roof that gets minimal low-angle winter sun — there's a genuine argument for waiting. You lose very little generation by installing in December instead of September, since UK output in winter is a fraction of summer levels regardless. If a kit is likely to be £50–100 cheaper by Black Friday and you weren't going to see meaningful output before then anyway, waiting costs you almost nothing.

There's also a decent chance that competition increases kit choice over the next two months. More manufacturers are expected to bring compliant kits to market as the interim product specification beds in, which historically pushes prices down and choice up.

The case for buying now

If your setup gets good sun and you can start generating in September or October, every week you wait is a week of free electricity you don't capture — and at the current Ofgem price cap of around 24.5p/kWh, that adds up faster than people expect even in shoulder-season sun. There's also a supply argument: early demand for EcoFlow STREAM kits has been strong since the September UK launch, and a new, popular product category going into its first Black Friday can just as easily see stock shortages as discounts. If you wait specifically for a sale and the kit you want sells out before you order, you've lost both the early generation and the deal.

How to actually judge whether a "deal" is real

New product categories attract opportunistic pricing during sales events — a "was £999, now £799" sticker means little if the item never actually sold at £999. A few checks before you click buy:

• Track the price, don't trust the sticker. Third-party price-history tools work for Amazon listings and can show you whether a "deal" price has actually been standard for weeks.
• Compare across retailers on the same day. Our B&Q vs Screwfix vs Currys vs Wickes comparison is worth revisiting close to Black Friday, since the cheapest retailer for plug-in solar kits has shifted more than once since launch.
• Never let a discount override the compliance check. A cut-price kit that isn't genuinely compliant with the 800VA/3.5A, BS 1363 plug, 5A fuse, no-battery-in-circuit spec isn't a bargain — it's a returns headache and potentially a safety and insurance problem. Run anything unfamiliar past our guide to spotting a non-compliant kit before you buy, sale or no sale.
• Check what's actually in the box. Some "deal" bundles strip out the mounting brackets or extension cable to hit a lower headline price. Cross-reference against our buying checklist so you're not paying separately for parts you assumed were included.

If you're buying as a gift or for winter prep

Some buyers are timing a Black Friday purchase deliberately, planning to install ahead of spring rather than trying to catch autumn sun. If that's you, pair your purchase with our winter preparation guide so the kit is mounted, weatherproofed and ready to go the moment daylight lengthens again in March, rather than sitting in a box until the sun.

Will plug-in solar kits definitely be discounted on Black Friday 2026?

Not guaranteed. It's a new category with no pricing history, so while retailers competing for early market share makes some discounting likely, high demand and limited stock could keep prices firmer than in more established electronics categories.

Is it worth waiting until Black Friday if my garden gets good winter sun?

Probably not. If you can generate meaningful output through autumn and early winter, the electricity you'd capture by buying now likely outweighs a modest Black Friday saving. Waiting makes more sense if your site is shaded or north-facing until spring anyway.

Should I buy from EcoFlow direct or a retailer during the sales period?

Check both. Manufacturer-direct sales sometimes beat retailer pricing on bundles, but retailers occasionally throw in extras like extended returns windows. Compare the EcoFlow UK sale page against listings from B&Q, Currys, Screwfix and Wickes on the same day before ordering.