Plug-In Solar on Finance: 0% Deals and Buy Now Pay Later in the UK

Plug-in solar kits sit in an odd price bracket. At anywhere from roughly £300 for a basic single-panel setup to £600–900 for a dual-panel EcoFlow STREAM kit, they're too expensive for most people to treat as an impulse buy, but too cheap to justify a personal loan or the kind of finance package that comes with a full rooftop solar installation. That gap is exactly where "can I pay monthly?" questions come from, and since this is a brand-new product category, the answer isn't as settled as it is for, say, a new sofa or a laptop.

Here's what's actually available right now, what to watch out for, and when paying in full is simply the better option.

Why plug-in solar finance looks different to rooftop solar finance

Full rooftop solar installations in the UK have run on finance for years — typically a loan of several thousand pounds over five to ten years, secured against the expected savings and often arranged through the installer via a regulated credit broker. None of that infrastructure exists yet for plug-in solar, because the product itself has only been legal since 27 August 2026. There's no installer relationship to route finance through — you're buying a consumer electronics product from a retailer or manufacturer, most likely B&Q, Currys, Amazon, Screwfix, Wickes or Lidl — so the finance options that apply are the same ones that apply to buying a washing machine or a laptop from the same shops, not bespoke solar lending.

That's not necessarily a bad thing. It means the terms are usually simpler and shorter, but it also means the interest rates can be considerably higher if you don't specifically pick a 0% or low-APR option.

The main ways to spread the cost

Retailer 0% finance. Currys, in particular, has long offered 0% interest credit on electronics purchases over a set threshold (commonly £99–£100), spread over anywhere from a few months to a couple of years depending on the basket value. Because plug-in solar kits from EcoFlow and others typically clear that threshold comfortably, a STREAM kit bought through Currys' own checkout may qualify for the same 0% instalment plans as a TV or a fridge-freezer. The application happens at checkout and is a straightforward credit check — approval isn't guaranteed, and it's a genuine credit agreement that will show on your credit file, but there's no interest to pay if you keep to the schedule.

Buy now pay later (BNPL) providers. Klarna and Clearpay are integrated into checkout at Amazon (via Klarna in some categories) and a growing number of independent retailers. These typically split the cost into three or four instalments over six to twelve weeks, interest-free, with no formal credit check for the shortest plans (though longer BNPL products increasingly do run checks following FCA regulation changes). BNPL suits someone who wants to spread a £600 kit over two months rather than finance a purchase over a year, but it's not designed for — and won't be offered on — longer terms.

Manufacturer finance via EcoFlow. EcoFlow's own UK site has, on occasion, run instalment options through third-party checkout finance providers, similar to the retailer model above. Terms change with promotions, so it's worth checking the EcoFlow UK site directly at the time you're ready to buy rather than assuming a specific plan will still be live.

Store credit cards. Some UK retailers issue their own branded credit cards with promotional 0% periods on purchases. If you already hold one, or plan to apply anyway, this can work out identically to retailer finance — but a new credit card application is a bigger commitment (and a harder credit search) than a single-purchase instalment plan, so it's rarely worth opening one purely to spread the cost of a solar kit.

Do the maths before you commit to any instalment plan

A genuine 0% plan costs you nothing extra as long as you pay every instalment on time, so the only real question is whether you can comfortably meet the schedule. Where it gets worse than paying upfront is if you slip into a non-promotional APR — some retailer finance defaults to a standard interest rate (often 20%+ APR) if a 0% promotional period lapses or if you don't clear the balance within the stated window, which can turn a £600 kit into a much more expensive purchase over time.

It's also worth weighing finance against the payback timeline itself. Our plug-in solar payback calculator generally puts break-even for an 800W kit at somewhere in the low-to-mid single-digit years, depending on your usage pattern and the current Ofgem price cap of around 24.5p/kWh. If a 0% plan lets you start generating and saving immediately rather than waiting to save up the full amount, the finance effectively pays for itself out of the electricity you're no longer buying — provided you're not paying interest on top.

Alternatives to consumer finance

If retailer credit or BNPL doesn't suit you, there are a couple of other routes worth checking before you rule out plug-in solar on cost grounds alone:

• The government's low-income pilot. A £25 million government pilot exists specifically to help lower-income households access plug-in solar kits, and may cover some or all of the upfront cost for eligible applicants — worth checking before taking on any finance agreement.
• Universal Credit and benefit-linked support. Some support routes tied to existing benefits are covered in our plug-in solar and Universal Credit guide, which is worth reading alongside the pilot scheme above.
• Buying a cheaper compliant kit outright. Our cheapest plug-in solar kits guide rounds up compliant single-panel options that may bring the total low enough to avoid needing finance at all.
• Waiting for a sales event. If you're not in a rush, our Black Friday buying guide looks at whether prices are likely to drop enough to make waiting worthwhile.

What to check before you sign anything

Whichever option you're considering, run through this before you commit:

• Confirm the APR in writing, not just "0% available" marketing copy — ask specifically what rate applies if you miss a payment or don't clear the balance within a promotional window.
• Check the kit is genuinely compliant before financing it. A cut-price or unbranded kit that doesn't meet the 800VA/3.5A, BS 1363 plug, 5A fuse and no-battery-in-circuit spec isn't a bargain at any monthly rate — see our guide to spotting a non-compliant kit first.
• Read the full buying checklist so the finance decision doesn't distract from making sure the kit itself is the right fit for your property.
• Only borrow what you'd have bought anyway. Interest-free finance is a way to smooth a purchase you were already going to make, not a reason to buy a bigger or pricier kit than your property needs.

Can you get a personal loan specifically for plug-in solar?

There's no dedicated "plug-in solar loan" product on the UK market yet, since the category is too new and the purchase amounts too small for most lenders to have built a specific offering. A general-purpose personal loan is possible but rarely makes sense for a sub-£1,000 purchase compared with 0% retailer finance or BNPL.

Does using buy now pay later affect my credit score?

Shorter BNPL plans (paid over weeks) often don't run a hard credit check, though this is changing as BNPL comes under tighter FCA regulation. Longer instalment plans and retailer credit typically do involve a credit search and will appear on your credit file, so treat them like any other credit agreement.

Is it better to save up or use 0% finance for a plug-in solar kit?

If the finance is genuinely 0% and you're confident you can meet every payment, spreading the cost costs you nothing extra and lets you start generating — and saving on bills — sooner. If there's any real APR involved, or you're not confident about the payment schedule, saving up and buying outright avoids the risk entirely.