Plug-In Solar Kit Arrived Faulty? Your UK Return and Consumer Rights

With plug-in solar going legal on 27 August 2026, retailers are bracing for the busiest few weeks they've had for this category. B&Q, Currys, Amazon, Screwfix, Wickes and Lidl have all built up stock ahead of the switch-on, and a predictable side effect of any surge in first-time orders is a surge in returns — kits that arrive with a cracked panel, a dead micro-inverter, the wrong bracket set, or a buyer who simply changes their mind once the box is on the doorstep.

Most of what's written about plug-in solar kit ownership focuses on the manufacturer's warranty terms — years of cover for defects and degradation. That's a different, narrower thing from your statutory consumer rights, which apply from the moment you order and don't depend on what the manufacturer's warranty card says. This guide separates the two and walks through exactly what you're entitled to at each stage.

Two separate sets of rights, not one

It's easy to conflate "warranty" with "consumer rights," but they come from different places and work differently:

• The manufacturer's warranty is a voluntary promise from the panel or inverter maker, with its own terms, exclusions and claims process. It typically runs for years, as covered in the warranty guide.
• Your statutory consumer rights come from UK law — mainly the Consumer Rights Act 2015 and the Consumer Contracts Regulations 2013 — and apply regardless of what the warranty card says. They're stronger in the short term and don't require you to deal with the manufacturer at all; your contract is with the retailer you bought from.

If a kit turns up broken, your first call should be the retailer under your statutory rights, not the manufacturer's warranty line. It's faster and the retailer can't point you elsewhere.

The 14-day cooling-off period (even if nothing's wrong)

If you bought your kit online or over the phone — which covers most Amazon, Currys and B&Q orders — the Consumer Contracts Regulations 2013 give you 14 days from delivery to cancel for any reason, including simply changing your mind. You don't need a fault. You get a further 14 days after cancelling to send the item back, and the retailer must refund you within 14 days of receiving it (or proof you've sent it).

Two things catch people out with plug-in solar specifically:

Installing it starts the clock differently. You can open the box and inspect the kit as you would in a shop, but once you've mounted the panels, wired in the micro-inverter and plugged it into a socket, a retailer can deduct an amount from your refund if the use has gone beyond "inspection." A kit that's been drilled to a wall bracket and run for a week generating power is a harder full refund than one still in its packaging.

This right doesn't apply to in-store purchases. If you picked a kit up from a Screwfix or Wickes trade counter rather than ordering it, the 14-day cooling-off right doesn't apply — you're relying on the retailer's own returns policy instead, which is usually shorter and sometimes goodwill-only for non-faulty items.

If the kit is actually faulty

This is where the Consumer Rights Act 2015 does the heavy lifting, and it's considerably stronger than most people assume.

The first 30 days: short-term right to reject. If a plug-in solar kit is faulty — dead on arrival, a cracked panel, an inverter that won't power on, missing the DNO-compliance documentation it should ship with — you have 30 days from delivery to reject it outright and demand a full refund. The retailer cannot insist on a repair or replacement instead; a full reject-and-refund is your call within this window.

Days 31 to six months: one repair or replacement attempt. After 30 days, the retailer gets one attempt to repair or replace the faulty item. If that attempt fails, or the same fault recurs, you can then demand a refund (which can be reduced for the period of use you've had) or a price reduction. Crucially, during this six-month window, the legal assumption is that the fault was present at the point of sale — the retailer has to prove otherwise, not you.

After six months. You still have rights, but the burden of proof flips: you now need to show the fault was present (or developing) at the time of purchase, rather than being reasonable wear or damage you caused. This is where documentation — App generation logs, dated photos, an early support ticket — becomes genuinely useful evidence rather than just a nice-to-have.

Fault vs. non-compliance: know which one you have

Not every disappointing plug-in solar kit is legally "faulty." A panel that generates less than the marketing copy implied on a cloudy day isn't a fault — that's normal variability, covered in the not-generating troubleshooting guide. A genuine fault is something not working as it should: a dead component, a manufacturing defect, damage in transit, or documentation missing that the product needs to legally comply.

That last point matters more than usual right now. With demand this high in the run-up to 27 August, a small number of non-compliant or grey-market kits are already turning up in marketplace listings — units without the correct 800VA/3.5A limiting, missing BS 1363 plug certification, or lacking the paperwork a DNO notification requires. If your kit shows any of these signs, it isn't just a return — read the guide to spotting a non-compliant kit before you do anything else, because reselling or keeping a non-compliant unit carries its own risks beyond a simple refund.

How to make a claim without it dragging on

A little preparation turns a returns dispute into a five-minute phone call:

1. Photograph everything before you touch it — the box, any transit damage, the fault itself, and all included parts laid out. Do this the day it arrives.
2. Keep the original packaging for at least 30 days. Retailers can refuse a return without it, even for a genuine fault, if you can't demonstrate what was actually sent.
3. Note the retailer, not the manufacturer, as your first contact. Your contract is with whoever you paid — Amazon, Currys, B&Q and the rest all have statutory obligations regardless of what the box says about the manufacturer's own process.
4. Use the app's generation data as evidence once installed. If a panel underperforms and you suspect a fault rather than shading or weather, a week of logged output alongside the monthly performance guide benchmark makes a much stronger case than "it feels low."
5. Check the buying checklist against what actually arrived — wattage, plug type, fuse rating and documentation should all match the listing before you even plug it in.

What retailers are doing differently for launch week

Ahead of 27 August, several of the major stockists extended their standard return windows specifically for plug-in solar kits, anticipating the volume of first-time buyers who won't know what "compliant" looks like until they've unboxed it. Policies differ by retailer and can change, so always check the specific returns page for your order rather than relying on a general policy you remember from a different purchase — the retailer stock guide is a good starting point for which stockists carry which kits, but always confirm current returns terms directly with the retailer before you buy if this is a deciding factor for you.

Can I return a plug-in solar kit just because I changed my mind?

Yes, if you bought it online or by phone, under the Consumer Contracts Regulations 2013 you have 14 days from delivery to cancel for any reason. This doesn't apply to in-store purchases, and installing the kit before returning it can reduce your refund.

What if the fault only shows up after I've installed it?

You're still covered. The Consumer Rights Act 2015 gives you 30 days to reject a faulty item outright, and up to six months where the retailer has to prove the fault wasn't present at purchase, not you. Installation doesn't remove this right — it only affects how much can be deducted from a refund for use, and only within the 14-day cooling-off window for non-faulty returns.

Should I contact the manufacturer or the retailer first?

The retailer. Your statutory rights sit with whoever you paid, and they can't redirect a legitimate claim to the manufacturer's warranty process. Use the manufacturer's warranty separately for issues that appear after your statutory return rights have expired.