Find out where used solar panels stack up
Thinking about installing solar panels on your home and wondering if buying them second-hand makes sense, or do you have an off-grid project and need cheap power? For the first, they make little sense, as you’ll lose the valuable SEG payments; for the second, they can work if the price is right.
Let’s see how much they cost, where to buy them and more below.
- Used panels are cheap, but supply price is only part of the cost. Expect roughly £20 to £95 per panel second-hand, against £150 to £250 for a new panel bought inside a full install. Labour, scaffolding and wiring do not fall just because the panels did.
- You almost certainly lose Smart Export Guarantee income on a home system. SEG payments need MCS (or Flexi-Orb) certification, and MCS-registered installers will not certify a system built from used, delisted or untraceable panels.
- Used and refurbished are not the same thing. Used means sold as-is with no testing. Refurbished means tested, repaired and sometimes recertified. Paying a little more for tested stock removes most of the guesswork.
- Off-grid is where used panels sometimes earn their keep. A shed, workshop, greenhouse, caravan or boat needs no MCS sign-off and no grid notification, so the risks shrink and the low price can make it work.
- Price is critical. A new panel will last longer, produce more power and is often not that much more expensive. A good new 450W panel on its own (not part of an install) can cost only £70 plus VAT. So the second-hand panel you see for £50 might be a net worse deal.
- Inspect before money changes hands. Get the age, the original datasheet and any warranty transfer terms in writing, and ideally an electroluminescence scan to catch hidden micro-cracks a photo will never show.
- What counts as a used solar panel
- What used solar panels cost in 2026
- The hidden costs that erase the saving
- The MCS and SEG catch
- Degradation: a panel part-way through its life
- Warranty, VAT, insurance and grid rules
- When used panels make sense
- Where to buy in the UK, rated
- How to inspect before you buy
- Refurbished vs used vs new
What counts as a used solar panel
A used solar panel covers a wide range of products, but it’s any photovoltaic module that has been owned before, whether it spent a decade on a roof or was taken out of the box and never fitted. Most second-hand stock in the UK comes from three places: homeowners upgrading to newer, higher-output panels; commercial sites being re-fitted; and clearance or ex-display units. Provenance varies listing to listing, so treat each one on its own merits rather than assuming a grading standard.
The distinction that trips buyers up is used against refurbished.
- Used (as-is)
- Removed from a previous system and sold with no testing or repair. Cheapest, and highest risk. What you see in the photo is all the assurance you get.
- Refurbished
- Previously used, then tested, cleaned and repaired where needed, sometimes with a short reseller warranty. Costs more than raw used stock but removes much of the guesswork.
- Reclaimed / decommissioned
- Bulk stock pulled from commercial arrays or solar farms, usually sold in pallet or container lots (500+ units) for large off-grid or export projects rather than single homes.
What used solar panels cost in 2026
Pricing on the second-hand market is wide and inconsistent. eBay listings run from about £11 to over £500 per panel depending on wattage, age and condition, averaging around £95; other UK consumer guides put the typical Gumtree and eBay band at £50 to £70. Measured by output, used panels tend to land between £0.10 and £0.30 per watt, against new panels that sit inside a full install at roughly £150 to £250 each (and £70-£120 panel-only). The headline saving per panel looks worthy of investigation. What it hides is everything around the panel.
| Panel type | Typical used price | Per watt | Best suited to |
|---|---|---|---|
| Small 12V / portable (50-150W) | £15-£60 | £0.30-£0.50 | Camping, caravans, boats |
| Older domestic (250-300W) | £20-£70 | £0.10-£0.25 | Sheds, workshops, ex-FiT stock |
| Modern domestic (350-450W) | £60-£120 | £0.18-£0.30 | Larger off-grid builds |
| Refurbished, tested (any) | +30-50% vs used | Higher | Buyers who want reassurance |
| New panel (inside a full install) | £150-£250 | £0.35-£0.55 | Grid-tied homes claiming SEG |
The hidden costs that erase the saving
Cheap panels do not mean a cheap system. The panels are one of the least expensive parts of any install. Scaffolding, mounting, DC cabling, isolators, an inverter and a qualified electrician all cost the same whether the glass on your roof is new or fifteen years old. Here is what a modest self-build using used panels looks like once everything is added up.
Against that, a fully installed 4kW system from an accredited firm runs from roughly £5,000 to £7,000, certified, warrantied and eligible for export payments. The used route saves perhaps £1,500 to £2,500 up front, then gives back much of it over the years in lost export income, thinner warranty cover and a higher chance of early replacement. For context on the new-system side, see our full breakdown of how much solar panels cost in the UK.
The MCS and SEG catch
This is the single biggest reason used panels rarely stack up for a home. The Smart Export Guarantee pays you for surplus electricity sent to the grid, and for many households that is worth several hundred pounds a year. To claim it, your system must be certified under MCS or the Flexi-Orb equivalent.
MCS certification requires every module to be a currently listed product on the MCS Product Directory, installed by an accredited firm. In practice, MCS installers will not put their accreditation behind used, delisted or unverifiable panels, because they cannot trace the equipment’s history. The result is blunt: build a grid-tied home system from second-hand panels and you should assume no export income, ever, unless you find and pay an installer willing to certify the specific equipment. That is rare, and worth getting in writing before you buy anything.
Self-installing your own panels also rules out SEG on its own. Without MCS or Flexi-Orb certification, a home system you fit yourself cannot be registered for export payments, however new the panels are. The certification, not the age of the glass, is what unlocks the income.
Degradation: a panel part-way through its life
Every solar panel loses a little output each year, and a used one has already burned through years of that curve before it reaches you. How much depends on the generation of the cell. Current N-type panels degrade slowly and carry long guarantees. The older P-type modules most likely to appear second-hand from a ten to fifteen year old roof lose ground faster. If you want the full picture, read our guide to how efficient solar panels really are.
| Panel generation | Annual loss | Output guarantee | Likely state used |
|---|---|---|---|
| New N-type (2023 onward) | ~0.4%/yr | ~87% at 30 yrs | Rarely sold used yet |
| P-type (2014-2020) | 0.5-0.7%/yr | 80-84% at 25 yrs | A 10-yr panel near 90% |
| Older P-type (pre-2014) | 0.7-1.0%/yr | 80% at 25 yrs | Often below 85% |
The practical takeaway: a twelve year old panel under an older warranty curve could already be sitting at 90% or less of its original rating before you connect it. That is not automatically a dealbreaker for a cheap off-grid build, but it should shape what you are willing to pay per watt. A 350W panel that now realistically produces 300W should be priced as a 300W panel.
Warranty, VAT, insurance and grid rules
Beyond output, four practical points decide whether a used purchase is safe and legal.
Warranties rarely travel
Manufacturer product and performance warranties do not automatically pass to a new owner or a new roof. Transfer terms vary by brand, and many exclude panels that have been removed and reinstalled elsewhere. Ask for the original warranty document and the transfer policy before buying. If you cannot get either, assume there is no cover left at all.
The 0% VAT rate on energy-saving materials, in place until 31 March 2027, applies to a business supplying and installing the kit. It was never available for pure DIY self-installation, new panels or used. If you are fitting used panels yourself to save money, do not factor in a VAT saving that was never on the table.
Insurance can hinge on certification
Your buildings insurer may expect any roof-mounted electrical system to be professionally installed and, where relevant, certified. An uncertified self-build using untraceable panels could complicate a future claim. A quick call to confirm your policy covers the setup is worth the five minutes.
Grid notification still applies
Connection rules do not care whether panels are new or used. A single-phase system up to 3.68kW needs G98 notification to your network operator, and larger or three-phase systems need G99 pre-approval before switch-on. This is based on the inverter’s capacity, not the panels, so buying cheap glass does not make it optional. Our DNO application guide walks through the process.
Panels must also meet the Electricity Safety, Quality and Continuity Regulations (ESQCR) and be fitted to the wiring regulations. A qualified electrician should inspect any used module for cell damage, delamination or perished cabling before it goes anywhere near your consumer unit.
When used panels make sense, and when they don’t
The maths flips entirely once export income stops being the point. Off-grid, a used panel wired into a shed, workshop, greenhouse, caravan or boat needs no MCS certification and no grid notification, so degradation and warranty gaps matter far less against a rock-bottom price. On a grid-tied home you plan to claim export from, the calculation nearly always favours new.
An off-grid setup where SEG and MCS are irrelevant, such as a shed, allotment, caravan or narrowboat.
Low-stakes projects where a failed panel is an inconvenience, not a financial loss.
Buyers who can test panels or pay for refurbished, tested stock with a short warranty.
Cutting landfill and embodied carbon by keeping working panels in service longer.
A grid-connected home where you want Smart Export Guarantee income. No certification, no payments.
Anyone relying on the manufacturer warranty for long-term peace of mind.
A roof where aesthetics matter. Mismatched panels look patchy from the ground.
Buyers hoping to claim 0% VAT or a grant, neither of which applies to DIY used builds.
Where to buy used solar panels in the UK, rated
There is no single trusted marketplace for second-hand panels, so where you buy shapes both the price and the risk. We rated the main routes out of five on choice, price, buyer protection and quality assurance. Higher overall scores mean a safer purchase, not always the cheapest one.
| Source | Choice | Price | Protection | Quality | Overall |
|---|---|---|---|---|---|
| eBay | 4.5 | 3.5 | 4.0 | 2.5 | 3.6 |
| Specialist refurbisher | 3.0 | 2.5 | 4.0 | 4.5 | 3.5 |
| Facebook Marketplace | 4.0 | 4.5 | 1.5 | 2.0 | 3.0 |
| Gumtree | 3.0 | 4.5 | 1.5 | 2.0 | 2.8 |
| Bulk reclaimer (pallet) | 2.5 | 4.5 | 3.0 | 3.0 | 3.3 |
eBay
The widest choice and the only route with meaningful buyer protection through its money-back guarantee. You can filter by location to avoid shipping heavy glass across the country. Quality is still pot luck, so lean on seller ratings and detailed photos, and message the seller for the datasheet before bidding.
Specialist refurbishers
A growing number of UK sellers now test and recondition panels before sale, some offering a short warranty. You pay more than raw marketplace stock and choice is narrower, but the reassurance is worth it if you cannot test panels yourself. This is the sensible middle ground for most off-grid buyers.
Facebook Marketplace and Gumtree
The cheapest headline prices and the highest risk. Deals are local, cash-based and sold as-seen with no recourse if a panel is faulty. Fine for a low-value off-grid project where you can inspect in person, poor for anything you are relying on.
Bulk reclaimers
Pallet and container lots of 500+ decommissioned commercial panels, aimed at solar farms and large off-grid projects rather than single homes. Excellent per-watt value at scale, but overkill unless you are kitting out a smallholding or community build.
How to inspect a panel before you buy
Whether you are meeting a seller in a car park or opening a refurbished delivery, the same checks separate a bargain from a liability. Work through this before money changes hands.
- Get the age and original install date in writing. This sets how much output should realistically remain.
- Ask for the original manufacturer datasheet. No datasheet means you cannot verify the wattage, voltage or efficiency claims.
- Confirm warranty status and transfer terms. If neither is available, price the panel as if it has no cover.
- Inspect the glass, frame and backsheet. Look for cracks, cloudy patches (delamination), scorch marks, corrosion and perished cabling.
- Check the junction box and MC4 connectors. Loose, brittle or water-damaged connectors are a fire risk and a common reason panels get sold on.
- For grid-tied plans, get written installer sign-off first. Confirm an MCS firm will certify the finished system before you commit to buying.
The faults that matter most are the ones you cannot see. Hidden micro-cracks in aged cells are invisible to the naked eye but a known cause of hotspots and premature failure. Some refurbishers run electroluminescence (EL) scans that photograph these cracks. If you are buying more than a couple of panels, sourcing EL-tested stock is the single best way to avoid a dud.
Refurbished vs used vs new: the quick verdict
If you strip it back to three columns, the trade-off is clear. Used wins on price alone. New wins on income, warranty and peace of mind. Refurbished sits in between and is the best fit for most off-grid buyers who want a bargain without a gamble.
- Testing
- None
- Warranty
- Usually none
- SEG eligible
- No
- Best for
- Low-stakes off-grid
- Testing
- Yes, sometimes EL
- Warranty
- Short reseller cover
- SEG eligible
- No
- Best for
- Most off-grid builds
- Testing
- Factory-fresh
- Warranty
- 25-30 yrs
- SEG eligible
- Yes
- Best for
- Grid-tied homes
Are used solar panels worth it in the UK?
It depends on the use case. For an off-grid shed, caravan or greenhouse where export income and certification are irrelevant, used panels can be a real bargain. For a grid-connected home, older panels are already years into their decline and usually cannot be MCS-certified for export payments, so new panels tend to win overall.
Can you get SEG payments with used solar panels?
Rarely. Export payments need MCS or Flexi-Orb certification, and accredited installers generally will not certify a system built from used or untraceable panels. Assume no export income unless an installer confirms in writing that they will certify the finished system.
How much do used solar panels cost?
Prices range widely, from around £11 to over £500 per panel, averaging roughly £95, with older domestic panels often £20 to £70. Refurbished, tested panels cost 30 to 50% more than as-is stock. Compare that against £150 to £250 per panel bought inside a new install.
Do solar panel warranties transfer to a second owner?
It depends on the manufacturer. Some allow transfer with written notice, others exclude panels removed and refitted at a different property. Always ask for the original warranty document and the transfer policy. If neither is available, assume there is no cover left.
Do you still need DNO notification for used panels?
Yes. G98 notification (up to 3.68kW single-phase) or G99 pre-approval (larger systems) is based on the inverter’s connection capacity, not the age of the panels, so the requirement applies regardless of where the panels came from.
Cheap glass, expensive lesson, unless you are off-grid
Correctly priced used solar panels are one of the best-value ways to power a shed, caravan, boat or allotment, where nobody is checking for certification and a low price is the whole point. Buy tested or refurbished stock, price each panel on the output it has left rather than its original rating, and inspect before you pay.
For a grid-connected home, the picture changes. The loss of Smart Export Guarantee income, the thin warranty cover and the labour costs that do not fall with the panels usually leave you worse off than a certified new system, especially with 0% finance now bringing new installs within reach.
Ask yourself one question before buying: will these panels ever need certifying for the grid? If yes, buy new. If no, the second-hand market is your friend.
METHODOLOGY: Pricing reflects UK marketplace and refurbisher listings reviewed in September 2026. Source ratings are Solar Love editorial assessments scored on choice, price, buyer protection and quality assurance.
DISCLAIMER: All prices are indicative and vary by region, condition and access. This guide is general information, not financial or legal advice. Have any used panel inspected by a qualified electrician before installation, and confirm certification requirements with an MCS-registered installer.
UPDATED: 8 October 2026. Reflects the 0% VAT window through 31 March 2027 and current SEG certification requirements.
