Buying a House With Solar Panels: What to Check Before You Exchange
A house with solar panels is usually a better buy, free electricity from day one of ownership, but one question towers over every other check: does the seller own the panels outright, or does a rent-a-roof company own them under a lease on the roof? Owned panels transfer with the house along with their warranties and export earnings. Leased panels come with a decades-long contract you inherit, and your conveyancer needs to see it before you commit. Get that answered first; everything else on the checklist is routine paperwork.
In This Guide
The ownership question
UK homes acquired solar by two very different routes, and the difference decides how careful you need to be:
| Arrangement | What it means for you as buyer |
|---|---|
| Owner-purchased | The panels are part of the house, like the boiler. They transfer with the sale, warranties and all. The overwhelming majority of systems, and the easy case |
| Rent-a-roof lease | A company owns the panels and holds a lease, often 20 to 25 years, on the roof itself. You inherit the lease, its terms and its restrictions, and some mortgage lenders take a hard look at it |
Ask the direct question early, "do you own the panels outright?", and have your conveyancer verify the answer against the title, because roof leases are registered against it. Leased systems are not automatically deal-breakers; free-ish electricity for the lease term has value, but the terms vary enormously, and the awkward ones complicate remortgaging, roof repairs and future extensions. If a lease surfaces, our free-panels guide explains how these schemes worked and what the contracts typically contain.
The paperwork to demand
Ask the seller for all of it, before exchange
- The MCS certificateProof of certified installation, and the key to export payments in your name later.
- Electrical certificationThe installation's electrical sign-off from commissioning.
- DNO notification or approvalEvidence the system is registered with the network operator.
- Warranty documentsPanels, inverter and any battery, plus any insurance-backed workmanship guarantee.
- The handover pack and manualsIncluding monitoring app details you will want transferred.
- Service and repair historyInformal but telling, like a car's.
Sellers with a well-run system produce this in a day. Blank looks are information too, though missing paperwork is usually recoverable, certificates can be reissued and systems inspected, so treat gaps as a negotiating point rather than a veto.
FiT, SEG and what transfers
The earnings side depends on the system's vintage. Systems installed before April 2019 may carry Feed-in Tariff payments, and these genuinely transfer: the FiT accreditation belongs to the installation, and the new owner takes over the payments by completing the licensee's change-of-ownership process. On older, generously-rated FiT systems that income is real money, worth confirming the rate and remaining term during the purchase. Newer systems earn through the Smart Export Guarantee instead, and SEG does not transfer as such: you simply apply to an export tariff in your own name after completion, using the MCS certificate from the paperwork above, the process our selling-back guide walks through. Either way, the seller's meter readings at completion keep everyone's sums clean.
Judging the system's condition
- Age tells you the inverter's futurePanels last 25-plus years; inverters typically 10 to 15, so a 12-year-old system likely has a replacement in its near future, priced in our inverter lifespan guide. A fair negotiating point, not a reason to walk.
- Ask for generation dataA year of monitoring output, or FiT/SEG statements, shows the system actually performs. Healthy history beats any visual inspection.
- Look for the obviousCracked glass, slipped panels, heavy bird activity under the array (our bird-proofing guide covers that fix), visible cable sag.
- Commission a system inspection if in doubtAny MCS installer can survey the system like a mechanic checks a used car; for a system adding thousands to a purchase, it is cheap certainty.
After you move in
Four quick jobs in the first month: apply for an export tariff in your name (or complete the FiT transfer), get the monitoring app moved to your account, tell your home insurer the panels exist, and file the paperwork somewhere you can find it, future-you selling the house will be grateful, as our selling guide explains from the other side of the table. If the system arrives with no paperwork at all, an inspection visit can reconstruct most of it and get the export earnings flowing anyway.
Inherited a system and want it checked?
We inspect, service and get inherited solar systems earning properly, whoever installed them, across the East Midlands. Call 0115 773 7575, 8am to 8pm, Monday to Friday.
Maintenance and supportFrequently asked questions
Is buying a house with solar panels a good idea?
Usually yes: you inherit lower electricity bills and export earnings from day one without paying for the installation. The one arrangement to scrutinise is a rent-a-roof lease, where a company owns the panels and holds a long lease on the roof; have your conveyancer review the terms before exchange.
Do solar panel warranties transfer to a new owner?
Manufacturer warranties on panels, inverter and battery generally stay with the installation, though some brands ask for a transfer registration. Insurance-backed workmanship guarantees commonly transfer too. Collect all the documents from the seller and check each one's transfer terms; it is minutes of admin protecting years of cover.
Does the Feed-in Tariff transfer when I buy the house?
Yes. FiT accreditation belongs to the installation, and payments move to you through the FiT licensee's change-of-ownership process, with meter readings taken at completion. On pre-2019 systems with good rates this is genuine income, so confirm the rate and remaining term during the purchase.
What if the seller has no solar paperwork?
Recoverable, usually: MCS certificates can be looked up and reissued, an inspection can certify the installation's condition, and export payments can still be set up. Treat missing paperwork as a negotiating point and budget for an inspection visit rather than walking away from an otherwise good house.
Do solar panels cause mortgage problems for buyers?
Owner-owned panels, no, lenders treat them as part of the house. Rent-a-roof leases are the complication: lenders scrutinise lease terms, and older, badly drafted ones can slow things down. Flag a leased system to your conveyancer and lender early so it is handled inside the normal timeline.
Related reading
- Selling a house with solar panels
- Do solar panels increase home value?
- Free solar panels: the truth
- Selling electricity back to the grid
- How long do solar inverters last?
Straight answers on any system
We are Spectrum Energy Systems, MCS certified (NIC200223), inspecting and servicing solar across the East Midlands since 2011, including pre-purchase system checks. Call 0115 773 7575, 8am to 8pm, Monday to Friday.
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