Comparison Guide Β· 2026-07-03
Solar Panel Lease vs Purchase UK 2026
A solar lease (or "rent-a-roof" scheme) lets a third party install and own the panels on your roof for free or low cost, keeping any Smart Export Guarantee payments themselves while you get reduced electricity bills. Buying outright costs several thousand pounds upfront but you keep 100% of the bill savings and export income, with payback typically achieved within 8β12 years.
At a Glance
| Feature | Lease (Rent-a-Roof) | Buy Outright |
|---|---|---|
| Upfront cost | Usually free or low-cost installation | Β£5,000βΒ£10,000+ for a typical 3β4kW residential system |
| Ownership of the panels | Third party owns the panels for the lease term (often 20β25 years) | You own the panels outright from day one |
| Bill savings | Reduced but not eliminated β panel owner may keep some benefit | Full savings on self-consumed electricity are yours |
| Export income (SEG) | Usually goes to the panel-owning company, not you | Yours to claim from an SEG-licensed supplier |
| Impact on selling your home | Can complicate a sale β buyers/lenders may be wary of the lease agreement | Panels are a home improvement, no lease to transfer |
| Maintenance | Usually included in the lease | Your responsibility (though panels need minimal maintenance) |
| Typical payback period | N/A β no capital cost to recover, but savings are smaller | 8β12 years depending on system size, usage and export rates |
When Lease (Rent-a-Roof) Wins
- You cannot afford or do not want to find several thousand pounds upfront
- You are not planning to stay in the property long enough to benefit from ownership payback
- You want solar with no responsibility for maintenance or performance risk
When Buy Outright Wins
- You can afford the upfront cost or finance it via a green loan or mortgage add-on
- You plan to stay in the property long-term and want to maximise total savings
- You want to claim the Smart Export Guarantee income and full bill savings yourself
Frequently Asked Questions
Do solar panel leases affect selling your house?
Yes, potentially β many mortgage lenders are cautious about properties with solar lease agreements attached, because the arrangement is registered against the property and can complicate the legal conveyancing process and mortgage valuation for a buyer. Always check the specific lease terms and whether they are transferable before signing.
How long does it take to pay back solar panels bought outright?
For a typical UK home with a well-sized system, payback is commonly 8β12 years through a combination of reduced electricity bills (self-consumption) and Smart Export Guarantee payments for excess electricity sold back to the grid, after which all savings are pure benefit for the remaining 15+ years of the panels' working life.
Is VAT charged on solar panels in the UK?
No β installing solar panels (along with battery storage and other qualifying energy-saving materials) in residential accommodation is zero-rated for VAT in Great Britain, which removes a significant cost that previously applied at the reduced 5% rate.
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What is the Smart Export Guarantee (SEG)?
The SEG requires larger electricity suppliers to offer a tariff paying homeowners for surplus renewable electricity exported back to the grid, at a rate set by each supplier (rates vary, so shopping around for your export tariff separately from your import tariff can increase income significantly).
Can I add a battery later if I only buy solar panels now?
Yes β most modern solar installations are designed to be battery-compatible, so you can add a home battery storage system later to store excess daytime generation for evening use, further increasing self-consumption and reducing reliance on grid electricity, though it is often cheaper to install both together.
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Disclaimer: This comparison is general information, not personal financial advice. Figures reflect the 2026/27 UK tax year and can change. Always check current HMRC/gov.uk guidance or speak to a regulated adviser before making a decision.