Buying a House with Solar Panels

Finding a property with solar panels already installed can seem like a fantastic bargain. You get an energy-efficient home without the hassle of arranging installation yourself. But purchasing a house with existing solar panels comes with specific considerations and potential pitfalls that first-time buyers in particular might overlook.

Whether the solar panels are owned outright or part of a rent-a-roof lease makes an enormous difference to your experience as a new owner. The paperwork required, the warranties that transfer, and your ongoing obligations all depend on who owns the panels and what type of contract covers them.

This guide will walk you through everything you need to know about buying a house with solar panels, from checking ownership to understanding what warranties and benefits you’ll inherit.

Key Takeaways

• Establish whether panels are owned outright or financed through a rent-a-roof lease before making an offer
• Owned panels are an asset that increases property value; leased panels are a liability that complicates sales
• Request all documentation: installation certificates, warranties, MCS registration, and maintenance records
• Feed-in Tariff (FiT) payments may or may not transfer to you depending on the contract and supplier
• Smart Export Guarantee (SEG) payments automatically transfer to your energy supplier account
• Have a qualified surveyor specifically inspect the roof and solar system for damage or defects
• Building and contents insurance should be updated to account for the solar installation
• Leased panels require you to assume the seller’s contract and obligations for the remaining term

Owned Panels vs. Leased Panels: Critical Difference

The most important distinction when buying a house with solar panels is ownership. Understanding this difference will determine whether the panels are a significant asset or a significant liability.

Owned Panels (Purchased Outright)

If the previous owner purchased the solar panels outright, they own them completely. No third party has any claim to the panels or the electricity they generate. When you buy the house, you inherit full ownership of the panels. This is excellent news.

As the new owner, you’ll receive all benefits: the electricity generated for your own use, Smart Export Guarantee payments for surplus electricity, and any remaining warranty period. You can modify the system, add battery storage, or remove panels if needed. Owning panels adds value to the property, typically 5-8% to the property price.

Leased Panels (Rent-a-Roof or Solar Lease)

If a third-party solar company owns the panels under a rent-a-roof or solar lease agreement, the situation is very different. You don’t own the panels; the solar company does. When you purchase the property, you also inherit the lease contract, which typically lasts 20-25 years.

This means you become responsible for monthly payments (if applicable) and all contract obligations. The solar company continues to own the panels and claims all Smart Export Guarantee payments. You benefit from reduced electricity costs because the panels generate electricity, but you don’t capture the SEG income.

Importantly, you’re now locked into the lease for its remaining term. If there are 20 years remaining, you’re committed to 20 more years of payments. When you later want to sell the property, the lease becomes a major complication that prospective buyers will resist.

Checking Ownership and Documentation

Before you make an offer on a property with solar panels, establish ownership. Request the following documents from the seller or their solicitor:

Installation Certificate and Warranty

A legitimate solar installation will have an installation certificate from an MCS-certified installer. This document proves the system was properly installed and complies with Building Regulations. It typically includes a 10-25-year warranty on the panels and 5-10-year warranty on the inverter.

Request a copy of this certificate. Check the date and warranty expiry. If the system was installed in 2005, the panels’ warranty has likely expired, but the panels themselves generally still function effectively.

MCS Registration Certificate

The MCS (Microgeneration Certification Scheme) registration proves the installer was certified at the time of installation. Request this certificate. If the seller doesn’t have it, contact the installer or check www.microgeneration.info to verify the installation was registered.

Feed-in Tariff or Smart Export Guarantee Documentation

If the system was installed before January 2020, it likely receives Feed-in Tariff (FiT) payments under the legacy scheme. These payments are typically paid by a FiT supplier and are fixed for the remaining term of the FiT (which lasts 20-25 years depending on installation date).

Critically, FiT payments do NOT automatically transfer to a new owner. You’ll need to contact the FiT supplier and request a transfer. Some suppliers will transfer without issue; others require the new owner to meet specific criteria or may not allow transfers at all. This is a significant consideration because FiT payments can be worth £200-400 per year.

If the system was installed after January 2020, it operates under the Smart Export Guarantee (SEG) scheme. SEG payments automatically transfer to your energy supplier account when you transfer the property.

Maintenance and Service Records

Request any maintenance or service records. These show whether the system has been regularly inspected and whether any parts have required replacement or repair. A well-maintained system is more likely to continue performing well.

If Leased: The Lease Agreement

If the panels are leased, request a copy of the full lease agreement. This document details your obligations, monthly payments (if any), who’s responsible for maintenance and repairs, what happens if the property is sold, and the process for ending the lease.

Have a solicitor review the lease agreement. Some lease terms are problematic and may require renegotiation with the solar company before you proceed with the purchase.

Understanding Your Rights to Feed-in Tariff Payments

If the property has solar panels installed before January 2020, they likely receive Feed-in Tariff (FiT) payments. This legacy government scheme guaranteed payments for solar electricity generation at fixed rates for 20-25 years.

Current FiT rates are very attractive by today’s standards. Systems installed in 2010-2012 might receive 35-43p per kWh for generation, plus extra for export. Even more recent installations receive 15-20p per kWh. Compared to current Smart Export Guarantee rates of 10-15p per kWh, FiT is significantly more valuable.

However, FiT is paid by a specialist FiT supplier, not your main energy supplier. When you buy the property, the FiT supplier must authorize a transfer to your name. This typically happens automatically, but sometimes the FiT supplier requires information about the property or your circumstances.

Critical warning: Some FiT suppliers have gone out of business or ceased accepting transfers. In 2024, several smaller FiT suppliers ceased operations. This doesn’t eliminate your FiT entitlement, but you may need to switch to a different authorized FiT supplier to claim payments. Always confirm with the FiT supplier that payments will continue after the sale.

The difference between securing FiT transfer and losing it is substantial. A system generating 4,000 kWh per year with an average FiT rate of 20p per kWh means £800 per year in entitlements. That’s £20,000 over the remaining 25-year FiT term. Don’t take transfer for granted; actively confirm it with the FiT supplier.

Building Regulations and Property Surveys

Before purchasing, you should arrange a full survey of the property. Crucially, request that the surveyor specifically inspects the solar panels and roof structure.

What the Surveyor Should Check

The surveyor should visually inspect the panels for damage, degradation, or defects. Look for cracked glass, delamination (separation of panel layers), or signs of water infiltration. Ask the surveyor to check roof condition underneath the panels and verify that the mounting system is securely fixed.

Ask about signs of corrosion on the mounting rails, whether cables appear in good condition, and whether the roof pitch and condition appear sound for another 20+ years of use.

Building Regulations Compliance

Older solar installations (pre-2016) may not have full Building Regulations compliance documentation. If installation certificates are missing, this isn’t necessarily a deal-breaker, but it’s worth noting. The system likely still functions perfectly, but if you ever need to make insurance claims or undertake major roof work, lack of documentation could complicate matters.

If the property requires electrical work near the solar system, ensure any new work is done by a Part P-qualified electrician who can properly integrate the solar system.

Insurance Considerations

Inform your home insurance provider about the solar panels. Some key points:

First, most home insurance policies will cover solar panels without significant premium increases, but you must declare them. Failing to declare the panels could invalidate your policy.

Second, check whether your buildings insurance covers panel damage from storms, impacts, or other incidents. Most standard policies include this, but older policies might not cover solar-specific issues like inverter failure.

Third, if you’re considering a contents insurance policy, note that solar panels are a buildings insurance issue, not contents. Don’t try to cover panels under contents insurance.

Fourth, some insurers offer specific solar panel protection or can recommend specialist solar installers who offer warranty extensions beyond the manufacturer’s warranty. These might be worth exploring for additional peace of mind.

Electricity Supply and SEG or FiT Registration

When you complete the purchase and move into the property, you’ll need to notify your electricity supplier about the solar installation.

If on Smart Export Guarantee (SEG)

Contact your energy supplier and confirm they’re registered to pay SEG rates. Provide your installation details (system size in kWp, MCS registration number, and inverter details). SEG payments will be made monthly or quarterly depending on your supplier.

If on Feed-in Tariff (FiT)

Contact the FiT supplier directly. Request a transfer of the FiT agreement to your name. Provide proof of ownership (like the conveyancing solicitor’s confirmation of completion). The FiT supplier will process the transfer and confirm your ongoing payments.

Meter Details

Confirm your electricity meter details with your supplier. If the property has a smart meter with dual-register (a separate export measurement), ensure your FiT or SEG payments are calculated based on actual export readings, not estimates. This is more accurate and potentially significantly improves your payments.

Case Study: FiT Transfer Complications on Property Purchase

Background

A buyer purchased a property in Lancashire built in 2011 with a 3.5kW solar system installed in 2012 under the Feed-in Tariff scheme. The previous owner received £140 per month in FiT payments at a rate of 43p per kWh (a premium rate for early installations).

Project Overview

The conveyancing solicitors handled the property transfer but didn’t specifically coordinate FiT transfer with the energy supplier. The seller’s FiT supplier was E.on. After completion, the new buyer assumed they’d automatically receive the £140 monthly payments.

Implementation

Six weeks after completion, the new owner noticed no FiT payment had been received. They contacted E.on, who confirmed the FiT account hadn’t been transferred to the new owner’s name. The FiT supplier required proof of ownership and a change of account holder form, which E.on was slow to process.

Results

The transfer took 8 weeks total. During that time, the new owner lost 2 months of FiT payments (£280). E.on didn’t backpay for the missed months. The lesson: don’t assume FiT transfers automatically. Contact the FiT supplier immediately after completing the purchase and actively manage the transfer process. The cost of missing payments is real money lost.

Expert Insights From Our Solar Panel Installers About Inherited Systems

One of our senior solar panel installers with over 19 years of experience notes that inherited systems often surprise new owners. “Many buyers think solar panels just work indefinitely without any attention. In reality, inverters wear out and sometimes need replacement after 10-15 years. If you inherit a system installed in 2010, the inverter might need replacing soon, potentially costing £1,500-3,000. This isn’t a deal-breaker, but it’s something new owners should budget for. Check the inverter age when buying and factor replacement into your decision.”

Another installer emphasises the importance of documentation. “We’ve seen several situations where buyers inherited solar systems without proper installation certificates or warranty documentation. When they later wanted to sell the property, the missing documentation became problematic for prospective buyers. It’s worth insisting on complete documentation from the seller’s solicitors before completing your purchase. If documentation is missing, request the seller provide it or accept a price reduction to cover potential future issues.”

Frequently Asked Questions

Summing Up

Buying a house with existing solar panels can be an excellent investment if the panels are owned outright and properly documented. The panels will save you money on electricity costs and potentially add 5-8% to your property value. However, inherited systems require proper due diligence before purchase.

The critical step is establishing ownership. Owned panels are assets; leased panels are liabilities that complicate your life for decades. Request all documentation, have a surveyor inspect the panels and roof, and actively manage the transfer of any Feed-in Tariff or Smart Export Guarantee benefits.

If you’re uncertain about solar systems or want professional guidance on whether the panels in a property you’re considering are a good deal, our MCS-certified installers can inspect the system and provide expert advice. Contact us for a professional evaluation before completing your purchase.

Updated April 2026