It’s the first question almost everyone asks, and it’s also the hardest one to answer honestly with a single number. Search for solar panel costs online and you’ll find plenty of average figures, but the truth is that no two homes cost the same to fit out properly. A three-bed semi in Chineham with a simple south-facing roof is a very different job to a period property in Old Basing with a complicated roofline and limited access.
Rather than throw a misleading average at you, it’s more useful to explain what actually goes into building up the cost of a solar installation, so you know what you’re really paying for, and why it matters just as much who does the work as what it costs.
Your roof shapes almost everything
The single biggest factor in any solar quote is your roof itself. Pitch, orientation, and shading all affect how many panels you can fit and how much they’ll generate, which in turn affects the size of system that makes sense for your household.
Roof access matters too. A straightforward pitched roof with easy scaffold access is a quicker, simpler job than a steep roof, a flat roof, or one with dormers and chimneys to work around. Older properties around Basingstoke, particularly in villages like Sherborne St John and Oakley, sometimes come with slate roofs, unusual roof shapes, or conservation considerations that need to be factored in from the outset rather than discovered halfway through a job. From August 2025, flat-roof mounting systems in the UK also have to be MCS 012-approved, which adds a layer of technical requirement that a straightforward pitched roof doesn’t need.
The equipment you choose changes the price
Panels themselves vary in efficiency, output, and the length of warranty they carry, and the inverter you choose matters just as much. A single string inverter is usually the simpler, more cost-effective option for a roof with one orientation and no significant shading. If parts of your roof are shaded at different times of day, perhaps by a chimney, a neighbouring tree, or a dormer window, power optimisers or micro-inverters fitted to individual panels often perform noticeably better, at extra cost.
Adding battery storage to the system is another significant variable, and it’s a decision worth making based on how your household actually uses electricity day to day, not just because it sounds like a good idea. A household that’s out at work all day has very different needs to one with someone home most of the time, and a good installer will talk you through that rather than assuming one size fits all.
Why a qualified, insured electrician matters as much as the equipment
It’s tempting to compare quotes purely on the bottom line, but who actually carries out the work matters enormously, and not just for the quality of the finish. Solar installation involves working at height on a roof, running new circuits, and connecting live DC and AC electrics together safely, all of which carries real risk if it’s not done properly.
A qualified electrician working to BS 7671 wiring regulations knows how to isolate and connect a system safely, how to avoid the kind of poor connections that can lead to arcing and, in rare cases, fire. An unqualified or uninsured installer cutting corners might save you a little on the quote, but it can cost you far more if something goes wrong, whether that’s a failed installation, a voided buildings insurance policy, or a safety issue you don’t discover until much later.
It’s also worth checking that whoever you’re considering carries proper public liability insurance, so you’re covered if anything is damaged during the work, and that they’re registered with a recognised competent person scheme. This is exactly why the Microgeneration Certification Scheme (MCS) works on what it calls a “double lock” model: both the equipment used and the installer fitting it have to be certified for the installation to qualify for an MCS certificate. According to MCS’s own guidance, MCS-certified installations come with a five-year workmanship guarantee backed by the scheme, giving you recourse if something goes wrong or your installer stops trading.
Without MCS certification, you also won’t be able to access the Smart Export Guarantee, which is the next piece of the puzzle.
Getting paid for what you don’t use
Once your system is up and running, any electricity you generate but don’t use yourself can be sold back to the grid through the Smart Export Guarantee (SEG), a government-backed scheme run through your energy supplier and overseen by Ofgem. Ofgem’s own figures show that by the end of March 2025, 270,395 solar homes had joined an SEG tariff, a 63 percent rise on the year before. You’ll need MCS certification and a smart meter to be eligible, so it’s worth factoring the value of SEG income into how you think about the overall investment, not just the upfront cost of installation.
Why so many homes are making the switch right now
You’re not imagining it if it feels like solar has become a lot more common on roofs around Basingstoke recently. UK solar installation numbers have been breaking records, with the country passing two million total solar installations for the first time in March 2026, according to pv magazine’s coverage of the milestone. Rooftop solar on homes accounted for the majority of that growth, driven largely by rising electricity prices and a growing appetite among homeowners to generate their own power rather than simply pay whatever the market asks.
With that surge in demand has come a surge in installers, and not all of them are equally qualified. It’s worth taking the time to check credentials properly rather than going with whoever can start soonest or quotes the lowest figure.
What to actually check before you commit
Before agreeing to any solar quote, it’s worth asking a few straightforward questions. Is the installer, and the equipment they’re proposing, MCS certified? Are they registered with a recognised competent person scheme, and can they show evidence of current public liability insurance? Will the quote include a proper site survey of your specific roof, rather than a generic estimate based on your postcode? And does the workmanship come with a guarantee that means something if a problem shows up two or three years down the line?
A reputable, insured electrician will be happy to answer all of this without hesitation, because it’s exactly the kind of due diligence that separates a reliable long-term installation from a job that looks fine on the surface but causes problems later. GU Solutions is a NICEIC Approved Contractor and Domestic Installer, which means we’re independently assessed against exactly this kind of criteria, not just self-declaring it.
Why a proper quote beats a guessed average
Given how much your roof, your equipment choices, and your household’s energy use all affect the final figure, any quote worth having starts with a proper assessment of your specific property, not a generic price list. That means looking at your roof’s orientation and shading, checking access for scaffolding, understanding how your household uses electricity day to day, and talking through whether battery storage or an EV charger might be worth adding into the mix at the same time.
For genuine peace of mind, that assessment also needs to come from someone properly qualified and insured to do the work, not just someone who happens to be available. It’s the difference between an installation that’s safe, reliable, and backed by a real guarantee, and one that leaves you exposed if something goes wrong down the line.
If you’d like an honest, tailored assessment of what solar could look like for your home in Basingstoke, Old Basing, Chineham, Oakley, Sherborne St John or the surrounding area, GU Solutions is the first port of call. As NICEIC Approved Contractors and Domestic Installers, we’ll talk you through what’s realistic for your roof, no generic price list, just a safe, properly certified plan built around your actual home.
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