Do Solar Panels Improve Your EPC Rating?
Yes. Solar panels raise your EPC score because the assessment counts your generation against the home's energy costs, and for many homes the boost is enough to move up a band, commonly from D towards C. How far depends on system size and where your score sits, and a battery now helps too under the updated assessment method.
In This Guide
How the EPC counts solar
An Energy Performance Certificate scores a home from 1 to 100 and bands it A to G, based on a standardised assessment of its energy costs: insulation, heating, hot water, lighting, and on-site generation. Solar PV enters the sums as generation that offsets the home's modelled electricity costs, so panels push the score up in a way few single improvements can match. The assessment method has also moved with the times: the updated methodology used for assessments gives fairer credit to solar and recognises battery storage, so systems are better rewarded than they were under older assessments.
Two things the assessment does not care about, which surprise people: your actual bills, because the EPC models a standard occupancy rather than your family's habits, and your export income, because the certificate is about the building's energy performance rather than your tariff choices.
How much your rating improves
The honest answer is a range, because the score gain depends on the system and the starting point:
- System size drives the gainA 5 to 6kWp array contributes meaningfully more score than a token 2kWp one, for the obvious reason: more modelled generation offsetting more modelled cost.
- Mid-band homes gain the most visiblyA home sitting mid-D can find solar carries it into C. A home already at B has less headroom.
- Batteries now countStorage improves how much of the generation the model treats as usefully used, a change worth knowing if your last assessment predates it.
- Solar does not fix fabricA poorly insulated home stays poorly insulated on the certificate. Panels complement insulation; they do not substitute for it.
Why the band matters
The EPC stopped being wallpaper years ago. The band now touches real money in several places: every sales and rental listing displays it, and buyers increasingly filter by it. Mortgage lenders offer better rates on efficient homes through green mortgage products. Grant eligibility often keys off it, with the current Warm Homes: Local Grant targeting homes rated D to G. And for landlords it is regulatory, covered next. Whether a better band translates into a better sale price is a separate question with its own evidence, which our home value guide treats properly.
Landlords: solar and MEES
Rental properties in England and Wales must meet minimum energy efficiency standards to be let, currently EPC E, with government policy pushing the required standard up over the coming years towards C. That trajectory is why landlords have moved from asking whether to improve to asking which improvements buy the most score per pound.
Solar sits well in that calculation for properties with decent roofs, especially paired with the insulation basics, and the works can be sequenced across tenancies. We fit systems for private landlords and work with housing providers at portfolio scale, where the same logic runs through our housing association and MEES guide.
Getting reassessed after install
Your EPC does not update itself when the panels go on. To bank the improvement, book a domestic energy assessor for a new certificate after installation, and hand them the system paperwork: the MCS certificate and the installed capacity in kWp are exactly what they need to credit the system properly. The new certificate replaces the old one on the national register, where anyone can look up a property's EPC. If you are selling or remortgaging soon, sequence it so the new certificate exists before the listing or application, because the old one will not show your investment.
Improving a rating, or a whole portfolio?
From single homes to landlord portfolios, we design systems that earn their keep on the bill and on the certificate. Over 1,000 installs across the East Midlands since 2011. Call 0115 773 7575, 8am to 8pm, 7 days.
Book a feasibility assessmentFrequently asked questions
How many EPC points do solar panels add?
It varies with system size and the home's starting score, which is why honest answers come as ranges: a properly sized domestic array commonly adds enough points to move a mid-band home up a band. The assessor's software runs the exact sums from your system's installed capacity.
Will solar panels take my house from D to C?
Often, if you are mid-D or better to start with. A home deep in D with poor insulation may need fabric improvements alongside the panels to cross the line. The reliable route: get the current score, and we can indicate what a given system typically contributes before you commit.
Does a battery improve an EPC rating?
Under the updated assessment methodology, yes: storage improves how much of your generation the model counts as usefully consumed. If your certificate predates the change and you have solar or a battery, a reassessment may score the same house better than you expect.
Do I need a new EPC after installing solar panels?
The improvement only appears if you commission a new certificate: nothing updates automatically. Book a domestic energy assessor after the install and give them the MCS certificate and system size. If a sale, remortgage or new tenancy is coming, do it before the paperwork that will rely on the band.
What EPC rating do rental properties need?
Currently a minimum of E to let residential property in England and Wales, with government policy moving the requirement towards C in the coming years. That direction of travel is why many landlords are fitting solar now rather than waiting to be pushed, particularly on properties with straightforward roofs.
Is an EPC the same as an energy audit of my actual bills?
No. The EPC models the building under standard occupancy, so it will not match your bills and does not count your export income. It is a comparable measure of the building itself, which is exactly why lenders, landlords, grant schemes and buyers all lean on it.
Related reading
- Do solar panels increase your home's value?
- Solar for housing associations and MEES
- Solar panel grants UK: what actually exists
- Selling a house with solar panels
- How much do solar panels cost in the UK in 2026?
Better bills and a better certificate
We are an MCS certified installer (NIC200223) based in Bulwell, Nottingham. Systems sized for your usage, with the paperwork your assessor needs on handover. Call 0115 773 7575, 8am to 8pm, 7 days.
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