ECO4 can fund free solar panels for low-income and vulnerable households — but the eligibility rules are narrower than most guides let on, and the scheme closes permanently on 31 December 2026. If you think you might qualify, the window is short and the waiting lists are already growing.
What is ECO4 and does it actually cover solar panels?
The Energy Company Obligation (ECO4) is a UK government scheme that legally requires large energy suppliers — such as British Gas, E.ON, EDF, OVO and Octopus — to fund energy efficiency improvements in eligible homes. It is administered by Ofgem and has been running since April 2022.
Solar panels are listed as a fundable measure under ECO4, but there is an important catch: ECO4 takes a whole-house approach. Rather than handing out single measures, the scheme aims to lift your home's Energy Performance Certificate (EPC) rating by at least two bands as part of a broader retrofit package. Solar panels tend to come as part of that package — typically alongside insulation or heating work — rather than as a standalone giveaway. If your roof is the only thing that needs attention, the scheme may fund it, but expect a full property assessment first.
Battery storage is not currently funded under ECO4. If you want a battery alongside your panels, you would need to pay for that separately. You can read more about whether that cost is worthwhile in our guide to solar battery storage.
When does ECO4 close — and is there a replacement?
ECO4 was originally due to end on 31 March 2026. In January 2026, the government confirmed a nine-month extension, pushing the final deadline to 31 December 2026. No further extensions are planned.
Crucially, there is no direct successor scheme confirmed. Future support for low-income households is expected to come through the government's Warm Homes Plan, but the eligibility criteria and timelines for that programme have not been finalised. There may well be a gap between ECO4 closing and any replacement being fully operational. If you qualify now, waiting is a genuine risk.
There is also a practical timing issue. The process from your first application to panels on your roof typically takes anywhere from six to twelve weeks. Apply in November and you are cutting it very fine for a December deadline — especially as installer capacity tightens as the scheme's end approaches.
Do I qualify for ECO4 solar panels? The honest eligibility checklist
To have a realistic chance of ECO4 funding for solar, you generally need to tick all three of the following boxes:
- Benefits or low income. Someone in your household receives a qualifying means-tested benefit — most commonly Universal Credit, Pension Credit, Income Support, income-based JSA or ESA, Housing Benefit, or Child Benefit (subject to income thresholds). You can check the current qualifying list at gov.uk or through Simple Energy Advice.
- EPC rating of D, E, F or G. Your home must be energy-inefficient by the scheme's definition. If your EPC is already band C or above, you do not qualify for ECO4 funding. You can find your current EPC rating free of charge at gov.uk/find-energy-certificate.
- Owner-occupier or consenting landlord. You must own the property, or if you are a private tenant, have written permission from your landlord before any work can proceed.
If you tick all three, it is worth applying promptly. If you only tick one or two, read on — the ECO4 Flex route may still be open to you.
The gas boiler catch most guides don't mention
Here is the detail that is routinely skipped in ECO4 guides, and it matters if you have a gas boiler.
ECO4 is built around its whole-house, multi-measure logic. If your home already has a functioning, reasonably efficient gas central heating system, the scheme may decide that solar panels alone won't move your EPC rating by the required two bands. In that case, the supplier's installer may decline to fund solar — not because you don't meet the benefit or income criteria, but because the property doesn't meet the scheme's energy-improvement target threshold on its own.
Homes with older, less efficient heating, solid walls, or no loft insulation are typically prioritised precisely because there is more room to improve the EPC score. If your home is already partially efficient thanks to a modern boiler and good insulation, the ECO4 maths may not stack up in your favour — even if you are on a low income and receive qualifying benefits.
The honest verdict: don't assume you qualify simply because you're on the right benefits. A property assessment will determine whether the installer can make ECO4 work for your specific home.
What is ECO4 Flex — and can it help if I'm not on benefits?
ECO4 Flex (formally called the Local Authority Flexible Eligibility element, or LA Flex) is a separate route that allows local councils to refer households who don't receive qualifying benefits but are still in fuel poverty or vulnerable circumstances. Your council can refer you if you meet its own criteria — typically low income, fuel poverty, or a health condition made worse by a cold home.
To qualify through ECO4 Flex, your home still needs a low EPC rating (D, E, F or G), and your council must be actively participating in the scheme. Not every council runs an active Flex referral programme, so availability varies by area. The first step is to contact your local authority directly and ask whether it is currently accepting ECO4 Flex referrals.
ECO4 Flex is a genuine route to free solar for households who fall just outside the standard benefit criteria — but it is not a back door that bypasses the property rules. The same whole-house approach still applies.
How do I apply for ECO4 before it closes?
You do not apply to a single national body. Instead, you contact either an obligated energy supplier or a registered ECO4 installer, who will run an initial eligibility check and then arrange a property survey. Importantly, you do not have to use your own energy supplier — any obligated supplier can fund the work regardless of who you currently pay your bills to.
Here is the typical sequence:
- Check your EPC rating at gov.uk/find-energy-certificate.
- Confirm which qualifying benefits apply to your household (have a current award letter ready).
- Contact your energy supplier's ECO team, or approach your local council if pursuing the Flex route.
- A qualified energy surveyor visits to assess your property and confirm which measures are viable.
- If approved, an installation plan is drawn up and MCS-certified installers carry out the work.
Allow at least eight to twelve weeks from first contact to completed installation. Given that the scheme ends on 31 December 2026 and supplier quotas are first-come, first-served — and can fill before the deadline — acting in autumn 2026 is leaving it late.
What if I don't qualify for ECO4?
Not qualifying for ECO4 is disappointing, but it does not mean solar is out of reach. Most homeowners buying their own system currently pay 0% VAT on solar panels and installation — a relief that runs until at least 31 March 2027 according to gov.uk. You can also earn export payments through the Smart Export Guarantee (SEG) for any surplus electricity you send back to the grid; see our guide to the best Smart Export Guarantee rates for a comparison of what different suppliers currently pay.
For a full picture of what a self-funded system typically costs and how long it takes to pay back, our guide on solar panel payback time UK 2026 gives an honest, worked breakdown. And if you want to know what comes after ECO4 for low-income households, our article on the Warm Homes Plan covers what has been confirmed so far.
The bottom line
ECO4 is a genuinely valuable scheme for households who qualify — free solar panels, fully funded, at no direct cost to you. But eligibility is narrower than many headlines suggest: you need the right benefits, a low enough EPC, and a property that fits the scheme's whole-house improvement logic. Homes with modern gas boilers and decent existing insulation are less likely to be approved, even if the household income criteria are met.
If you think you might qualify, the time to check is now — not next month. And if you don't qualify for ECO4, a self-funded system with 0% VAT and SEG export income is still worth getting properly quoted on. FairSolar connects homeowners with vetted, MCS-certified local installers who can give you a free, no-obligation quote — so you know exactly where you stand before you commit to anything. Get your free quotes here.
Frequently asked questions
Do I qualify for ECO4 solar panels?
You are most likely to qualify if you receive a means-tested benefit such as Universal Credit or Pension Credit, your home has an EPC rating of D, E, F or G, and you are an owner-occupier (or a private tenant with your landlord's written permission). All three conditions generally need to be met. If you don't receive qualifying benefits, your local council may be able to refer you through ECO4 Flex if you are on a low income or in fuel poverty.
Does ECO4 cover solar panels if I have a gas boiler?
It can, but having a working gas boiler can make it harder to qualify. ECO4 requires improvements to lift your home's EPC rating by at least two bands as part of a whole-house package. If your gas boiler and existing insulation already give your home a relatively decent EPC rating, the scheme's energy-improvement maths may not work out — meaning an installer could decline to fund solar even if you receive qualifying benefits. A property survey is the only way to know for certain.
When does ECO4 close, and is there an ECO5?
ECO4 has been extended and now ends on 31 December 2026. The government confirmed in January 2026 that there will be no direct ECO5 successor scheme. Future support for low-income households is expected to come through the Warm Homes Plan, but the details and timelines for that programme are still being confirmed — so there may be a gap after ECO4 closes.
What is ECO4 Flex and who is it for?
ECO4 Flex (formally LA Flex) allows local councils to refer households that don't receive qualifying benefits but are still struggling — typically because of low income, fuel poverty, or a health condition worsened by living in a cold home. Your home still needs a low EPC rating, and your council must be actively running a Flex programme. Contact your local authority directly to find out if they are taking referrals.
How long does an ECO4 application take from start to finish?
The process typically takes between six and twelve weeks from your first contact to installation being completed. With the scheme closing on 31 December 2026, and installer capacity tightening as the deadline approaches, applying as early as possible gives you the best chance of having work completed in time. Applications submitted very close to the deadline risk not being processed.