A practical guide to every grant, incentive and tax relief available for UK solar panel owners in 2026. Whether you are planning a new installation or already have panels on your roof, there is financial support worth knowing about.
The UK government has committed to tripling domestic rooftop solar by 2030 as part of the Warm Homes Plan. That commitment translates into real money for homeowners through VAT relief, export payments, grants for low-income households, and group-buying schemes. This guide covers each one with eligibility details and practical tips so you can work out what applies to you.
Zero-Rate VAT on Solar Panels and Batteries
Since April 2022, residential solar panel installations in the UK carry 0% VAT instead of the standard 20%. This relief was extended and currently runs until at least March 2027. Battery storage systems also qualify, whether installed alongside panels or added later.
For a typical 4kW system costing around 6,000 to 8,000 pounds, the VAT saving is roughly 1,200 to 1,600 pounds. That is a significant reduction in the upfront cost with no application or means-testing required.
VAT Eligibility Conditions
- The property must be a residential dwelling (not a new build by a developer).
- The same company must supply and install the system. If you buy panels from one supplier and pay a separate installer, the labour may attract 5% VAT rather than zero.
- The relief applies to solar PV, solar thermal, battery storage, wind turbines, and heat pumps.
- There is no income threshold or means test.
This is the single biggest incentive available to all homeowners right now, regardless of income. If you are getting quotes for a system, make sure the installer is applying the zero rate correctly on their invoice.
Smart Export Guarantee (SEG)
The Smart Export Guarantee requires all licensed electricity suppliers with 150,000 or more customers to offer a tariff for small-scale renewable generators. In simple terms, your energy company pays you for every unit of electricity your solar panels export to the grid.
SEG replaced the old Feed-in Tariff (FiT) scheme, which closed to new applicants in March 2019. While SEG rates are generally lower than FiT was, the payments still make a meaningful contribution to the financial case for solar.
SEG Rates and Providers
Rates vary considerably between suppliers. As of early 2026, some of the better fixed-rate SEG tariffs include:
| Supplier | Tariff | Rate (p/kWh) |
| Octopus Energy | Outgoing Fixed | 12p (from March 2026) |
| Octopus Energy | Intelligent Octopus Flux | Up to 30p (with battery) |
| Good Energy | Solar Savings Exclusive | 20-25p |
| OVO Energy | SEG Tariff Exclusive | 20p |
| EDF | Export Exclusive 12m | 24p |
Rates change frequently, so check current offers before committing. The best rates often require you to be on that supplier’s import tariff as well. Octopus Flux, for example, requires a compatible battery and gives much higher export rates during peak hours.
I have covered the Octopus export process in detail, including how DIY system owners can register, in my guide on exporting solar energy from a DIY system. For a comparison of Octopus export tariffs specifically, see the Octopus Energy export tariffs breakdown.
SEG Eligibility
- Your system must have a maximum capacity of 5MW (not an issue for domestic installations).
- You need a smart meter or a meter capable of recording export data.
- The installation must be MCS-certified or hold a valid Flexi-Orb certificate. DIY installations without either of these typically cannot access standard SEG tariffs, though Octopus Energy runs a separate trial for non-MCS systems.
- You do not have to take your import supply from the same company that pays your SEG tariff, though the best rates often require it.
ECO4 Scheme
The Energy Company Obligation 4 (ECO4) scheme has been running since April 2022 and is due to end in March 2026. Under ECO4, large energy suppliers are obligated to fund energy efficiency and heating measures in eligible homes. Solar panels can be included as part of a whole-house retrofit approach.
ECO4 funding can be substantial, potentially covering the full cost of a solar installation when combined with other measures like insulation. Support packages typically range from 7,000 to 20,000 pounds depending on what the property needs.
ECO4 Eligibility
- You must be receiving certain means-tested benefits (Universal Credit, Pension Credit, Income Support, or similar qualifying benefits).
- Your home must have an EPC rating of D, E, F or G.
- The scheme targets fuel-poor and vulnerable households.
- Solar panels are more likely to be offered where the home already has decent insulation or the installer is including insulation as part of the same package.
ECO4 LA Flex
Even if you do not receive qualifying benefits, you may still be eligible through ECO4 LA Flex. This route allows local councils to refer households that face fuel poverty or are on a low income but fall outside the standard benefit criteria. Contact your local authority to ask whether they participate in LA Flex referrals.
Note that ECO4 is due to close in March 2026, so if you think you qualify, act quickly. A successor scheme is expected but details have not been confirmed at the time of writing.
Home Upgrade Grant (HUG2)
The Home Upgrade Grant Phase 2 targets off-gas-grid homes in England with poor energy efficiency. The scheme can fund solar PV panels, heat pumps, insulation, and other low-carbon measures.
HUG2 Eligibility
- Your property must not be connected to the mains gas grid.
- Your home must have an EPC rating of D, E, F or G.
- At least one occupant must receive means-tested benefits.
- Your local council must have opted into the HUG2 scheme.
- England only (Scotland, Wales and Northern Ireland have separate schemes).
HUG2 funding has been winding down and new applications may be limited in some areas. Contact your local authority or the Energy Advice Helpline on 0800 098 7950 to check availability in your area.
Warm Homes Plan
The government’s Warm Homes Plan represents 15 billion pounds of public investment to upgrade up to 5 million homes by 2030. While still being rolled out, the plan includes several measures relevant to solar:
- Low-interest or zero-interest loans for solar panels and batteries, expected to launch through the Consumer Loan Scheme in April 2027 with 1.7 billion pounds of lending backed by 300 million pounds of government funding.
- Fully funded upgrades for low-income households, covering insulation, heating and solar at no cost to the homeowner.
- Future Homes Standard, expected in early 2027, which will require solar panels as standard on all new-build homes.
The Warm Homes Plan is still in its early stages. Keep an eye on government announcements for confirmation of dates and details as individual programmes within the plan open for applications.
Boiler Upgrade Scheme (BUS)
The Boiler Upgrade Scheme does not cover solar panels directly, but it is worth mentioning here because many homeowners combine solar with a heat pump installation. A heat pump paired with solar panels is one of the most effective ways to cut both electricity and heating bills.
BUS provides upfront capital grants deducted directly from your installer’s quote:
- 7,500 pounds for an air source heat pump.
- 7,500 pounds for a ground source heat pump.
- 5,000 pounds for a biomass boiler (rural properties only).
The budget for 2025/2026 is 295 million pounds. You need an MCS-certified installer, and the property must currently use a fossil fuel heating system (gas, oil, LPG or electric). The grant is applied at the point of installation, so you see the discount on your invoice rather than claiming it back afterwards.
Solar Together Group-Buying Schemes
Solar Together is a group-buying programme run by iChoosr in partnership with local councils across England and Wales. The idea is simple: by pooling demand from hundreds of households, the scheme negotiates lower prices through a reverse auction where pre-vetted installers compete on cost.
How Solar Together Works
- Register through your local authority’s website. Registration is free and carries no obligation.
- Auction: Once registrations close, Solar Together holds a reverse auction. Pre-vetted installers bid to offer the lowest price for the group.
- Personal offer: You receive a personalised quote based on your property. You can accept or decline with no pressure.
- Installation: If you accept, the winning installer surveys your roof and arranges installation.
Participants typically save 30 to 40 per cent compared to going it alone. The scheme is not available everywhere, so check whether your local council is taking part. Councils in areas like London boroughs, the South East, West Yorkshire and the West Midlands have run Solar Together rounds in recent years.
Local Authority Grants and Schemes
Beyond the national programmes, many local councils run their own energy efficiency grants or low-interest loan schemes. These vary widely and change frequently. Some examples:
- London boroughs have offered solar grants through the Mayor’s Solar Together programme.
- Welsh homeowners can access the Warm Homes Nest scheme, which provides free energy efficiency improvements including solar for eligible households.
- Scottish homeowners may qualify for Home Energy Scotland interest-free loans of up to 7,500 pounds for solar PV.
- Northern Ireland has the Northern Ireland Sustainable Energy Programme (NISEP).
The best starting point is the GOV.UK energy efficiency page or calling the Energy Saving Trust helpline. They can tell you exactly what is available at your postcode.
Why MCS Certification Matters
One thread runs through nearly all of these schemes: MCS certification. The Microgeneration Certification Scheme is the UK’s quality assurance standard for renewable energy installations. To access SEG payments, the Boiler Upgrade Scheme, and most grant funding, your installation must be carried out by an MCS-certified installer.
This is worth factoring into your plans early. If you are considering a DIY solar installation, be aware that DIY systems generally cannot be MCS-certified. That does not mean you cannot export energy (Octopus runs a trial for non-MCS systems), but it does limit access to grants and the full range of SEG tariffs.
You can search for MCS-certified installers in your area at mcscertified.com.
What Savings Can You Expect?
Putting it all together, here is a realistic picture for a typical UK household installing a 4kW solar panel system with battery storage in 2026:
| Item | Typical Value |
| System cost (panels + battery + installation) | 8,000 – 12,000 pounds |
| VAT saving (0% vs 20%) | 1,600 – 2,400 pounds |
| Annual electricity bill reduction | 300 – 600 pounds |
| Annual SEG income (exporting surplus) | 100 – 400 pounds |
| Payback period | 6 – 10 years |
If you qualify for ECO4 or HUG2, the upfront cost could be reduced significantly or eliminated entirely. Even without grants, the combination of VAT relief, bill savings, and export income makes the financial case strong for most homeowners. For a deeper look at the numbers, see my post on whether solar panels are worth it in 2026.
How to Apply
The application process depends on the scheme:
- VAT relief: No application needed. Your installer applies the zero rate automatically.
- SEG: Contact your chosen energy supplier and register with your MCS certificate and smart meter details.
- ECO4: Contact your energy supplier or a local ECO4 installer. You can also ask your local council about LA Flex referrals.
- HUG2: Apply through your local authority if they are participating.
- BUS: Your MCS-certified installer applies on your behalf through Ofgem.
- Solar Together: Register through your local council’s Solar Together page when a round is open.
Battery Storage Incentives
Battery storage benefits from the same 0% VAT as solar panels. Beyond that, batteries unlock the most lucrative export tariffs. Time-of-use tariffs like Octopus Flux let you charge your battery from the grid during cheap overnight periods and export during expensive peak hours, earning significantly more than a flat-rate SEG tariff.
If you are weighing up whether to add a battery, I have written about battery storage without solar and the economics of different setups. The short version: batteries make the most financial sense when paired with a time-of-use tariff and solar panels together.
Summary
The UK has a decent spread of financial support for solar in 2026. The zero-rate VAT alone saves over a thousand pounds on any residential installation, and the SEG provides ongoing income for exported electricity. For lower-income households, ECO4, HUG2 and the Warm Homes Plan can cover much or all of the cost.
The key practical steps are:
- Check whether you qualify for ECO4, HUG2 or local authority grants first. Free solar is obviously the best deal.
- If you are self-funding, get quotes from MCS-certified installers and verify they are applying 0% VAT.
- Once installed, shop around for the best SEG tariff. Do not just accept your current supplier’s default rate.
- Consider a battery if you want to maximise export earnings through time-of-use tariffs.
- Watch for the Warm Homes Plan loan scheme launching in 2027 if upfront cost is a barrier.
Incentive programmes change regularly. I will update this guide as new schemes open or existing ones are extended. If you have questions about a specific scheme or your eligibility, feel free to get in touch.
