Grants and funding for solar panels for landlords

Funding for landlord solar is a patchwork, and the most important thing to grasp is that very little of it is paid directly to landlords for the panels themselves. There is no headline solar grant for buy-to-let. Instead, the money sits in three places: tax relief for incorporated portfolios, export income you keep yourself, and tenant-led schemes that fund insulation and heating around the solar. Used together with the £10,000-per-property cost-cap framework under the Warm Homes Plan, these routes can meaningfully lower the net cost of getting a rental to EPC band C by 2030. Here is how each one works for a landlord, and how they stack.

Capital allowances: the real prize for incorporated landlords

If your portfolio is held in a limited company (an SPV, as many landlords set up after Section 24 removed full mortgage-interest relief), solar PV counts as qualifying plant and machinery. The company can claim the Annual Investment Allowance, which gives 100% relief on the first £1m of qualifying capital expenditure, and the 50% First Year Allowance can apply to qualifying spend above that. At current corporation tax rates that can return roughly a quarter of the cost as a year-one tax saving. This is the single biggest piece of "funding" most landlords will access, and it is the reason the ownership structure matters so much. If you hold the property personally as a residential let, you cannot claim capital allowances at all, the furnished holiday let regime and its allowances were abolished from April 2025, leaving only Replacement of Domestic Items Relief for furnishings, not for solar. Always confirm the position with your accountant, because it turns entirely on your structure. The official guidance is on capital allowances.

Smart Export Guarantee: income you keep

The Smart Export Guarantee pays you for electricity your array exports to the grid. It is open to MCS-certified solar up to 5 MW with a smart meter capable of half-hourly export readings, and tariffs in 2026 typically run 3 to 15p per kWh, supplier-set with no government minimum, so it pays to shop around. For landlords this is genuinely valuable for one reason: where the system is registered in the landlord's name, the export income accrues to the landlord, not the tenant. In a standard single let where the tenant pays the electricity, the SEG is one of the few direct cash returns you get from the array, so registering the system to the right account is not an afterthought, it is part of the business case. The framework is on the Smart Export Guarantee guidance.

Boiler Upgrade Scheme: solar's natural partner on off-gas lets

The Boiler Upgrade Scheme is open to all property owners in England and Wales, including private and portfolio landlords, with one grant per property and no cap on the number of properties. It pays £7,500 for an air source or ground source heat pump, rising to £9,000 for off-gas oil or LPG homes from July 2026, and £2,500 for an air-to-air heat pump from April 2026. From 28 April 2026 the previous EPC eligibility requirement was removed, widening access. For off-gas rural lets, properties heated by oil or LPG with poor EPCs and high tenant bills, this is the strongest pairing: the grant funds the heat pump, solar offsets part of its electricity demand, and the combination delivers a large EPC uplift toward band C. The install must be by an MCS-certified installer replacing a fossil-fuel system. Details are on the Boiler Upgrade Scheme page.

ECO4 and the Warm Homes: Local Grant: tenant-led routes

Two schemes fund insulation and heating measures on your property, but they are tenant-driven, not landlord-driven, so you cannot apply directly. Under ECO4 (running to December 2026), a tenant on a qualifying means-tested benefit, or referred via LA Flex, can unlock fully or partly funded insulation and heating, with your consent and at no cost to the tenant. The Warm Homes: Local Grant (to 31 March 2028, England only) lets a privately renting tenant on a household income of £36,000 or less, in an EPC D-G property, apply through the local authority with your permission, again at no cost to the tenant. Landlords cannot claim either directly, but on lower-income tenancies they are a real way to subsidise the fabric measures that do most of the EPC heavy lifting, freeing your own capital for the solar that generates income. The benefit must flow to the occupant, and you give consent, not money.

How these stack, and the order to use them

The smart sequence on a typical property is: use any tenant-led funding (ECO4 or Warm Homes: Local Grant) for insulation where the tenant qualifies, self-fund the solar array sized to clear band C and generate SEG income, register the SEG in your own name, and, if the portfolio is incorporated, claim the capital allowance on the solar spend. On an off-gas rural let, add the Boiler Upgrade Scheme for the heat pump on top. Everything qualifying counts toward the £10,000 cost cap, and improvements made from October 2025 already count, so works done now are banked against the cap rather than wasted.

Common pitfalls

Three mistakes cost landlords money. The first is registering the SEG export to the tenant's account by default, handing away income that should be yours, fix this at commissioning. The second is assuming personally-held lets get capital allowances, they do not, so either incorporate before the spend (a decision for your accountant, with stamp duty and CGT consequences) or accept the relief is not available. The third is treating an exemption as a plan: under the new regime landlords are expected to spend up to the £10,000 cap before an all-improvements exemption applies, and each exemption (high-cost, third-party consent, or wall-insulation-damage) must be evidenced and registered on the PRS Exemptions Register and lasts only five years. Exemptions are a backstop for genuinely unimprovable stock, not a funding strategy. For most properties an upgrade is cheaper and lower-risk than repeated exemptions. We map the right combination of these routes to your specific properties and structure, then leave the tax sign-off to your accountant.