Solar Incentives in United Kingdom

The Smart Export Guarantee (SEG) replaced the closed Feed-in Tariff (FIT) for new installations from January 2020. Each licensed supplier with ≥150,000 customers must offer at least one SEG tariff. There is no minimum rate floor — competition between suppliers sets prices. Best fixed-export tariffs in 2026 include Octopus Outgoing Fixed (~15p/kWh) and Tomato Energy Lifetime (~10p/kWh); Octopus Agile and Tribe Energy offer half-hourly variable rates that can exceed 30p/kWh during peak periods. Switching to a SEG-friendly supplier is independent of which supplier provides import — many households use the same supplier for both. Eligibility requires an MCS-certified installation, a smart meter (SMETS2 strongly preferred), and a generator no larger than 5 MW. The supplier registers the export meter reading directly via the smart meter; no manual readings or paperwork are required after onboarding.

Since April 1, 2022, the UK has applied 0% VAT to qualifying energy-saving materials installed in residential accommodation in Great Britain (England, Scotland, Wales). Northern Ireland aligned in May 2023. The zero rate applies to solar PV panels, micro CHP units, ground/air/water-source heat pumps, biomass boilers, insulation, draught-proofing, solar water heating, controls, and (since February 2024) battery storage installed alongside or retrofitted to existing solar PV. The 0% rate is scheduled to revert to 5% on April 1, 2027 unless extended. The zero rate must be applied by the installer at point of invoice; standalone DIY equipment purchases without installation services remain at the standard 20% VAT rate. Both equipment and installation labour qualify when supplied as a single contracted service.

The Microgeneration Certification Scheme (MCS) is the UK's quality standard for small-scale renewable systems. SEG-eligible installations and ECO4 funding both require MCS certification of the installer and equipment. Certified installers issue an MCS certificate within 10 working days of commissioning. Equipment must be on the MCS Approved Products List (panels, inverters, batteries listed separately). Self-installation is permitted but requires MCS RIIO-certified self-build verification at additional cost; in practice almost all UK residential installs use a certified installer. MCS is a paid certification body — installer membership fees are passed through into installation pricing.

From April 1, 2023, eligible plant and machinery used in onsite renewable energy generation and storage was exempted from non-domestic Business Rates valuation. The exemption runs through March 31, 2035 for England, with separate provisions in Scotland and Wales. Storage installations (battery systems) qualify when installed alongside a renewable generator. The exemption does not apply to residential properties, which are not subject to Business Rates. Commercial property owners should notify the Valuation Office Agency (VOA) of the installation; failure to do so may result in continued assessment. Listed here for residential operators considering small commercial premises — for purely residential UK installations, the Business Rates exemption is not relevant.