An analysis by Carbon Brief, the UK experienced a 42% year-on-year increase in solar electricity generation during spring 2024, the highest on record. This significant growth was driven by both exceptionally sunny weather and a notable exspansion in solar panel installations across the country.
This article outlines the key findings, the implications for UK households, and how homeowners can take practical steps to benefit from solar energy,
Record-Breaking Solar Output Thanks to Solar Generation Increase
Between January and May 2025 the nation’s solar sites have generated a record 7.6 terawatt hours (TWh) of electricity. This marks the highest springtime solar output since records began 1910.
Key contributors:
- The sunniest spring on record, as reported by the Met Office
- Continued uptake of domestic and commercial solar installations
- Growth in battery storage adoption, improving energy retention and flexiblity.
This increase helped reduce the use of fossil fuel-powered electricity generation during daylight hours and contributed to lower carbon emissions.
Benefits for Homeowners
Lower Electricity Bills
Installing solar panels can lead to annual savings of £300-£600, depending on system size, roof orientation, roof orientation, and electricity consumption patterns. Savings can be higher when combined with time-of-use tariffs and battery systems.
Access to the Smart Export Guarantee (SEG)
Homeowners with solar installations can benefit from Smart Export Guarantee, which compensates households for unused solar electricity exported back to the grid. Several UK energy suppliers offer SEG tariffs with rates.
Improved Energy Independence
By generating electricity on-site, homeowners reduce their exposure to rising wholesale electricity prices and grid dependency, particulalry during periods of high demand.
Solar Adoption Trends
Solar Energy UK reports that domestic solar generation has had a dramatic increase since 2021 and continued to increase in subsequent years. Drivers for this include:
- Reduced cost of solar PV systems over the past decade.
- Increased awareness of net-zero targets and household emissions.
- Policy support through VAT exemptions and local authority grant schemes.
In addition, solar is being intergrated into retrofit and new-build house programs, particularly ECO4 and Home Upgrade schemes.
Considerations for Installation
Before installing solar panels, households should evaluate:
- Roof suitability: South-facing roofs without shading offer the best performance.
- Installation cost: Average costs range from £5,000 to £7,000 for a typical 3-4kW system.
- Payback period: Typically between 7-15 years, depending on energy use and SEG payments.
- Planning permissions: In most cases, installing solar panels does not require planning permission because they are considered “permitted development”.
Battery Storage Options
Battery storage allows households to store any excess generated solar power and use it during the evening or during high-tariff periods. Altough battery systems increase upfront cost, they can improve system efficiency and further reduce grid reliance.
Common options:
- 5-10kWh lithium-ion batteries, typically costing £3,000-£6,000.
- Systems intergrated with energy management software to optimise saving.
Government Support and Policy Context
Solar installations are VAT- exempt for domestic consumers until 2027 under government policy to encourage low-carbon technologies. While there are no direct grants for solar alone, homeowners may combine solar with broader retrofit measures under schemes such as:
- ECO4 (Energy Company Obligation
- Home Upgrade Grant (HUG)
- Green Home Finance Accelerator
These schemes primarily support low-income households or properties with low energy efficiency ratings (EPC D or below).
