Home energy upgrade
Solar Thermal
Solar thermal panels use sunlight to heat your hot water — cutting the energy your boiler or heat pump needs to raise water temperature year-round.
Step by step
How Solar Thermal installation works
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A survey checks roof orientation, shading, and existing hot water system compatibility.
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Panels (flat-plate or evacuated tubes) are mounted on the roof and connected to a twin-coil hot water cylinder.
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A pump station, expansion vessel, and controller are installed to circulate heat-transfer fluid between roof and cylinder.
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The system is commissioned and filled; your installer provides an MCS certificate confirming standards compliance.
Why it's worth it
Benefits of Solar Thermal
- Can meet 40–70% of a household's annual hot water demand from free solar energy
- 0% VAT on supply and installation
- Works alongside any existing boiler, heat pump, or immersion heater
- Low running costs — no electricity or gas consumed during solar hours
- Long lifespan — quality systems typically last 20–25 years
- MCS certification provides quality assurance and consumer protection
What to budget
Typical cost
Typically £3,000–£6,000 installed (flat-plate or evacuated tube)
Costs vary significantly depending on property size, existing systems, and installer. A surveyor's assessment will give you an accurate figure. Available grants (listed below) can substantially reduce the net cost.
Is this right for you?
Ideal for
- Homes with a south-facing roof and existing hot water cylinder
- Larger households with high hot water demand
- Properties already considering or running a heat pump (complementary)
- Homeowners looking for a lower-cost first step into renewable energy
Financial support
Grants you may qualify for
View all UK energy grants →Ready to go?
Find MCS-certified Solar Thermal installers near you
Compare MCS-certified specialists in your area, check their credentials, and book a free assessment worth £380.
