Solar water heating
Heat your water with the power of the sun and save up to £210 a year(1)!
What is solar water heating?
Imagine using the sun’s natural warmth to heat the water you use every day for your taps, showers, and baths. That’s exactly what a solar water heating system does! It takes energy from sunlight and uses it to warm up the water stored in your hot water tank. While it might not provide all the hot water you need throughout the year, it can really help lower your heating bills.
How does solar water heating work?
A solar hot water system catches the sun’s heat and uses it to warm the water in your storage tank, which then flows through your taps and showers.
Here’s how it does that:
- Flat plate collectors - these are set on your roof or are built right into it, soaking up the sun’s rays
- Evacuated tubes - these look like glass tubes lined up together on your roof
Since the system needs a place to store the warm water, it works best if you already have a hot water tank at home.
How does solar water heating work?
Solar water heating has evolved over the years, making it a practical and eco-friendly choice for reducing hot water costs. With the potential to save up to £210 a year(1), it’s an ideal time to consider a solar water heating system.
Hot water all year round
A solar water heating system works throughout the year, and could even supply all your hot water needs in the summer!
Save on your energy bills
Solar water heating systems use energy from the sun. You could save up to £210 per year with it(1).
Lower your carbon footprint
Using the sun for energy makes this a renewable system and can help you reduce your carbon footprint.
Is my home suitable for a solar water heating system?
Is my home suitable for a solar water heating system?
Solar thermal hot water systems work for most homes, but a few key factors determine if they're the right option for you and your home:
- Roof size – To install a solar thermal system, you'll need around 5m² of unshaded roof space for the panels. This allows enough room to capture sunlight efficiently and heat your water supply.
- Roof direction – A south-facing roof is ideal, but south-east to south-west orientations can also be effective. Shaded roofs may reduce efficiency, so open sunlight is best!
- Efficiency measures – Basic energy efficiency measures, like loft insulation of at least 250mm and cavity wall insulation, help ensure your home is ready to benefit fully from solar thermal energy.
If your home meets all the conditions above, then a solar water heating system could be a great fit for your home.
Ready to harness the sun’s power even further?
Our range of solar panels can take your energy efficiency even further, providing electricity year-round to power not just your hot water, but your entire home.
With our expert solar advice, you’ll find everything you need to get started—from choosing the right panels to understanding installation.
Frequently asked questions about solar water heating
What types of solar collectors are available?
There are two main types of solar collectors:
- Evacuated tubes – Glass tubes mounted on the roof that capture sunlight efficiently.
- Flat plate collectors – Fixed to or integrated into the roof tiles for a more streamlined appearance.
Will solar water heating meet all my hot water needs?
Solar water heating systems typically meet around 90% of hot water needs in summer and about 25%(2) in winter, covering roughly half of your annual requirements. A backup system, such as a boiler or immersion heater, is usually needed to supplement your hot water.
Will I need planning permission for solar water heating systems?
In most cases, planning permission isn’t required for these systems, but it’s wise to check local regulations or consult with an installer, especially if you live in a conservation area or a listed building.
How much maintenance do solar water heating systems need?
Solar hot water systems require minimal maintenance. However, an annual service is advised for peace of mind, with a thorough inspection every five years to drain, flush, and replace the fluid for optimal efficiency.
How much does a solar water heating system cost?
The estimated cost of installing a solar thermal system for a typical home is around £6,000. However, this total may vary depending on the type and size of the system. Standard solar panels are available starting at £5,645(3)(including 0% VAT), which may be a more cost effective option for your home. Find out more here!