Solar Water Heating System

How Solar Hot Water Systems Work

Solar hot water systems collect heat from the sun and transfer it to your property’s hot water cylinder. A typical system includes several key components working together to provide an efficient supply of hot water.

• Solar collectors absorb heat from sunlight.
• Pump stations circulate heat transfer fluid around the system.
• Solar controllers monitor temperatures and regulate system operation.
• Heat transfer fluid carries heat from the collectors to the hot water cylinder.
• Expansion vessels and safety components help maintain correct operating pressure and protect the system.

When sufficient sunlight is available, the system heats your stored hot water automatically. During periods of lower solar gain, your existing boiler or immersion heater provides additional heating when required.

Types of Solar Hot Water Collectors

Evacuated Tube Collectors

Evacuated tube collectors offer excellent thermal efficiency throughout the year and continue to perform well during colder weather and lower light conditions. They are an ideal choice where roof space is limited or maximum performance is required.

Flat Plate Collectors

Flat plate collectors provide an efficient and reliable solution for domestic and commercial hot water systems. Their robust construction and proven design make them a popular choice for many renewable heating projects.

Solar Hot Water Applications

Solar hot water systems are suitable for a wide range of applications, including:

• Domestic homes
• Commercial buildings
• Farms and agricultural properties
• Workshops and industrial premises
• Off-grid homes and remote buildings

They can help reduce the energy required for daily hot water use while supporting lower running costs and improved energy efficiency.

Choosing the Right Solar Hot Water System

Selecting the correct solar hot water system depends on several factors, including:

• Household or building occupancy
• Daily hot water demand
• Roof orientation and pitch
• Available roof space
• Existing hot water cylinder
• Future hot water requirements

If you’re unsure which products are suitable for your project, our team can help you choose compatible solar thermal systems and components.

Typical System Guide

This guide is intended as a general indication only. Final system selection depends on hot water demand, property type and individual project requirements.

Solar Hot Water Components

Alongside complete solar hot water systems, we supply a comprehensive range of solar thermal components, including:

• Pump stations
• Solar controllers
• Expansion vessels
• Heat transfer fluid
• Solar pipework fixings
• Compression fittings
• Air vents
• Pressure relief valves
• Roof flashings
• Replacement spare parts

Whether you’re replacing a single component or purchasing a complete solar thermal system, we supply dependable products designed for long-term performance and reliability.

Why Choose Solar PV Systems

When you purchase your solar hot water equipment from Solar PV Systems, you’ll benefit from:

• Complete solar hot water systems and replacement components
• High-quality solar thermal products
• To suit evacuated tube and flat plate collectors
• Competitive UK pricing
• Fast nationwide delivery

From homeowners and farmers to commercial customers and off-grid users, Solar PV Systems supplies quality solar thermal equipment spares for a wide range of projects.

Frequently Asked Questions

Do solar hot water systems work during winter

Yes. Solar thermal systems continue to collect useful heat throughout the year, although output is naturally higher during the summer months. Your existing boiler or immersion heater provides additional heating whenever required.

What is the difference between solar hot water and Solar PV Systems

Solar hot water systems use the sun’s energy to heat water directly. Solar PV systems generate electricity, which can power appliances, charge batteries or be used with compatible devices to help heat water indirectly.

Can I upgrade my existing solar thermal system

Yes. Many existing systems can be upgraded with replacement collectors, controllers, expansion vessels and other compatible components.

Are solar hot water systems suitable for off-grid properties

Yes. Solar hot water systems are well suited to off-grid homes, cabins and remote buildings, helping to reduce fuel consumption while providing a reliable source of hot water.

Browse our range of Solar Hot Water Systems and Solar Thermal Components below. If you need help choosing compatible products, our team is happy to provide technical advice before you buy.