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11 July 2025 | Solar PV Systems

Learn How Ready Mixed Solar Heating Fluid Keeps Your Solar Hot Water System Efficient, Safe, & Compliant with UK Standards.

In the world of renewable energy, residential solar hot water systems, or professional solar hot water systems are a smart, eco-conscious investment that can significantly reduce your monthly energy bills and carbon emissions. But like all other high-performance technologies, your solar hot water system needs the essential solar system components and routine solar maintenance, to ensure its functionality is performing at its best.

That’s where Ready Mixed Solar Heating Fluid and Regular Servicing comes into play.

What Is Ready Mixed Solar Heating Fluid?

Ready Mixed Solar Heating Fluid is used in solar thermal systems to transfer heat from your solar collector to your hot water storage tank. The composition of the fluid is specifically designed to maintain the chemical stability of your solar thermal system. It is typically made up of a combination of water and non-toxic antifreeze, but also includes solar system corrosion protection, to protect your system from rust and degradation, and biocides for solar systems, which prevent the growth of algae or bacteria. This composition is beneficial because while the water is the primary carrier of the heat, the non-toxic solar antifreeze prevents the fluid from freezing in cold weather, and additionally raises the boiling point, helping it to withstand high temperatures on those few days a year we have to worry about that in the UK!

As this product is created for customers to use on their home solar systems, as well as for professional use, Ready Mixed Solar Heating Fluid is designed for immediate use and takes away the need for the mix to be measured with a refractometer to optimise the ratio.

Why Solar Thermal System Maintenance Matters

While Ready Mixed Solar Heating Fluid is highly recommended for your residential and/or professional solar hot water system, the importance of regular solar thermal system servicing cannot be overlooked. Over time, it’s possible that glycol, a type of alcohol which is used in antifreeze, can break down and become acidic. But like any sophisticated equipment such as your solar system, it’s good practice to keep on top of general maintenance and servicing; don’t wait for problems to arise, take a proactive approach to solar care.

So, whether you’re refilling solar heating fluid or planning your next service, Ready Mixed Solar Heating Fluid will ensure your system is getting the right mixture to maximise its performance. It’s recommended by us and complies with system warranties and industry standards.