Solar Hot Water Maintenance & Repair


Now Which? Trusted Traders

Solar hot water systems are reasonably low maintenance, but it is still important to give your system the care that it deserves to keep it working smoothly and efficiently to ensure you an abundant supply of hot water for your home.

Why Choose Rayotec

Repair & Maintenance of Solar PV Panels - Which? Trusted Traders
  • Experienced
    We have installed and serviced thousands of solar thermal systems over the last 30 years
  • Great Value
    We used employed engineers rather than subcontractors to keep prices low
  • Trustworthy
    Rayotec have been endorsed by "WHICH?" the UK's largest independent consumer organisation
  • Free Advice
    Whether we installed your system or not, We will always give free advice by phone or email if you have any concerns about your solar thermal system.

Rayotec repair and maintain solar hot water systems of all sizes.   Whether you have a small single panel domestic system on your home or a large scale commercial system, we offer the highest quality service at incredible value, with transparent pricing - No hidden costs.

For commercial jobs we cover most of England. For domestic call outs we cover the South East and London including: Surrey, Sussex, Middlesex, Berkshire, Kent, Oxfordshire, Dorset, Hampshire, Bucks and Greater London.

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Rayotec TeamOur Services


Fault Finding & Repair Service

Sometimes, regardless of the care you take, things can go wrong with your solar thermal system. In these situations you can get in touch with us knowing that, with our local offices in the South East and our wealth of experience and knowledge of solar thermal hot water systems we will be able to get to you quickly to locate the problem and resolve it so that your system is back up and running as swiftly as possible.

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Common problems we deal with


  • Faulty pumpsSolar Heating Engineer
  • Control unit and sensors failing
  • Air locks / blockages with the pipework
  • Leaking components ( pipework, expansion vessels)
  • Leaking hot water cylinders
  • Storm damage
  • Loss of pressure

Health Check & Antifreeze Change

All solar hot water systems use antifreeze as it's heat exchange liquid to protect it from freezing in the colder months. This liquid degrades over time and should be changed every few years so we recommend a Full Health Check every four years to review the system and check the quality of the liquid to ensure it is working as it should to protect your panels from low temperatures in the winter. During our 4 yearly assessment we will:

  • Solar Hot Water Servicing & Maintenance Inspect the solar array for any damage or material failure (if access is available otherwise from ground level visual assessment)
  • Inspect any visual pipework and insulation
  • Check the performance of all system valves and controls
  • Check the circulation of the system
  • Test the quality of the anti-freeze liquid
  • Drain down and dispose of old fluid where necessary
  • Supply new anti-freeze and recommission where necessary

Taking care of your Solar Thermal System

It is important that you give your solar thermal system an occasional inspection yourself to check for any obvious issues, and arrange regular check ups to ensure that your system continues to work at its maximum efficiency and getting you the most out of your investment.

Keep Them Clean
The variability of The Great British Weather is such that dirt and dust are not likely to build up on your solar panels, making them pretty much self-cleaning, but it is worth keeping an eye just to make sure that there is no build up of grime that can reduce the effectiveness of the panels.

Look out for Over Hanging Trees
Keep an eye out for any infringing greenery that has sprouted up and may be overshadowing your roof and blocking the precious sunlight from your panels. (Make sure that you check with the necessary authority before you start lopping down trees!).

Cast an occasional eye over the system
Every now and again do a quick visual check to make sure there are no obvious faults. That there are no leaks around the joints (antifreeze has a distinctive pungent smell), that the pressure is as it should be, the fan comes on when it is supposed to, there are no obvious cracks or damage etc

Get Regular Health Checks
Just like your car, your Solar Hot Water System needs a regular check-up to make sure that the system is operating as it should. Our experienced and efficient team of engineers are familiar not only with the systems that we have installed ourselves but also a whole range of different Solar Thermal Systems and will use their knowledge and expertise ensure your solar energy system continues to provide you with plenty hot water, and ensure you enjoy all the long term benefits of a properly functioning solar energy system for many years to come

Rayotec Ltd

Rayotec is a family run business. With over 30 years of experience working in Solar Energy under our belts you can rest assured that we have the knowledge and expertise to check your system thoroughly and efficiently. As Which? Trusted traders we ensure that the work we do is of the highest quality and that our customers get the exceptional service that we are known for. We have installed thousands of system throughout the South of England and as a well established business we are able to group our calls geographically in order to keep your costs low, and with every call including up to 1 full hour of labour we are able to offer the highest level of service at the best possible price. Added to that, as we are based in the South East of London, we are in the perfect place to offer expert, local advice and servicing to the Greater London Area and the Home Counties. To find out more about Rayotec click here

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