Maintenance & repair of
solar PV & solar thermal systems

A Local Company Covering the South East and Greater London

Need a solar engineer?

With a network of qualified electrical engineers, Rayotec is your local solar specialist. Contact us if your solar system has a fault, is damaged, needs servicing or regular maintenance.

Why choose Rayotec?

  • Which SolarFree Assessment and Fault Finding
    Free telephone or email assessment and fault finding. Particularly with pv solar systems, in many cases we give advice over the phone that allows customers to get their system up and running themselves at no cost.
  • No Hidden Charges & Great Value
    Transparent Pricing - If a visit is required then it includes up to an hours labour which is long enough to fix many common problems.
  • Accreditation
    We are accredited MCS & NICEIC "Approved Contractors", the highest  qualifications a solar company can get.
  • Experienced
    We have installed and serviced thousands of systems over the last 30 years
  • Domestic Projects: We cover Surrey, Hampshire, Middlesex, Sussex, Kent, Berkshire & most of London.  
  • Commercial Projects: We cover the South East, Greater London, the Midlands and Bristol & Bath

Contact us

Enter your details below and one of our team will be in touch

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FREE assessment

We give a free telephone or e mail assessment for every new solar PV & solar hot water customer. There's no obligation and there are no hidden charges. 

We'll ask you a few questions to diagnose any issues you have and can arrange a qualified engineer to visit if required.

Solar PV
Often by asking a few questions we can fault find and give advice which allows the customer to get the system up and running themselves at no cost. We will only arrange for a chargeable engineers visit if it's absolutely necessary. 

Solar thermal hot water
A chargeable engineers visit is nearly always required, but we'll do our utmost to help diagnose issues over the phone.

Contact us
Rayotec Service Team

Reasons to choose Rayotec

We offer a high level of service at the best possible price


Family Run Business, Operating for 3 decades, Which? Trusted Traders - Rayotec Limited is a family run business now in its second generation. Established in 1987, we have been operating in the renewable energies industry and have installed and serviced thousands of domestic and commercial Solar Hot Water and Solar PV systems throughout the UK. Also, as Which? Trusted Traders, we underwent a thorough assessment of all our business processes and procedures and a review of our financial health to ensure that our customers interests are put first.


Close to Home, Quick Response -  Rayotec is based in the South East of England and offers expert, local advice and servicing for all Solar Energy and Solar Thermal systems at very competitive prices throughout the Home Counties. We cover the Greater London area, Hertfordshire, Buckinghamshire, Middlesex, Surrey, Sussex, Hampshire, Berkshire and Kent.

Rayotec Service Team
Rayotec Service Team

Great Value

 As a long established company  we are able to 'group' service calls geographically, allowing us to offer you a high level of service at the best possible price.  We offer cost effective maintenance and repair services for all our own systems and also for Solar PV and Solar Thermal Systems installed by other companies. All of our call outs include up to 1 hour of labour and most problems are resolved within the hour. Whether it's a commercial or a domestic system, our experienced team of engineers can conduct simple services from a quick check to a full in-depth work up to ensure that every aspect of your Solar Energy System is functioning efficiently and effectively to give you clean energy and save you money.

Common Issues

With our wide range of experience we can answer all your questions regarding your solar energy system. However, the most common requests we get, in addition to calls for routine services, are regarding:

Get in Touch

Common issues

Solar electric PV

Solar electric PV servicing

We repair and maintain solar electric PV panels for small and large installations.

Solar hot water

Solar hot water servicing

We help to ensure your solar hot water system is working smoothly, giving you plenty of hot water.

New solar panel installations

Commercial solar maintenance

Solar panels are a valuable investment into your future and you need to know that you are benefiting from the best return on that investment. Rayotec Ltd offer bespoke service packages which are tailored according to the scale and requirements of your system.



Jane Jones

19th February 2021

Getting advice and ordering from this company has been a great experience. Any phone calls have been well answered and followed up with email where necessary. Every step of the way has been easy and Faris in particular has been very helpful, ringing me back when necessary and being "on it" with my order. Would highly recommend them.

Mick Reeves

22nd February 2021

very very help full could not falt help

Liam McCull

18th February 2021

Rayotec have reviewed our solar panel system and disconnected a broken panel. They have been very easy to deal with and provided clear costings and information in advance of their visit. The engineer was very competent, efficient and on time. Everyone I have spoken to at Rayotec has been friendly and helpful, they even found a replacement panel for me on Ebay!

Paul Wesbroom

10th February 2021

Thank you so much Rayotec. E-mailed response waiting for me in the morning and problem solved.

Peter Reeves

08th February 2021

Rayotec installed our solar thermal array ten years ago and it has performed faultlessly since then. Recently we had them back to decommission the system to allow us to change our DHW cylinder. They have just returned to get it back up and running again. All our dealings with Rayotec have been exemplary. Communication with them was always excellent. It was always easy to get someone on the end of the phone when needed and we were kept informed in detail by email about all aspects of our work. When a technician visited our house they were always extremely professional. They were polite, tidy and, above all, very competent. I would highly recommend them.

David Howell

30th January 2021

Excellent service - the engineer even came out 3 days early as he had a cancellation. Will definitely use them again if required.

Lis Souto-Montero

21st January 2021

I used Rayotec to decommission an old hot water solar system. They were very good from start to finish. Great communication, easy to deal with, accommodating, fair price and very efficient. Would definitely recommend this company and would use them again.

Anna Slate

13th January 2020

It is honestly so refreshing to speak with a person who knows their industry and not a robot or switchboard. Fast, honest and professional advice received from Rayotec’s solar department. We would happily recommend to anyone who may be seeking solar assistance. Anna

Phillip Couchman

07th January 2021

Really excellent company highly recommended sorted my solar system very quickly

Pauline Fletcher

07th December 2020

A big thank you to Rayotec who, although they were unable to help us themselves, were very helpful in finding a contractor closer to us.

Neil Sinclair - (Taken from Google)

04th December 2020

I am mightily grateful and impressed with Rayotec. I appeared to have a problem with my PV Solar. Rather than send a technician with ensuing costs, Rayotec advised me over the phone and via email, saving me several hundred pounds but ensuring my custom for anything and everything solar and Therma related henceforward.

Molly T

09th November 2020

Very helpful solar staff, highly recommend!

Andrew Whiting

29th October 2020

Very helpful and informative. Turned up on time and got things sorted out.

Elaine Darby

11th October 2020

Being totally ignorant about my solar system I contacted Rayotec for help when it wasn’t working. . Help was swift, courteous and very professional. The problem with my system was patiently explained to me, all my questions were answered and the problem was dealt with efficiently. All the people at Rayotec we’re really great and I can’t praise them highly enough.

Ed - (Taken from Google)

07th September 2020

Prompt and very helpful response to my enquiry

Derek Taylor

03rd September 2020

Easy appointment system with a friendly engineer arriving on time and suitably briefed about our issue. The engineer, David I believe, and his assistant/apprentice were happy to access our rather cluttered loft area to tackle the problem of patchy generation. Once established that our inverter - as suspected - was at fault, they consulted their office to check that the spare carried in their van was compatible and connected this new inverter to our system which now works perfectly. Very satisfied.

Ezekiel A.J Richards

21st August 2020

Office staff extremely helpful and polite, cannot recommend enough!!

Valerie Bardrick

15th August 2020

I contacted Rayotec for help & assistance with the recent faults that had arisen on the solar power system at my late brother-in-law's house and Perry Viner whom I spoke to was so understanding and he really went out of his way to help me to even sending myself an email afterwards with details of a family company that is based nearer to our location and whom will be able to assist me further and I highly recommend others to contact Rayotec if they also have any problems at all with their Solar panel system and thank you again Perry for all your help and advise which I really appreciated. Val B.

Yel Sel

15th August 2020

Highly professional company and first class customer service. Would definitely use again.

John Harris

14th August 2020

I called Rayotec recently to enquire about help and information regarding an upgrade of our 9 year old solar installation to an "optimised" system. This was my 1st time of speaking to the company Rayotec and I was dealing with a representative called Perry. Perry was friendly, charming, extremely professional and so helpful, quite frankly I was taken back with his knowledge and intention to clarify detailed solutions to all my quite specific questions. What an ambassador of Rayotec! Without doubt I knew this was a company I would chose to work with; and after reviewing their independent feedback I was convinced I needed to look no further for my Solar powered requirements . Thank you Perry, I am sure Rayotec values employees like you which can only enhance their continued business.

Annee Warren-Smith

12th August 2020

Terrific company! We got in contact when our photovoltaic solar panels ceased generation. I received a prompt phone call from Perry who patiently talked me though a few basic checks. I am delighted to say we were able to get the system functioning from the advise given on the phone but would not think twice about contacting again - thank you!

Chris dG

10th February 2020

Thanks Rayotec for your help and advice in resolving our recent solar thermal problems – courteous and knowledgeable. We particularly appreciated your engineer's willingness to explain the nature of the issues so we could proceed with confidence.

Evelyn Quinn

09th July 2020

Very happy I contacted the servicing team, masters of their craft

Peter Moss

23rd June 2020

The engineer, Paul, was very efficient and gave us advice on our Solar system. I would definitely use Rayotec again.

Councillor Richard Clifton

24th June 2020

The man who came, Paul, was very helpful and fixed the leak, which was what was most bothering me. Unfortunately it was a cloudy day so he was not able to ascertain whether or not the system was working. We think it is not. He outlined what needed to be done if it is not and said he would send us an estimate of the cost. Hope to get that.

Sam Newman

9th June 2020

Fast, honest and reliable. Easy contact with the office and very knowledgable engineer. We would happily recommend rayotec to our friends and family with solar panels

"Quality" - Jordan Murrow

5th June 2020

We contacted Rayotec when our solar water panels stopped providing us with hot water. My point of contact at the office was with Mr Viner, a very helpful and polite gentleman who asked me numerous questions regarding my solar to try and diagnose if a fault was present. My solar was in dire need of new glycol as the last service was completed over 6 years ago, we were never told about the up-keep of the system. Mr Viner provided us with a fair quote for the works and we were scheduled in with no fuss. I would have no hesitation at all in using Rayotec again in the future. BR J.Murrow

Hannah G. S

26th May 2020

My enquiry was answered first thing in the morning. Extremely helpful team, spoke with both Perry & Parmi on the solar team who arranged for a engineers visit with Dave. The visit itself was carried out very professionally and my PV system now works again after a 3 month hiatus... Highly recommended company!!

Karen Moore

19th May 2020

I contacted Rayotec after being messed about by the people who installed our solar system. Perry asked me several questions to help diagnose the solar panels issues and thankfully it was a very straightforward fix. Very helpful, friendly and knowledgeable team. I would happily recommend Rayotec to anyone with solar problems. Thanks again!

Daniel Skinner

15th May 2020

Original solar installer not available to respond to faulty operation of Solar Edge domestic PV system. Rayotec came to the rescue. Perry in the office and Dave the visiting Tech were first class, helpful and informative and did a great job of getting us back up and running. Top marks to Rayotec.

Courtney Mills

30th April 2020

We had our solar heating panels serviced about a month ago, since then they have been working perfectly. A big thank you to the folks in the office and Paul the engineer for all their hard work.

Gina Clarke

22nd April 2020

Received fast, reliable and friendly advice from Perry on the solar department. An engineers visit was booked on the same day I contacted Rayotec and we were seen within a week and a half. I would not hesitate in using Rayotec again moving forward

Will Hunter-Rosser

02nd April 2020

very helpful and honest in their opinion

Carolyn Heathcote

29th March 2020

Very helpoful staff. Got an early appointment for my solar panel to be serviced. Technician was on time, very efficient and polite. Very pleased with the service I received

btthoray - (Taken from Google)

26th March 2020

Excellent service from making the booking with Perry in the office to Dave the engineer visiting my home and fixing the problem with no fussing about. I will recommend to any one who needs there solar system checked over.

Roy Brice

13th March 2020

Rayotec recently serviced my solar heating system and I have been delighted at there professional and helpful way they run their business. The office staff have been incredibly helpful especially Parmjeet Bains who dealt with my concerns also the engineer namely Peter Byrne who did a wonderful job servicing and curing a leak in the pipe work also leaving everything clean and tidy. I recommend this company to anyone needing help with their solar heating.

Clive Flegg

10th March 2020

Friendly, responsive service over 20+ years of association.

Nigel O'Coffey

24th February 2020

Contacted Rayotec to assist with my Solar PV issue. Original thought was the inverter and having discussed everything with the company the engineer (Dave) visited me and discovered that the problem stemmed from one of the panels. The engineer carried out the tests needed and isolated the offending panel, leaving me with a working system. If I am able to find a replacement panel then Rayotec will fit it for me. Bearing in mind the particular panel is no longer manufactured the engineer gave me all his expert advise for the options to move forward. There was no issue with him returning the new inverter back to base and refunding me the cost difference from the deposit already paid up front. Everything was done in an efficient and friendly way and good communication with Perry and his team throughout either by email or telephone. When the inverter does inevitably fail, as they do not last for ever, I shall be happy to use the services of Rayotec Ltd. in summary: A very helpful and friendly team to deal with.

Palbinder Singh

20th February 2020

Amazing staff. Parmi sorted all my issues out without inconveniencing me. Great service; highly recommended.

Aaron Sinclair

19th February 2020

Rayotec helped repair my solar panels after a long, ongoing fault. Terry handled my enquiry very professionally. From start to finish a fantastic company to deal with. I wholeheartedly recommend Rayotec..... Thanks again

Liz H

13th February 2020

Rayotec came to our rescue immediately when we needed guidance/help with a solar panels problem. They sorted it quickly, efficiently and very professionally. Exceptionally grateful to all involved and would have no hesitation in recommending this company. Thank you.

Sue Cooke - Local Guide

04th February 2020

Engineer on time, friendly, quick and knowledgable. Admin office excellent too. Company was recommended to me by a neighbour and I would recommend also.

Danny Worthington

24th January 2020

Rayotec are a fantastic company that I cannot recommend enough. When my installers went out of business, I came across this company online and am so glad that I did. I was put through to a Mr Viner who's product knowledge was very useful. He was able to assist me with all my queries and offered me a competitive price for servicing. My business will be staying firmly with Rayotec from now on.

Abi Sullivan

20th January 2020

It’s refreshing talking to people who really care about what they do. I have been receiving cold calls from “companies” claiming my installers had gone out of business and I was over due an upgrade, I called the people who installed for us and they had in fact gone out of business however I didn’t understand why I needed to upgrade. I looked online and found Rayotec, my call was answered almost immediately, Perry in Solar quickly explained that there are hundreds of people getting these kind of cold calls and they’re almost always fraudulent. After going through my system with Perry he concluded that my system was perfectly fine the way it is, he answered every question I had in a very professional but friendly manner and provided me with a fair quote for servicing as my installers were no longer around. We will definitely be using Rayotec moving forward.

Harpreet N. Basin

13th January 2020

on behalf of my grandmother. I called for advice on upgrading my solar panels, all of my questions were answered in detail by a friendly member of the solar department. Thank you for all of your help and advice.

Cassie Simmons

07th January 2020

I called in last week and spoke to the Solar Team who went above and beyond to help me. My family had solar installed by a company who have since gone out of business, I spoke with Perry regarding the concerns I had about my system, he talked me through a hard restart and thankfully since then my system has been fine, just in time for the gorgeous weekend just passed. I can’t recommend Rayotec enough, look no further for anything Solar Powered. We will definitely be using them for all our future maintenances.

Mr. T

07th January 2020

1st class company. I’d like to especially praise Dave ( one of their solar PV engineer) . Dave was absolutely superb. His extensive PV solar knowledge helped my greatly, to resolve my failed inverter issue. He was fantastic and I wouldn’t hesitate to recommend Rayotec to others. Thanks Rayotec for your excellent service and brilliant staff.

Nick Baker

07th September 2019

Contacted Rayotec regarding a problem with my solar panels, they replied promptly and requested several details regarding the system and the issue. They then contacted me by phone to discuss it further and suggested a solution. A visit was arranged but the suggested solution fixed the problem so the visit was cancelled with no problem. I found them to be very helpful.

Michael Turner

04th September 2019

I have to say I never tend to leave reviews but simply had to make an exception with Rayotec. From start to finish I received professional advice from the Solar team. I was put through to Mr Perry Viner and I can safely say this man knows his stuff. He made sure he had as much information on my system as possible, asked me many questions to try to narrow down the problem. He then booked me in for a maintenance visit with one of the engineers, I work a really tight schedule but he made sure I was booked in for a date that worked for ME. Not something you get with many companies. The following day Mr Viner called me back after having got in contact with one of his engineers and asked me to run through a couple of things. He then asked me to try restarting my system which I did and the inverter started up as if nothing happened and has since worked perfectly. Don't hesitate to contact Rayotec if you're experiencing problems with your Solar panels. I've spoken with a few different Solar companies and these guys truly care about their customers. 10/10 Service from a lovely family ran business.

Greg Davies

03rd September 2019

I contacted this company for their offer of telephone assistance with solar PV problems. Although later than advertised in getting back to me the advice on the telephone was useful.

Peter Roberts

21st August 2019

Rayotec are excellent to deal with...very knowledgeable, helpful, reliable and trustworthy.

J Hubbard

13 Aug 2019

Excellent company to deal with and very honest

R. Douetil - Rayotec Customer

22 May 2019

I have recently had my solar heating system serviced by Rayotec Ltd., on phoning an appointment was soon made and as I work during the week was scheduled for a Saturday. An engineer phoned on the Saturday morning to announce he had finished his previous appointment and would be with me within 10 minutes. The engineer was polite and extremely knowledgeable , the service was completed without fuss antifreeze replaced and system reset. Due to an unrelated issue , a power surge in my electrical system, I had to call Rayotec again, who made an immediate appointment for the Saturday, and attended to replace the solar control panel, the new unit was explained in full by the engineer before leaving, and the system is now running very well. My point of contact at Rayotec was Perry Viner who was courteous at all times and did everything that could be expected to accommodate my requests for a Saturday appointment. I can whole heartily recommend Rayotec Ltd.,when it comes to Servicing or installing Solar powered systems.

Guildford Customer from Checkatrade

18 May 2018

“Arrived as arranged , careful worker, sorted problem and fitted new inverter.”

Woodbridge Customer from Checkatrade

13 May 2018

“Prompt, courteous and intelligent service. Removed all rubbish. Couldn't have asked for more.”

Reading Customer from Checkatrade

12 Apr 2018

- Installation of a new electric inverter “Rayotec were very helpful and professional. They identified the correct replacement. The installation engineer was excellent.”

Guildford Customer from Checkatrade

09 Jan 2018

- Check system and supply and fit new inverter. “Carried out to my satisfaction very well. Very pleased with all aspects of work from initial contact with Rayotec to job completion.”

Rayotec Customer, Crowthorne.

11 Sep 2017

Their time keeping was very good, they rang before they came and were very tidy. I am pleased with the work

N. Allen, Maintenance and Services Manager

25 Jun 2017

Mina and the team at Rayotec are a pleasure to deal with. Any communications are always handled politely and promptly and they are always on hand to offer unbiased advice on various systems with emphasis on customer care. I would recommend Rayotec for any solar needs, be it installation or maintenance

P Manley

01 Apr 2017

Rayotec installed our Solar PV system so when the inverter failed, typically only months after the manufacturer's warranty expired, I contacted them about a replacement. I spoke with Reza who gave me two options with prices and when I had made my decision Reza kept me informed of progress of the order and the install date. The wait time for installation was only one week and good communication was maintained throughout this period. Dave came to install the new inverter and he was excellent. He was punctual, very efficient with a high level of expertise, very helpful and always polite - a credit to Rayotec. When Dave identified a further problem with my panel array, caused by nesting Jackdaws between the panels and the roof, he was again very knowledgeable and helpful in recommending a pest control company who could resolve the problem. I am very happy with the service I received from the Rayotec Team and cannot recommend them highly enough.

D. Bowles, Estates Manager

21 Feb 2017

Rayotec have been working with us for several years, helping us to continue our aim on reducing our carbon footprint by using Rayotec solar thermal system to heat our hot water requirements. This coupled with Rayotecs after sales service, providing peace of mind for our ongoing maintenance requirements