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Endorsed by Which? Trusted Traders

Tethys Energy Ltd

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36 Reviews

Opening Hours
Today - 08:00–17:00
  • Monday 08:00–17:00
  • Tuesday 08:00–17:00
  • Wednesday 08:00–17:00
  • Thursday 08:00–17:00
  • Friday 08:00–17:00
  • Saturday - Closed
  • Sunday - Closed


Tethys Energy specialises in the installation of solar PV systems, battery storage systems and electric vehicle charge points.

We pride ourselves on delivering the highest standards of customer service and installation work.

We are accredited with the Microgeneration Certification Scheme (MCS) to provide solar PV and battery storage installations for domestic premises.

We are also accredited under the Electric Vehicle Homecharge Scheme run by OLEV (Office for Low Emission Vehicles) to install electric vehicle charge points.

There is no hard selling or cold calling, just facts and figures. We work with our clients to deliver systems which work for their specific requirements.

For existing systems which may be experiencing problems, we have over 10 years of solar PV and electrical installation experience. We will arrive at the most cost effective solution to resolve any issue.

Please have a look at our reviews and work. You will find more information on our website.

What we do

  • Renewable energy

    • Solar panels
    • Solar Panel Maintenance
    • Solar water heating
  • Cleaning services

    • Solar panel cleaning
  • Electricians

  • More Services

    • solar pv repair
    • ev installation
    • battery installation

Customer reviews

Why you can trust these reviews

All reviews are verified as being genuine and a true customer of this trader.

How can we be so sure?

100% of the reviews we publish have been through our stringent moderation process.

36 reviews
Customer Service
Sort by
Excellent Work - Highly recommended
Customer Service
I obtained four quotations for a new Solar Panel (possibly with battery) installation. As I dealt with each supplier, I learned more and adjusted my requirements. Jason won the order because he had been so helpful and patient with my questions and changes because he was able to give me the best arrangement of panels and a battery that was affordable. His final quote was for a 3.6 kW pk system comprising 2 sets of 5 all black LG panels built into my 2 small South and East facing slate roofs. Included was an 8kWh GivEnergy battery and hybrid inverter and a My Energi Eddi to heat my hot water. He met all my requirements at a good price. Jason started on time but final completion was delayed by a hold-up in the battery delivery - not his fault. I found his quote and his work were of a very high professional standard and the wiring and mountings were all impeccably neat. He was a pleasure to work with and, unlike some other quoters was not at all "pushy". At all times before, during and post contract his attention to customer service has been outstanding.
Robert in Hampshire Posted on 26/10/2021 , work completed 06/07/2021
The trader replied (on 28/10/2021)
Thank you Robert, I really appreciate the review.
Lovely job, decent lad
Customer Service
Jason installed 15 panels for me. His work was exemplary, as was his advice, timekeeping and tidiness. I was very satisfied with the whole job. I would highly recommend Jason.
Customer in Reading Posted on 18/10/2021 , work completed 03/10/2021
The trader replied (on 20/10/2021)
Ha, I'll take being called a lad any day, it's been a while! I'm very glad you are happy with the project, thank you. Jason
Excellent work on PV installation.
Customer Service
Very knowledgeable, and took the initial planning etc very seriously. Gave an honest assessment of the options. Always responded quickly to queries. All work was carried out on schedule and with minimal disruption. Very neat and tidy. Would definitely recommend!
Customer in West Berkshire Posted on 05/10/2021 , work completed 01/09/2021
The trader replied (on 06/10/2021)
Thank you for the great feedback. Jason
The complete professional service
Customer Service
Jason from Tethys recently completed a 6.4KWp solar PV system. I am delighted with the professional service that Jason provided from pre sales conversations through quotation, navigating the necessary approvals , securing the deposit with insurance and then an excellent installation and handover . I would recommend him to anyone considering this type of system , his technical knowledge is explained to a novice like me and gave me the confidence to proceed with this investment.
Customer in Wokingham Posted on 06/07/2021 , work completed 03/07/2021
The trader replied (on 14/07/2021)
It's great to get this kind of response from a satisfied customer, many thanks.
Maintenance of Solar Panels and Mesh Installation
Customer Service
Following some squirrels nesting under the panels, it was necessary for the installation to be checked, any damage repaired and have mesh added to prevent further unwelcome visitors. Jason provided an accurate quotation and is quick to respond to email queries. The work was completed professionally, on time with no fuss. Full details of the repairs to some chewed wiring were given in the PV audit report. I would not hesitate to recommend him and his team for any maintenance work (and for installations) as it's clear he is extremely knowledgeable and has great attention to detail.
Customer in Wokingham Posted on 25/06/2021 , work completed 21/06/2021
The trader replied (on 01/07/2021)
Thank you for the excellent feedback. Jason
Solar Panel Installation
Customer Service
We chose Tethys after getting several quotes from other PV installation companies. Jason was quick to respond to all queries and provided a detailed quote that fully met our needs. The installation was carried out efficiently as planned and we are very happy with all the standard of the work done. Jason obviously prides himself in customer service and I have no problem recommending him.
Customer in Reading Posted on 17/05/2021 , work completed 05/05/2021
The trader replied (on 19/05/2021)
Thank you for the great review. Jason
PV panels installation by Tethys Energy
Customer Service
We decided to install PV panels when we had our roof tiles replaced. Jason was recommended as a supplier and he was quick to respond to our request for a site visit and his subsequent quote was detailed and comprehensive. Throughout we were kept informed and he helpfully agreed to coordinate the installation to follow the roof work, meaning we could use the scaffolding for both jobs. We were very satisfied with the whole process from the initial enquiry through to after care and connection with Solar Edge monitoring and we would have no hesitation recommending Tethys Energy as a suppler.
Customer in Oxfordshire Posted on 10/04/2021 , work completed 12/02/2021
The trader replied (on 13/04/2021)
Great to hear about your satisfaction with Tethys Energy, thank you. Jason
Myenergi Zappi Electric Vehicle Charger installation
Customer Service
Jason installed the Zappi, ran new cabling underground from the garage, installed a new electric point in the garage, connected to the Hub, installed a new circuit breaker at the electric meter. Then made sure I understood how it all worked. Jason did a superb job with my installation. He was the only engineer, of the many I contacted, who actually visited my home to conduct a proper survey before giving me a quote. I highly recommend Tethys Energy.
Stuart in Wokingham Posted on 06/02/2021 , work completed 30/01/2021
The trader replied (on 17/02/2021)
Thank you Stuart for this amazing review, it's much appreciated. Jason
Removal and Re-installation of PV Panels
Customer Service
The felt on the underside of my roof tiles had perished and I had to have the roof stripped off for new felt to be fitted. This required my photo voltaic panels having to be removed and re-installed after the work was done. Jason priced for the work, removed the PV panels promptly once the scaffolding had been erected, and re-installed them when the roofing contractor had finished before the scaffolding was removed. Jason was extremely polite, tidy and the PV panels are back in place in full working order. I have no hesitation in recommending him for this kind of work, as he is highly professional possessing all the necessary technical and personal skills.
Customer in Oxfordshire Posted on 03/02/2021 , work completed 01/02/2021
The trader replied (on 03/02/2021)
A pleasure to help out, thank you for the teas!
Great Service
Customer Service
Jason installed a Zappi home charger which we had chosen with the potential of linking up solar panels at some point soon in mind. The installation went without any problems, Jason was very helpful and knowledgeable, the charger is excellent and works perfectly. I would recommend Tethys Energy and will certainly be asking Jason to add PV's when the time comes.
Customer in Wokingham Posted on 11/12/2020 , work completed 02/12/2020
The trader replied (on 14/12/2020)
Thank you very much for the feedback. Happy charging! Jason