Endorsed by Which?

Tethys Energy Ltd

5.0

49 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

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About

Incorporated in 2013, Tethys Energy has been providing solar PV and battery storage solutions to home owners and businesses around Berkshire and the local area for a decade.

With extensive experience in the design and installation of these renewable energy systems and EV charging, we are proud to be members of Which? Trusted Traders and strive to provide a first class customer service through bespoke designs to meet our clients needs.

What we do

  • Renewable energy

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

    • Solar panel cleaning
  • Electricians

  • Electric Vehicles

    • Electric Vehicle Charging Points
  • More Services

    • solar pv repair
    • ev installer
    • 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.

5.0
49 reviews
Customer Service
5.0
Quality
4.9
Value
4.9
Sort by
Very professional work completed on schedule
Customer Service
Quality
Value
I chose Jason and his team at Tethys Energy following a recommendation from a close friend who has been very pleased with his solar panel installation and service, completed several years ago. Every aspect of their service, from initial survey, recommended system specification, installation and commissioning was first class. As a non technical person, I found Jason's advice and explanations very helpful in reaching my decision on how to proceed. The installation team were polite, hard working and cleared up each day. Admin back up was efficiently, politely and promptly provided by Louise in the office. I have no hesitation in recommending Jason and his team.
Customer in Berkshire Posted on 08/03/2024 , work completed 19/02/2024
The trader replied (on 13/03/2024)
I am very pleased that you are happy with the service provided by the team. Many thanks for this glowing review. Jason
Solar panel installation
Customer Service
Quality
Value
Our energy supplier surveyed our property using Google maps and told us our roof was not large enough for solar panels so we went to Jason for a second opinion. He visited us and surveyed the property and talked to us about what we wanted to achieve and then sent through a proposal. We liked his ideas and his technical competence and the fact that he had suggestions for us that we had not even considered. We agreed to proceed with the installation. Jason and his team arrived when they said they would, built the installation in the time they said they would and charged us exactly what they had quoted. They were incredibly professional and courteous and a pleasure to have around the house and their communication with us was outstanding from start to finish. We now have 16 full size panels on our roof, a GivEnergy inverter and battery, an Eddi diverter and full and complete certification and documentation. I would recommend Jason and his team to anyone considering a solar installation.
Customer in Berkshire Posted on 09/02/2024 , work completed 25/01/2024
The trader replied (on 14/02/2024)
It's great to hear that you are happy with the installation and the team. Thank you for your wonderful review.
GivEnery Backup EPS - Island mode
Customer Service
Quality
Value
Jason and Chris came to upgrade our GivEnergy setup to provide backup to the entire house in case of a grid power cut, this was not installed originally when Octopus installed my solar system, but I wanted to have it as we are now 100% electric house. Jason and Chris had never done the Island mode before, but they understood my requirements and got the documentation from GivEnergy to do this install and provide me with a solution that worked for my needs, and it was absolutely great. All worked completed as expected, with a very small delay due to some additional things and cable runs, but all done quickly and neatly as expected. Chris was always communicating clearly how things were going and when power would be down for tests, etc, so all in all a great service.
Customer in Berkshire Posted on 27/10/2023 , work completed 19/10/2023
The trader replied (on 02/11/2023)
Yes the changeover switch method was new to us as we'd typically install a separate back up consumer unit, so this was an interesting project for us to take on. Thank you for the great feedback. Jason
Fantastic service
Customer Service
Quality
Value
An almost perfect project from start to finish - just a couple of teething problems post commissioning which were quickly sorted. Can't thank the guys enough. Installed solar panels and an inverter and battery in four days.
Customer in Berkshire Posted on 26/10/2023 , work completed 14/10/2023
The trader replied (on 29/10/2023)
Thank you for your great feedback, I am glad we resolved the niggles and that you are happy with the installation. Many thanks,
Very professional. Tidy. Kept to time. Comprehensive documentation for solar installation, contract and deposit protection scheme.
Customer Service
Quality
Value
I had installation of solar panels, battery with power cut backup and hot water diverter. Jason did a full survey first and explained the options before sending a detailed proposal with estimates of power generation, potential cost saving and price for the installation. The deposit was covered by a protection scheme and the contract documentation very thorough. It was several months between the quote and work starting, but I was happy to have a long lead time in view of holidays and opportunity to consider alternative cable routes in my 1950s house. Work started to plan on a Monday and continued diligently through the week with the team of two joined by Jason on Friday to commission the system. All very well organised, precise, neat and tidy. My requests / ideas were listened to and after the first day I felt happy to go out to my usual activities while the job continued. Very happy with the work and performance of the installation.
Customer in Berkshire Posted on 26/09/2023 , work completed 15/09/2023
The trader replied (on 29/09/2023)
Thank you for this glowing review, the team and I greatly appreciate it. Jason
Outstanding tech know how and customer service.
Customer Service
Quality
Value
A thoroughly professional and polite group of people led by Jason. They all seem to be experts in this field. Nothing was too much trouble and the install never felt intrusive which it could easily be with the roof , loft, and most of the house in play at some stage. The system is now humming along with perfect weather during and after the work. Eddi’s heating water, Zappi charging car and Solaredge invertor and batteries ensuring that both electricity and gas meters have been stationary since commissioning. Jason was very busy when we enquired last year and we had to wait our turn but we were so lucky not to have ventured elsewhere after curiosity got a couple of salesmen in during the interim. I would be surprised if anyone Jason works for could have expectations that go beyond what he will provide.
Customer in Oxfordshire Posted on 01/06/2023 , work completed 25/05/2023
The trader replied (on 07/06/2023)
It's great to hear that you are happy with the installation and the team. Reading reviews like this is why we do it. Many thanks - Jason
Excellent Work & Very Helpful
Customer Service
Quality
Value
Jason and his team did an excellent supply and installation of cabling from house (consumer unit) to detached garage, EV Charger, PV Panels with bird mesh protection and storage battery. He was also the ultimate, helpful and knowledgeable professional, answering all my inane queries before, during and after the installation. Superb quality workmanship from start to finish, and very reasonably priced. HIGHLY RECOMMENDED.
Customer in Berkshire Posted on 01/06/2023 , work completed 05/05/2023
The trader replied (on 01/06/2023)
Thank you for this amazing review, I really appreciate it.
Another quality job
Customer Service
Quality
Value
Jason and his team added a GivEnergy battery to my existing solar panels (also installed by Jason). Provided best value for money compared to other products/providers and the job was done within the price and timeframe. Jason was again very helpful in keeping me informed. The job site was clean and tidy upon completion.
Customer in Berkshire Posted on 13/12/2022 , work completed 08/12/2022
The trader replied (on 14/12/2022)
Many thanks for the wonderful feedback. Have a great Christmas & New Years. Jason
Excellent Work - highly recommended
Customer Service
Quality
Value
Upgraded my solar energy system to have a couple of batteries. Jason did a great job and kept me up to date regarding delivery, fitting day etc. My opinion hasn't changed since Tethys installed the solar panels. A great company which I would have no hesitation in recommending.
Customer in Berkshire Posted on 14/11/2022 , work completed 09/11/2022
The trader replied (on 15/11/2022)
Thank you for the kind words. It's really useful to have this feedback.
You do not need to go anywhere else
Customer Service
Quality
Value
I have used Jason for the installation of solar panels and more recently a battery pack. On each occasion he has been the ultimate professional. He gives excellent quotes and ensures you are happy with the work intended to be done. All work s guaranteed and is backed by indemnity insurance against his company going out of business. I am not aware of any other trader who does this. He turns up on time and works to achieve the agreed timelines. He is very knowledgeable on his subject and works towards giving the customer what he wants. His after-sales support is second to none as I have had some questions about possible cost-saving updates and he is always available to give his advice. To sum up - you will not be unhappy to involve Jason in your projects. The one problem he has is that he does not have enough time to take on new business but hopefully, that will change in the future.
Customer in Berkshire Posted on 21/07/2022 , work completed 09/07/2022
The trader replied (on 24/07/2022)
What a great bit of feedback, thank you so much. Jason