Tethys Energy Ltd

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.

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.

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.

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.

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.

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.

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.

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.

In my experience it's rare to find a knowledgeable and passionate tradesperson that delivers what they say, when they say, all whilst providing a great service. I'm pleased to say Jason did this from first contact to final email confirmation. If we move house and it doesn't have solar panels there's only one person we'll call. Thank you for everything and all the best.

Jason Fuller provided a thoroughly professional service from start to finish. He was prompt, clear and courteous. He came to remedy a fault from work undertaken by another supplier, and his thorough investigation into the causes of the problem and what remedial works might be required went way beyond my expectations. As as result of his initial investigation, he was able to diagnose exactly what was needed. He recommended a new inverter and battery system and when this was delayed because of circumstances beyond his control, he was quick to communicate this issue. The installation work he did was done without fuss and was to a high standard. I am very satisfied with his work.