T4 Sustainability Limited

We are very happy with the PV installation we have received from Ed and the team. T4 were able to accommodate a design and install at relatively short notice so that we could take advantage of suitable scaffolding already in place for external wall insulation work. The survey was thorough and the quote was detailed and easy to understand. The team were able to work along side the other company working on the external insulation. It turned out my electrical earth bonding wasn't up to scratch but this was rectified really well. Even with this slight setback they were able complete the install in time for the scaffolding to come down on time. They even repositioned my TV areal to avoid birds messing on the panels. The install was finished neatly and no mess was left. The system was explained to me at the end and they help provided all the details I needed to apply for the Octopus Outgoing tariff. The system has been working well all summer and I have received my first payment back from Octopus Outgoing. Thank you T4 and I will be back in touch in a few years If I can save some pennies to add on battery storage.

Excellent service. Dealt with what was a difficult installation due to our requirement as well the nature of our house and garage, and produced a aesthetically pleasing and effective result.

I have used this company now for a number of years to service and maintain my biomass boiler. They have always attended promptly and on the day the said they would or let me know if there was a problem phoned me in person to explain and arrange to come the next day. They provide a professional service and respond to any request quickly with a message or in person. I have no hesitation in recommending this company to anyone needing their heating system repairing or replacing.

T4 installed a set of photovoltaic panels on our roof. It was a far from straightforward job and took longer than expected, but Paul and the team did a great job and were helpful and friendly with good communication throughout.

Excellent team who know what their doing and stand out against the competition. Thorough backup service also.

Clear and prompt communication, helpful, organised, reliable, delivered quality work. Thanks!

T4 were excellent installers and very helpful when a had a problem with a hard to access cracked tile. All through I have had good customer service (installed in 2013).

T4 Sustainability recently fitted our Solar Thermal system through the Green Homes Grant, they were fantastic. Simon and the team were professional, prompt, and did everything they could to fulfil our needs after a previous supplier dropped out. We can not thank them all enough.

Ed Sears designed and led the installation of our Air Source Heat Pump, Solar Thermal and PV system. I have been so impressed with the level of service and the quality of the installation. John Beardmore was a huge help on developing our home energy monitoring system and Paul Chandler installed our battery quickly and efficiently. They worked well with our on-site electricians, DNO, plumbers and scaffolder ensuring contracts were well integrated without any needless delays. If you go with T4 you are going to get really excellent engineers who care about what they are doing. Thank you all so much!

First-rate service from T4 Sustainability. They used a system to fit solar panels which meant no drilling or damage to the newly reslated roof. Excellent communication throughout.

This company have a genuine commitment to sustainability, and are in it for the long haul because they believe in it. They are good to deal with and do a good job. Recommended!

Did exactly what I wanted. My solar panels have been installed in less than three days. Polite professional and I am so enjoying watching the electric roll in on sunny days and charge up my battery

T4 were great in installing my Solar, Tesla PowerWall and ASHP. Good communication and very professional.

Simon has done an excellent job repairing our solar panel this year. We have enjoyed much hot water since. Thank you

Was impressed by the enthusiasm and expertise and price. Everything happened quickly and on time. Extra education provided and a genuinely friendly experience. Top Marks! Thank you...will use in future.

Great team to work with

T4 Rocks! Green solutions with the highest integrity.

Would recommend this company. Really helpful, friendly, great for advice. Efficient service with great communication.

They have serviced and repaired my biomass boiler for several years and have always provided a good reliable honest service

Accurate advice for green power, energy efficiency and heat conservation