GES Mechanical Ltd

Despite the installation going more or less to plan, since then their service has dropped off a cliff. It took over a month for snagging to be completed and two months later there has been no handover. Despite assurances of an annual service, and repeated emails on that subject none is forthcoming. I would think very hard before committing to them for works.

First class service from the GESS team from start to finish ! Panels and Tesla Powerwall linked to Octopus is a perfect combination! Thoroughly recommended. Call them now !

The communication from Gess was easy and efficient, and the arrangements were clear. The installation was quick, and the installers were friendly, knowledgeable and informative. I was really pleased with the whole experience, and the system appears to be delivering the results I wanted. Early indication is that I will get payback for my investment within 8 yearsPaul Dawson, East Ham London

I had both Solar Panels and ASHP installed. First the solar panels inverter and battery were fitted followed by the ASHP which required a replacement of some radiators and some new ones to meet the heat survey. All trades worked well together and as promised we were only with hot water and heating for half a day. I would highly recommend this Company as the sales and office support was as good as the technical phase

A very good service and installation by GESS the whole team from the office to the install where greatWould highly recommend Gess where not the cheapest quote , but delivered what we wanted to perfection .we felt very comfortable using a company with 13 years experience

Good communication throughout my experience. Always ready to answer any questions after installation. Very happy with this company would recommend.

I had a terrible experience with Green Eco Solar Solution (GESS) regarding my solar panel and Tesla Powerwall 3 installation. GESS provided a quote, which I accepted, and I paid a £500 deposit. I made it very clear that the council had revoked permitted development rights for new developments, meaning I needed to obtain planning permission. GESS agreed to wait for this. The contract was signed, and I was assured it was legally binding. A technical survey was conducted twice, and I was informed that everything was in order. Once I secured planning permission, GESS was unable to schedule the installation until February 2025.Then, in January 2025, they claimed that the quoted price was subject to change at any time and that they could no longer proceed at the originally agreed price.Despite the agreed quote, completed site surveys, signed contract, and deposit payment, GESS attempted to impose additional charges outside the contract. When I refused, they unilaterally cancelled my installation and refunded my deposit without my consent—an outright breach of contract. Communication was poor, with long delays and ignored emails. My Tesla account now shows two Powerwall 3 units registered under my name, adding further complications. This is completely unacceptable, and after escalating the matter, I received the following response from GESS:"Site surveys had identified increases in works required for your system, including ridge work, panel orientation and design, along with scaffolding requirements."I would not recommend this company due to their lack of professionalism and integrity.

Excellent service. Installed solar panels and battery. Workers were very efficient and nice people. I do recommend this company. Nice to do business with pleasant and accommodating people!

I've been looking for solar for almost two years and in that time I have seen the price go up and creep down. I never pulled the trigger as every single supplier never made the effort to come and visit us. Getting fed up with map surveys and online quotes on portals that don't load. I contacted Tesla directly for a Powerwall and solar, they put me in touch with Gess. Gess were different. Harrison, called me instantly and arranged a visit. We spoke about our unique requirements. As we install Building Automation systems (Loxone) we had a Loxone system in our property we wanted to integrate with our solar and had very specific requirements on the equipment we wanted to use, the location of the installed equipment and connectivity. Marlin (Gess' expert electrician) came and visited our site and made a brilliant unique plan to meet all our requirements, the whole team from Gess really went out of their way to accommodate us. The install happened over a couple of days, the lads were neat, tidy and very courteous. we've had our solar now for approximately 5 months (it's already saving us money on the utility bills) they still check in on us to ensure things are ok. I would happily recommend them over anyone else. I 'Gess' it speaks for itself if Tesla recommends them too.

Tesla Powerwall installA really professional approach, providing useful adviceon the whole domestic energy system (ASHPs, EVs, solar panels and tariffs). This has helped significantly reduce my energy bills & carbon footprint, using a staged-approach to ensure cost effectiveness.

Gess Renewables installed solar panels for me, and a battery a year later. They were friendly and easy to deal with and have been very helpful in following up any issues. I was glad to have found them, because they gave me far better advice than some other installers I contacted, and they are a genuine and trustworthy company.

The Tesla Powerwall 2 was very professionally installed by GESS and has been running since May faultlessly. The gateway is completely silent and the switch overs to and from the battery are unnoticeable. The whole system works perfectly and is easy to see on my iPhone exactly what is happening. Would highly recommend.

Had a great experience with Gess, installation for my solar and Tesla battery went smoothly, and scaffolding taken down as fast as it went up. Also recommended my family to have solar and they have since had their installation too.

When i have called up, wether it is for advice or problems they offer a great service, it is reassuring to know they are monitoring my system 24/7 to check for problems and identifying them before i need to call.

I have used GESS on 2 occasions now. Initially in 2017 to install solar panels and a powerwall 2, and most recently another powerwall 2 and a new gateway system that now allows me to charge the powerwalls overnight on cheap rate when needed. I found the whole experience really pleasant. The workmen were prompt, approachable and their work was clean and tidy.

After purchasing out electric car we needed a suitable home charger. We had used GESS a few years earlier to carry out a solar installation and service was excellent. As they already knew the system, they discussed how they could integrate the charger in with the solar. Price was competitive and service very professional. Installation was again prompt, clean and all cables tidy. Integration with the solar was seamless and we have been enjoying the benefits over the summer.

We have had a Solar PV system plus a Tesla Powerwall installed by Gess. I can’t fault the service that we have received throughout the purchase experience. From initial informal conversations at the warehouse, the site appraisal followed by the installation of both aspects of the project, we were treated in a friendly and professional manner throughout. The engineers, on both visits, took away all of the rubbish and swept up after they had completed their respective installations. Very happy with the service and would be pleased to recommend them to friends and family.

About 6 months after placing an order for solar panels + battery with barely any ongoing updates on timing.....we recently finally had the panels installed by a couple of nice technicians. Still no news on when the battery will arrive though. Not even an ETA. Unfortunately a technical fault was also reported the day the panels got installed (I guess the may not have checked it before leaving?) and after reporting it to the firm multiple times they finally confirmed it would require another visit scheduled for approx. 1 month after the original installation. I guess that can happen and they are very busy, but the problem is that they in the meantime are refusing to remove the scaffolding, which is currently blocking access to our bike storage. Most recently they have stopped replying to our requests for updates. Just ignoring us even though we have explained that we were never informed that they would block access to our main means of transportation (live in central London). Most solar installation companies are probably not easy to deal with as this is a bit of a "cowboy market"and GESS might not be an exception. Should probably have gone with Octopus or another established supplier with a strong focus on customer service.