GSM Ltd

The team at GSM were fantastic from start to finish. Allan took my initial enquiry for my Heat Pump issue and despite it not being a GSM install, was was very attentive. Cal the Heating Engineer did the initial survey and gave me an overview of the issue and a workable solution. James then attended to do the repair, 30 minutes and the heat pump was up and running. Great service, helpful team and a working heat pump = happy tenant/happy landlord.

Short lead-in time, GSM does exactly as promised. Installation went really well with friendly and efficient installers. Excellent office back up if required to help with paperwork or how to get the best from quite a complex system.

I recently had solar panels installed by GSM, and the experience was fantastic. The team was professional, efficient, and explained everything clearly. The installation was quick, and I’ve already started seeing savings on my energy bills. I’m really happy with the results and would highly recommend GSM to anyone looking to switch to solar!

Professional and helpful at every stage of the process of installing solar panels and battery

I bought solar panels and batteries and the whole end to end experience was excellent. From survey to installation including promptly answering my queries, a great installation team who were polite and very helpful. I'm really pleased with the end product which was installed in a week. I'd recommend this company. Nice job guys. Thank you. 👍

So pleased I had my ground source heat pump and solar panels installed 5 years ago now. Old stone cottage has never been so cosy and warm and I highly recommend GSM for their detailed explanations, swift and efficient fitting and excellent follow up and ongoing support.

From first telephone call through to installation and setting up, with lesson on how to use and patience of a saint. Would highly recommend.

A really professional solar installation. A very smart job done.

An excellent installation from a totally professional team. The whole team had an eye for detail and I would certainly recommend GSM to anyone requiring solar/renewable energy. A first class installation well worthy of five stars that I have awarded.

I have used GSM for a couple of houses, most recently for solar installation and their team have been very good throughout.

Excellent company. Knowledgeable and helpful staff. Professional service and after support with great communication. Would definitely recommend

Can't praise the team enough for the Solar / Battery install they completed for me in January 24. Had 16 panels, 5kW inverter and 9.5kW battery from GivEnergy installed. Team are knowledgeable and professional, throughout the installation everything was clean and tidy. The routing of all the cables is very smart, being mid terrace I didn't want to see the cable routes, the team was able to sort this out. Both the Electrician and Roofer were diligent, from making sure that the panels were centred on the property to the location of the inverter and battery to ensure the optimal position. Actively considering having the team back to replace the gas boiler with a heat pump.

Recently had GSM install 16 Solar Panels and a 13.5 kWh battery with inverter. I also had the consumer box replaced. This was a highly professional and efficient service with both the roofer and electrician working tirelessly to complete the installation on time. I was given an excellent quote and schedule that was adhered too. I would highly recommend this company for anyone considering Solar Panel installation as they were excellent from start to finish.

Great service and quick installation. I had GSM install 2 Tesla Powerwalls 2 years ago and was very pleased with their service back then, so I decided to go back to them to have a 3rd battery installed just now. They were able to quote and install within a week of my initial enquiry. Greatly appreciated!

Really good experience dealing with GSM. The PM, engineers and roofers were all very helpful, knowledgeable and affable. Very tidy job. Had a few concerns that the Team listened to and then addressed without any fuss. The system is working well. Certainly recommend them.

Could not be happier with all workers was professional from start to finish. Richard the electrician was very friendly neat and tidy would definitely recommend GSM to anyone that asked ?

Brilliant brilliant service, came out within the hour to solve our flood and ground source heating problems. Greart service and great advice, thoroughly recommend.

I had GSM install a PV system with battery at my property, from the initial Emails with Allan, site survey and through to completion of the works, i couldn't fault GSM. They provided a detailed plan, very competitive quote and most of all the the work they completed was exemplary. I would definitely recommend.

Friendly, efficient and good communication.

Shane and his team are amazing and have done a very professional and excellent job. Have had a 8.5kw system with a battery pack installed and additional cabling to future proof it. They are always on hand to explain the workings of the system and make adjustments if required. Highly recommended

Excellent service from beginning to end and very pleased with the solar system installed by GSM

GSM have been first class from start to finish of our solar panel correction job, (the previous installation by a different firm was defective and sub-standard). The booking of the first inspection visit was extremely simple to do on their website, as was booking for the job to be completed. I got to choose the date. The workers were polite, efficient and considerate and tidied up after themselves. The quality of workmanship appears to be first class. I am very happy to recommend this company for solar panel installation.

I was very nearly giving up on the idea of solar panels after so many pushy sales people and let downs until I found GSM online and sent an email. From that initial reply phone call I have received a quick very smooth installation from considerate polite professionals. Thank you All

GSM have provided the best customer service; from clear initial quote, to polite efficient installers and out of the way helpful tech support getting everything up and running. They made my solar panel installation really easy and I would (and have) thoroughly recommend them. They are a pleasure to deal with, and go out of their way to make sure they look after their customers.

From start to finish we have had an excellent experience with this company. The initial contact and site visit was professional and gave us confidence to place the order. The installation was delayed due to unplanned disruption on our part and poor weather. This was not a problem for this company and dates were moved to accommodate both sides. Once the installation started the staff were great and very efficient. The finished job is neat and exceeded our expectations. We are very happy with the job and would gladly recommend gsm ltd.

Installing solar panels at home has been a seamless experience from a desktop quote and on site visit by David Pratt, through to calm but enthusiastic installation by Will and final sign off by Shane. GSM have been brilliant, keeping to timings and offering on-going support to our questions even after they left the site. We have 15 panels and a battery fitted on a bungalow. The work started on a Monday and was completed by the Thursday morning. We are now addicted to our energy app measuring the amount of electricity we are downloading (from the sun) for free and how much the different appliances use. We may need to visit a therapy group to prize ourselves of this! Highly recommend GSM Ltd.

GSM was recommended by a local electrical contractors, who had worked with them before. David came to do the survey within a few days of me contacting them and everything was fitted and working in a couple of months. The solar panels and batteries are a great combination and allow me to sell the additional energy I generate and they have greatly reduced my energy bills! The app is great to monitor my usage and the support team have been great in helping me to understand how it all works and saves me money! Highly recommend GSM 😁

We have had a solar system installed by GSM. During the quoting phase, they worked with us to provide what we wanted and helped us specify a system that would work the best with the conditions that we have. We needed to do some work on the roof and GSM were very obliging about organising the scaffold to be installed earlier so that we could do the roof work prior to the solar being installed. The equipment was available for installation at short notice. Once the system was installed and working, they provided a good handover and showed us all the settings to help us get the best out of the system. In the first few months, there was an issue with the hot water controller. This unit was replaced without any question.

A 3.2kW system installed on a raised seam metal roof on a stone built out-building. Eight JA 400w black panels tilted at 30 degrees are wired as two strings on four panels. The Solax inverter and 5kWh battery are installed in the room below. A pre-existing underground 4mm SWA cable and a CAT5 Ethernet cable connect back to the house metering. Note the spacing between the two rows of panels and the use of half cell panels to minimise shading in the winter months. We were able to discuss with GSM ahead of the installation in order to provide a solution and equipment that met our requirements. All professionally installed easily within 2 days. There was a short wait for the triangular mounts. As a heavy user with an EV car and electric AGA, the battery storage on a sunny day provides most of the power used in the afternoon and into the night. We do not export very much but our off grid consumption is noticeably reduced. I can only award 4 1/2 stars as the handover document contains several errors which do not accurately reflect the equipment and system finally installed since the initial quotation. Could do better! G&J, home owners, Coleford

Fantastic service. Simple process to get PV installed, good communication from the team and installation went well. Thanks.

GSM were incredibly helpful throughout my solar and battery installation - from initial enquiry, site visit, multiple in-person and email questions during installation and the handover. The installation team were reliable, thorough and the final setup is excellent - thanks to the whole GSM team for everything so far. I am also really impressed they completed what may sometimes be a 5-day job in 4 days. A superb service and highly recommended.

Great company , they did a very Fast high quality install from quote to order to up and running solar and battery storage within a month.

Positive experience. Polite and efficient.

Excellent service from start to finish. After being repeatedly let down by other installers I was nervous but the GSM team delivered exactly what I needed when they said they would, quickly and efficiently. The entire Solar system was up and running in less than a day! Very pleased with the install

We were given a competitive price Conscientious friendly employees did an excellent job Work completed within their time frame Sales person Allan knew what he was talking about which is rare these days We would highly recommend this competitive company

GSM have installed a ground source heat pump, 14 panel solar array and powerwall at our property. The quality of their installation is top notch and they were great at solving all the inevitable stumbling blocks that occur in construction works. A real can-do attitude and enthusiasm for the work

GSM were very professional throughout the whole process. The workmen were extremely polite and tidy whilst on site. The solar panels are working very efficiently to supply our electricity needs ( even in this summer!). A slight issue was rectified to a very high standard. All queries have been dealt with quickly and efficiently. Would definitely recommend them.

We found GSM to be a very professional company, from the initial contact through to installation and handover. Everything was explained clearly and the work was completed in a timely manner. All members of the team involved were very friendly . We would certainly recommend GSM to others.

I was prompted to look at Solar by a local authority "Solar Together" initiative. Having got an "estimate" and outline through that scheme I had my doubts about the costs. I decided to contact local firms and GSM were recommended by a friend. I have to say I was very impressed with the whole process. Allan Farr was our PM - he came out scoped the installation and provided a detailed quote the same day. GSM were much more competitive than the previous estimate I had and the proposed installation and equipment felt better all round. We decided to go with GSM. The booking process was straightforward. The installation went like clockwork. Equipment and people arrived on time, were very neat, tidy and considerate when working in our house and very easy to get on with. System was installed in line with the schedule and commissioned and working immediately on completion. Allan was on top of everything throughout and visited after completion to go through all operating instructions and to provide all the necessary documentation to make sure we were happy. A month on, system is working as advertised and if anything over-performing output estimates. A great experience all round. I would recommend GSM to anyone considering a solar installation - in fact I have many times already!!

Competitive price, excellent workmanship. All members of staff that we dealt with were pleasant, friendly and informative and always took time to explain any issues we were unsure of, from the initial discussions to handover and since. We certainly would not hesitate in recommending GSM to anyone considering installing Solar panels

Great company, very helpful and answered lots of questions. Very neat installation, thank you.

Just had a large Solar and battery storage system installed. Quite a complex system with 23 panels spread across house and garage roof giving a 9.2kw capacity along with 23kw battery bank. Less than 3 months from initial contact to completion with the actual install commencing on the originally agreed date and finished in a week. Fantastic team, did an excellent job, very high quality of work, great attention to detail, polite and considerate. No cost surprises either, final amount was as per quote. Unlike many others their terms of business was NO Deposit, first payment once equipment delivered, balance after it was all working. Would have no hesitation in recommending them.

A very efficient, friendly and considerate team at both the planning, installation and post installation visit.

What a pleasure doing business with this company! We recently installed a 4.1KWh Solar PV system with Battery Storage. GSM were without exception, prompt, professional, and did what they said they would, when they said they would. Installers were professional, friendly, neat and tidy, and went above and beyond to ensure my installation was what I wanted and needed. Still getting to grips with the shedloads of data from the system but we have not spent a penny on electricity in the week after installation. Yes, it's early May. But we are super impressed and feel that GSM deserve as many stars as you can give them. If you've read this far down..., we had contacted over 10 other suppliers to get quotes and got very few returns. None of whom could deliver in the timeframe reasonable. From quote to installation was 3 months and most of that delay was waiting for better panels that we agreed upon post initial quote. So, Allan and Sid, Darren, James. THANKS. We look forward to years of cheaper energy and some small relief for our planet too.

Fantastic service and installation, highly recommended

100% Recommend GSM Solar panels etc efficient, tidy polite workmanship.

GSM Heating and air have given me absolutely dreadful service. I have been chasing their repair on work they have commissioned that has gone wrong for 4 weeks and they constantly ignore all calls. I have had to contact my solicitor. I would thoroughly discourage any individual or business from considering them.

Just had a solar PV and battery storage system fitted. GSM have done a brilliant job, quote was exactly what we wanted, job started with a few weeks of the quote being accepted. Work has been carried out quickly and efficiently, carried out by friendly, polite and courteous staff who were a joy to have around. Well done GSM

Quality Customer Service