Positive experience. Polite and efficient.
We are an established company with over 35 years of experience in providing renewable energy systems to both commercial and domestic customers
Commercial & Domestic Renewable Energy Specialists
I need
a Heat Pump service
GSM Limited
Saving energy; reducing costs; improving comfort: these are all things that every business and homeowner should be focused on achieving, and at GSM Ltd, we can help you do just that.
As a trusted engineering partner, we specialise in the design and installation of integrated solar, heating, and cooling systems. Our highly skilled in-house CAD team and dedicated project management department draw on over thirty-five years of industry experience to deliver cutting-edge solutions engineered to maximise efficiency across any indoor environment.
Whether you are looking to future-proof your family home or optimise a complex multi-zone commercial facility, we provide tailored, high-performing systems built around your specific needs.
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By completing our quick form, you will be able to book an appointment at your property or premises at a time that suits you.
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Complete our form to schedule a call with a surveyor to discuss your ideas and options at a time that works for you.
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Commercial Properties: Our Services
In an increasingly regulation-driven landscape, achieving energy effectiveness is essential for long-term operation efficiency and environment compliance.
Our team at GSM Ltd provides expert guidance and tailored installations for the retail, commercial, and industrial sectors, as well as partnering with architects, consultants, and developers.
Our approach is designed around your operations. We carefully phase installations to ensure minimal disruption to live sites.
From advanced Building Management Systems (BMS) for centralised monitoring to independent multi-zone temperature control, we ensure your facility operates seamlessly without wasted resources.
Reliability and ROI remain the core focus across every installation, including large-scale solar arrays for green compliance, robust heating solutions, and highly efficient air conditioning.
Domestic Properties: Our Services
With rising energy prices and a growing emphasis on sustainability, investing in the right home energy system is a smart, long-term decision.
At GSM Ltd, we understand that every home is unique, which is why we assess your current setup and future goals before designing a bespoke solution.
We specialise in fully integrated home ecosystems.
Whether you want to reduce your reliance on the grid with solar panels, add an EV charger to your driveway, or upgrade to a smart heating and cooling system, we ensure every technology interacts efficiently.
Even if you are just planning for the future, we can design an adaptable system that evolves alongside your household’s energy needs.
From consultation to installation, there is no domestic project too complex for our engineering team.
Why GSM Ltd?
Choosing the right energy partner is about expertise, quality, and trust. We combine decades of experience with a fully in-house approach, meaning we never rely on subcontractors.
When you work with us, you are working with directly employed engineers and designers who are passionate about creating high-performing systems installed to exacting standards.
- Mitsubishi Electric Diamond Partners: we are recognised for our proven technical expertise, granting our clients access to industry-leading equipment, extended warranties, and full technical support.
- In-House CAD Design: we develop fully coordinated system layouts tailored precisely to your building, maintaining total control over quality and delivery.
- Complete Lifecycle Support: our service doesn’t stop at installation. Every client receives full commissioning, training, Operations & Maintenance (O&M) documentation, and the option for long-term maintenance support to give you total peace of mind.
GSM Ltd has consistently demonstrated professionalism, technical competence and a genuine commitment to delivering successful outcomes. Their approach has given us confidence throughout the programme, and the combination of high-quality installations, robust health and safety management and effective communication has made them a valued delivery partner.
Charles Newman
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.
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 great experience all round. I would recommend GSM to anyone considering a solar installation – in fact I have many times already!!
Sam Macleod
Great company, very helpful and answered lots of questions. Very neat installation, thank you.
Mr & Mrs Hopkins
100% Recommend GSM Solar panels etc efficient, tidy polite workmanship.
Sue Harding
GSM Ltd delivered a technically complex renewable energy project in a sensitive public setting with a high degree of professionalism, attention to detail and care for the client’s requirements. Their proactive communication and clear project management structure meant that we were always informed, supported, and confident in the success of the installation.
I would have no hesitation in recommending GSM for future solar PV and decarbonisation works on similar public sites
Brendan Oakley
A very efficient, friendly and considerate team at both the planning, installation and post installation visit.
Martin Thomas
GSM have demonstrated a consistent ability to design optimal, site-specific solar PV systems that maximise performance while remaining sensitive to the operational and structural limitations of each building. Their team has engaged collaboratively with our supply chain of consultants — particularly on structural assessments — helping to expedite technical approvals and avoid unnecessary delays. Their early engagement with structural engineers and proactiveness in resolving loading queries has streamlined the delivery process considerably.
GSM Ltd have delivered our solar PV projects to a very high standard. They bring strong technical understanding, dependable project management, and a genuine interest in delivering wider value for our district
Andrew Dike
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
John Whitehead
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.
Mike James
Service Areas
We offer our services across Gloucester, Cheltenham, Worcester, and Hereford, having grown a reputation as one of the top energy and HVAC solution providers in the region.
Get in Touch
Whether you are looking for solar panel installations, commercial heating, or domestic air conditioning, your property is an important investment.
With just a few steps, you can start making that investment more efficient than ever. We’ll handle the rest.
