Customer Reviews

Green Hat installed 14 panels and a GivEnergy battery for us. The team was professional from survey to commissioning. Our electricity bills have dropped from £140 to £30 per month, and we're earning from the Smart Export Guarantee. Genuinely transformative.

Had a 5kW system fitted on our period property near the high street. Green Hat handled the planning considerations with real expertise. System has been generating brilliantly — even through the winter months we're seeing meaningful savings.

We replaced our ageing oil boiler with a Daikin heat pump. Green Hat managed the entire BUS grant application and the installation was completed in three days. Our home is warmer than it has ever been, and we've eliminated our oil delivery costs completely.

Green Hat fitted a 50kW system on our grain store roof. The team understood agricultural buildings and worked around our harvest schedule. The system is generating significant income and has been running flawlessly since installation.

We wanted the full package — solar panels, battery storage, and an EV charger. Green Hat designed a system that powers our home and charges our EV almost entirely from solar. The monitoring app shows we're 85% self-sufficient in summer.

Whole-house renovation including heat pump and underfloor heating throughout. Green Hat coordinated everything expertly. The house is incredibly comfortable — even, consistent warmth in every room. The £7,500 BUS grant made it very affordable.

Had a 30kW system installed on our warehouse at the Enterprise Park. Green Hat handled everything from structural assessment to DNO application. We're saving over £6,000 per year on electricity and the payback will be under 4 years.

Our 1950s solid-wall house was freezing in winter. Green Hat insulated the walls externally and installed a heat pump. The house looks refreshed from outside and it's a completely different home inside — warm, quiet, and our heating bills have halved.

We had a 6kW system installed on our detached house. Green Hat were the most professional of the three companies we quoted. The installation was done in a day and the system has been producing consistently above their estimates. Highly recommended.

Green Hat installed a 20kW system on our business premises at Broadland Business Park. The team managed the entire process including DNO paperwork and MCS certification. We are seeing significant savings on our electricity costs and the environmental credentials help with our clients.

Brilliant service from start to finish. The survey was thorough, the quote was competitive, and the installation team were tidy and efficient. Our battery captures all the excess solar during the day and we barely use grid electricity now.

We were sceptical about heat pumps working in our older property, but Green Hat assessed everything properly and recommended the right size unit. The house is warmer than it ever was with the gas boiler, and the BUS grant covered nearly half the cost.

Had 80kW of solar installed across two barn roofs on our Fenland farm. The panels are generating huge amounts of electricity — the flat terrain and open skies here are perfect. Green Hat understood farming schedules and worked around our operations.

We went for the full package — solar panels, battery, and heat pump to replace our oil boiler. Green Hat handled everything as one project, which made it much simpler. Our annual energy costs have dropped from over three thousand to under eight hundred.

Green Hat were recommended by our neighbour and we can see why. The survey was thorough, the quote was clear and competitive, and the installation took exactly one day as promised. Our system has already generated over 4,000 kWh in its first year.

Our old oil boiler was costing us nearly £2,500 a year. After the BUS grant and 0% VAT, we paid just over £3,000 for the heat pump installation. Our heating bills are already below £900 and the house is warmer than ever. Green Hat managed the grant paperwork entirely.

Very impressed with Green Hat. They installed a 6kW system with SolarEdge optimisers on our partially shaded south-west roof. The panel-level monitoring shows every panel performing as expected. Bills have dropped significantly — very happy with the result.

We added solar and a Zappi EV charger in the same installation. Now we charge the car on solar for free during the day. Green Hat coordinated everything and the installation team were excellent — tidy, professional and on time. Would not hesitate to recommend.

We had 40kW of solar installed on our food packaging unit. Green Hat understood the commercial process — DNO application, structural survey, metering — and managed it all. We are generating significant amounts and the export income is an added bonus.

We had never heard of the £7,500 BUS grant before Green Hat mentioned it. They checked our eligibility, applied for the grant, and managed the whole process. The heat pump is brilliant — the house heats up faster than with the old gas boiler and is more consistent throughout.

Green Hat installed 12 panels on our detached home. The team were very professional and left the property spotless. The monitoring app is excellent — we can see exactly how much we are generating and saving in real time. System is performing above expectations.

We did the full whole-house retrofit — solar, battery, and heat pump replacing our gas boiler. Green Hat phased it perfectly. We are now almost entirely energy self-sufficient in summer. The annual saving on energy bills is over £2,200 compared to two years ago.

I had solar panels installed three years ago by another company. Green Hat assessed my existing system and added a GivEnergy battery perfectly matched to my inverter. The difference is remarkable — I used to export almost everything during the day; now I use it all myself.

From the free survey through to being switched on, the whole process with Green Hat was smooth and professional. They arrived when they said they would, finished the installation in a day, and were careful to protect our roof tiles and leave everything tidy. Excellent service.

Brandon is fairly off the beaten track but Green Hat were very responsive. They recommended a 5kW system with a 9.5kWh battery which has been perfect for our usage. The Octopus Intelligent tariff combined with the battery means our evening electricity is basically free.

Green Hat fitted a large ground-mounted system in our paddock. The planning application was handled by their team and approved without issue. The system generates more than our entire farm energy usage — we now have a net export income as well as zero electricity bills.

Our property is off the gas grid and we were spending a fortune on LPG. After the heat pump, our heating costs have dropped by over £1,400 per year. Green Hat explained everything clearly and we are delighted with both the installation quality and the ongoing savings.

We upgraded to an EV at the same time as installing solar. Green Hat installed a Zappi charger that intelligently uses surplus solar to charge the car. We have barely used any grid electricity for driving since the system went in. Brilliant investment and brilliant service.

Green Hat installed external wall insulation on our 1960s semi. The house looks completely transformed and the warmth difference is immediate. We have since added solar panels and a heat pump — Green Hat coordinated all three phases and the whole project was seamless.