Our 4kW offer includes:

  • 10 x 400 watt Tier One Solar Panels
  • 1 x Solis 4000 Inverter with 5 year inverter
  • All Mounting and Ancillary Components
  • Full Installation and Commissioning
  • 10 Year Insurance Backed Guarantee

  • 10 Year Workmanship Warranty

  • All Certifications (MCS, Electrical, DNO, Roof Structural)

  • 25 Year Performance Warranty on the Solar Panels

  • Includes Scaffolding for one and two story properties*

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4kW Returns*

Total Savings on Electricity and Payments from the Smart Export Guarantee Scheme p/a

Total Benefit in Year One

Home all day £355
Home half day ££326

Total Benefit over 20 years

Home all day £13,073**
Home half day £1,996**

Payback Year

Home all day 7
Home half day 7

Total Benefit in Year One

Home all day 12.2%
Home half day 11.44%

*Returns based on south facing roof with a 39 degree pitch and no shading.

Smart Export Guarantee Payment of 5.4p p/kW

Electricity Savings of 18p p/kW

**20 year total benefit is based on 3.2% inflation and 6% energy inflation.

Solar panels on a roof

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Prices for other sizes

  • 4kW system only £5,450* inc VAT
  • 8kW System only £10,160* inc VAT
  • 10kW system only £11,215* inc VAT
  • *The Prices Quoted are for Guidance only based on Material prices at the time and availability of Stock etc.

What are the typical savings?

A typical 4 kilo watt solar PV system will provide you with 3,852 kilo watts hours (units) of electricity.

When you generate your own electricity you do not buy from the grid, and at current prices, and the inevitable continuing increase of electricity prices, it can save you thousands.

Earnings & Savings


Solar PV systems produce electricity during daylight hours even if the sky is overcast. As long as there is light you will generate your own electricity.

Solar PV can provide all your daytime electricity.

Why choose Green Building Renewables

Why choose us?

Our aim is to help every customer lead a more sustainable life. We proudly install and maintain a range of low carbon technologies that can help you become more energy independent by harnessing your own solar energy or keeping you warm with highly efficient heating systems – all whilst lowering your carbon footprint.

What do we offer?

We offer tailor-made environmentally-friendly solutions to meet your future energy needs. Our team of experts and in-house installers design, supply and fit solar panels and battery storage, air and ground source heat pumps, underfloor heating and EV charging points.

Why are we different?

Our success is based on demonstrating our expertise, making renewables understandable and building trust. The proof in the pudding is our range of industry awards, the host of easily digestible blogs, our 2 year workmanship warranty and our award-winning, 5 star TrustPilot service.

See what our customers say about us

Our award winning team

Business Development Manager award
Solar PV installer 2023 award
solar small project award
renewable heat installer award