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Solar Panel Calculator

Our easy-to-use solar power calculator can help you estimate the potential benefits of installing a solar photovoltaic (PV) system. It’ll take into account your location, energy usage, and other factors to provide you with an estimate of your fuel bill savings and potential payments.

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How much could you save?

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  • Save 70% on average on your electricity bills
  • Expert advisors with decades of experience
  • Partner with Growatt, the No. 1 global supplier
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How to Use the Calculator

To use the solar panels cost calculator, you’ll need to provide some basic information about your home, including your roof size, the direction your roof faces, and your average energy usage. You’ll also need to select your location and the type of solar panels you’re interested in.

Once you’ve entered your information, the calculator will generate an estimate of your potential benefits. The estimate will include the following information:

  • The amount of electricity your solar system could generate each year
  • The amount of your fuel bill that could be saved each year
  • The potential energy grants or funding payments you could be eligible for

Start using the calculator using the form below! Find out how Grant Store can help you secure free solar energy.

How much could you save?

Trustpilot
  • Save 70% on average on your electricity bills
  • Expert advisors with decades of experience
  • Partner with Growatt, the No. 1 global supplier

Our Accreditations & Brands We Work With

  • jinko-solar-logo
  • huawei-logo
  • giv-energy-logo
  • growatt-logo
  • fox-ess-logo
  • viridian-solar-logo
  • esdec-logo
  • solar-edge-logo
  • solis-inverters
  • schletter-logo
  • lg-logo
  • Tesla Energy
  • Construction Line
  • JA Solar
  • Gas Safe Register

Frequently Asked Questions

How do I calculate how many solar panels I need?

The number of solar panels you need depends on your annual energy usage, the efficiency of the solar panels you want to use, the amount of daylight you get, and the area of your roof.

Just use the solar calculator or speak to one of our solar installation experts instead; it’s far easier!

How much electricity do you get from one solar panel?

The amount of electricity you get from a solar panel depends on a number of factors, including the efficiency of the panel, the amount of daylight it receives, and the temperature. In general, a typical solar panel can produce between 250 and 400 watts of electricity per hour in full daylight. This means that a single solar panel could generate between 0.5 and 0.8 kWh of electricity per day.

How many solar panels are needed for 1 kW?

Three panels should be enough to generate this amount of electricity.

How much power does a 4 kW solar system produce per day?

Taking the various factors mentioned above into consideration, a 4 kW system would typically produce between 16 and 24 kWh of electricity per day in optimal conditions (based on between 6 and 10 hours of daylight ).

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J

What a great company to bring in to your home.arrived on time,was told what was to be done with the boiler. And after that the job was carried out with out fuss/mess. Acouple of great fitters, and very friendly office staff. All followed off by anice friendly inspection by a senior member of grant store. Will highly recommend this company for any work you need doing from the office staff upto the inspector who calls invited within 24hours. Many thanks.

James Prendergast

P

I have Alzheimer’s, so don’t like disruption . Grant store were brilliant . The men’s who arrived to fit , boiler , underfloor insulation , & hive , were fantastic . House left spotless . Thank you all for fantastic customer service . You are a credit to your profession . Regards & thanks . Paul .

Paul Birchall

K

The fitters arrived spot on time and both worked hard informing us exactly what they were going to do,Rob+Paddy were very professional and were good reflection for grant store. boiler installation was great but let down by not having a electrition on same day

Keith Ward

J

Fantastic service from first contact to fitting. Call centre staff very informative, 1 simple form to complete then sign online. 1 week later boiler fitted. Surveyor and gas fitters very professional and everything cleaned up afterwards. Thanks.

Joanne Astin

S

Had solar panels installed by Grant Store and the whole experience greatly exceeded expectations. The process was very smooth, from the booking, to the communication of the steps, through to execution. It's a 3 day process (actually 3 half days). The scaffolders, the roofers and the electricians all arrived as expected and just got on with the job and all of them were friendly and communicated well. I don't usually leave reviews but this level of service deserves recognition

Steve P

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