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NXTGEN Energy  » Solar Panel Calculator UK

Solar Panel Calculator UK

Enter the Solar Panel System size, roof orientation, roof tilt angle and the installation cost of your solar panel system and click on the calculate button to see the estimated solar PV system output, your potential savings, your potential earnings, your estimated payback time and your return on investment (ROI) of your Solar PV System.

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Use the Solar Panel Calculator UK for an idea as to the benefits you may see from installing a solar photovoltaic (PV) system on your roof.

This calculator gives estimates based on the details you provide, and it makes a number of assumptions to indicate potential benefits. This is to help you decide whether a solar PV system is right for you.

Use of the calculator and its outputs is not a guarantee that you will see the exact same electricity bill savings from the installation of your planned solar PV system.

This calculator estimates potential payments from the Smart Export Guarantee (SEF) Scheme, which was introduced on 1 January 2020 and requires energy suppliers to pay customers for the electricity they export to the National Grid. There are a range of tariffs available for this and in some cases participation requires metering. Deals may also be time limited or have other conditions which you should consider carefully in order to make the best choice for you.

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Enter system size, orientation, tilt angle and the cost of your system then click the 'Calculate' button to see the results.


Here are your Solar PV System calculation results:

Please note: these costs are estimated and based on industry averages. They are not an exact indication of how much you’ll be charged by a solar panel installer. Want a better idea of how much you’ll end up paying? Pop your details in this short form, and talk directly to our experienced solar energy team.
The most popular solar panel system size is between 3.6kWp (8 solar panels) and 4kWp (10 solar panels), according to our previous customers. This size of solar panel system generates 3,750kWh of electricity per year, on average for owners.

For comparison, a home using a ‘medium’ amount of electricity gets through 2,900kWh per year on average, according to energy regulator Ofgem. A ‘high’ user gets through 4,300kWh per year.

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2024 Winner Clean Energy Awards

Matt Alexander’s Solar Energy Success Story

A 5-Star Review of NXTGEN Energy’s Products & Services

The work’s been done to an incredibly high standard. The cabling is really neat, the system is performing fantastically well, and we can’t believe how much money we’ve saved already. So, generally a big thank you to Stuart, Kelly and everyone at the NXTGEN team, who have done a really, really good job from start to finish.

We really couldn’t be more pleased.

Matt Alexander

NXTGEN Energy Customer, Essex, UK

Our Accreditations

We are regularly audited to maintain these nationally recognised accreditations, recognising the high quality of our workmanship, and our customer service.

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Bronze Solar Package

8 x PV Panels, 1 x 6.5 KWh Battery, 1 x Inverter.

Our bronze solar package produces 2.6 Kw of Solar PV and provides 6.5 KWh of Battery Storage.

Silver Solar Package

12 x PV Panels, 1 x 6.5 KWh Battery, 1 x Inverter.

Our silver solar package produces 5.32 Kw of Solar PV and provides 6.5 KWh of Battery Storage.

Gold Solar Package

16 x PV Panels, 2 x 6.5 KWh Battery, 1 x Solar Edge Inverter.

Our gold solar package produces 6.08 Kw of Solar PV and provides 13 KWh of Battery Storage.

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Commercial Solar Panel Installations

Commercial solar panels are a smart way to reduce your energy bills, lower your carbon footprint and secure your future energy supply. By installing solar panels on your roof or land, you can generate clean and renewable electricity to power your business operations. You can also benefit from the Smart Export Guarantee (SEG) which pays you for the excess electricity you export to the grid. Commercial solar panels can help you save money, protect the environment and enhance your reputation as a green business.
Residential Solar Panels Installation Photo
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Residential Solar Panel Installations

Residential solar panels are a great way to generate your own clean and renewable electricity at home. By installing solar panels on your roof, you can cut your electricity bills, reduce your carbon footprint and receive payments for the excess energy you export to the national grid through the Smart Export Guarantee (SEG) scheme. Residential solar panels can help you save money, protect the environment and become more energy independent in these times of a cost-of-living-crisis. Now is the time to go solar!