Solar panels are a highly effective way for homeowners to reduce electricity bills, cut carbon emissions and increase household energy independence. Whether you’re considering solar for the first time or comparing options, our solar panel calculator provides instant, tailored estimates for your home.
Using data based on current solar system costs, energy yields, and government incentives, you can estimate installation costs, yearly savings, and payback period in minutes.
Get an Instant Solar Cost and Savings Estimate
Our online calculator provides a quick estimate of solar installation cost, annual electricity bill savings, and expected payback period, without phone calls or site visits.
How the Solar Calculator Works
To generate your estimate, simply:
- Select your house size
- Choose whether to include a battery (5.2kWh)
- View estimated system cost, yearly savings, and payback time
Cost & savings
Costs and savings depend on house size, system size, solar generation, optional battery storage, and typical energy usage. This estimate shows how we calculate expected costs and savings.
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This solar system could cost:
£7,016 -
Estimated yearly electricity bill savings:
£630 -
Estimated payback period:
11 years
With finance
Spread the cost of your solar system with finance from our approved lending partners. All finance is subject to eligibility, approval, and applicable terms and conditions.
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Over 5 years
£138 per month
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Over 10 years
£86 per month
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Over 20 years
£62 per month
Example finance illustration: Total order value: £10000. Loan duration: 10 years. Upfront deposit: £500. Total amount of credit: £9500. Representative APR: 9.9%. Rate of interest: 9.5% (fixed). Total cost of credit: £5262.4. Total amount payable: £15262.4. Monthly payment: £123.02.
Battery Storage Option
You can choose whether to include a battery (e.g. 5.2kWh). Adding battery storage lets you use more of your own solar generation rather than exporting it to the grid, which increases self-consumption and long-term savings.
Solar panels are designed to operate for 25 years or more, meaning many households benefit from significant savings after the system has paid for itself.
Solar Panel Cost Calculator
Get accurate solar pricing in three simple steps. Answer a few questions about your home, choose from our recommended products, and get personalised quote.
Tell Us About Your Home
Complete a few simple questions using our online quote form to view your personalised PV and battery options.
Choose Your System
Select from our recommended solar panels, batteries, and inverters tailored specifically to your home and energy needs.
Get Your cost
Love your cost estimate? Schedule a free site visit where our certified installers refine your design and answer all your questions.
Join 1000+ happy customers
About the calculator
When configuring your system, you can choose between different panel models and outputs. Higher-wattage panels generate more electricity per panel, which can reduce the total number required.
Selecting panel options
Aiko Neostar 470W All-Black (Bi-Facial, Dual Glass)
- 470W output per panel
- All-black finish
- Dual-glass construction
- Advanced cell technology
- Typical configuration: 6 panels (2.82kWp system)
This option is suitable for homes with limited roof space or where a premium, high-efficiency panel is preferred.
DMEGC 455W All-Black (Bi-Facial)
- 455W output per panel
- All-black design
- Bi-facial technology
- Durable, long-term performance
- Typical configuration: 6 panels (2.73kWp system)
This option provides strong performance with a slightly lower output per panel, still well suited to most UK homes.
How Many Solar Panels Do I Need?
The number of solar panels required depends on your household electricity usage, available roof space, and the wattage of the panels selected. Our calculator and configuration tool use high-output modern panels, meaning fewer panels are needed to generate meaningful savings.
Most UK homes typically install between 6 and 12 solar panels, which suits the majority of domestic roof sizes and energy needs.
What Does 6, 8, 10 or 12 Panels Mean in Practice?
As a general UK guide:
- 6 panels (around 2.7–2.8kWp)
Suitable for smaller households or homes with lower electricity usage. - 8–10 panels (around 3.6–4.7kWp)
Common for average 3-bed homes with moderate daytime usage. - 12 panels (around 5.4–5.6kWp)
Better suited to larger households, higher electricity consumption, or homes planning to add battery storage or an EV charger.
Our calculator limits standard selections to up to 12 panels, as this covers the needs of most domestic properties.
Inverter and Battery Options
Once panel quantity is selected, you can choose between:
- Inverter only (no battery storage)
Best for households that use most of their electricity during the day. - Inverter with battery storage
Allows excess solar energy to be stored and used later, increasing self-consumption and reducing reliance on the grid.
Battery storage does not change how many panels you need, but it can significantly improve how much of your generated electricity you actually use.
Need More Than 12 Panels?
If your property requires more than 12 panels, this usually indicates:
- Very high electricity usage
- Large roof areas
- Future plans such as EV charging, heat pumps, or full electrification
In these cases, a fully customised quote is required to ensure correct system design, inverter sizing, and compliance with UK grid connection rules.
👉 If you need more than 12 panels, click here to contact us for a fully customised quote.