Calculate your savings

Check solar panel & battery cost in 60 seconds

Find out how many panels you need, whether a battery is worth it, and how much you could save on energy bills instantly.

Get my free estimate See how it works

In 60 seconds, you’ll see

Your estimated yearly saving
What that adds up to over 25 years
The solar system size to aim for
A free assessment to confirm your exact numbers

Show me my numbers

Where to start

Thinking about installing solar panels but don’t know where to start?

Solar is one of the smartest long-term investments UK homeowners can make, but knowing where to start with the process can feel overwhelming. Our UK solar calculator takes the uncertainty out of going solar. Whether you’re just starting to explore solar panels or you’re comparing quotes and want extra clarity, this tool helps you understand your options with confidence.

Manan & Matthew

Your solar experts

Prefer to talk it through?

Not sure where to start? Book a free, no pressure call and one of our experts will walk you through your options.

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60-second estimate

Calculate what solar could save you

Choose residential or commercial, tell us a few details, and we will show a realistic estimate of your savings and the system to aim for. A free assessment then nails the exact number.

Your typical monthly electricity bill

£180/month

£60£600+

Illustrative only. Your free assessment confirms the exact figures for your home.

Your estimate

£1,340 saved / year

Over 25 years

£33,500

Suggested system

4-5 kW + battery

Get my exact number →

Illustrative only. A free Solar4Good assessment nails the exact number for your roof, usage and tariff.

How it works

How our solar cost calculator works

Drag your monthly bill

Tell us what you typically spend on electricity each month.

See your estimate instantly

Your yearly saving, 25 year total and the system size to aim for.

Book a free assessment

A Solar4Good expert reviews your roof, usage and tariff, with no pressure.

Get your exact numbers

We confirm the precise savings, system and cost for your home.

Why use it

The benefits of using our solar and battery calculator

If you’re still wondering why you should use our solar installation cost calculator, look no further than these simple facts we’ve gathered:

Clear cost breakdowns

No inflated promises, just honest numbers.

UK-specific data

Tailors the system size to your household.

Battery insights

Check if storage is worth adding now or later.

Confidence to plan

Compare quotes and budget accurately.

The payoff

Why get solar panels?

Find out how much solar would cost you in the UK, then see what it gives back.

Generate clean, renewable electricity

Reduce your energy bills by up to 70%

Get paid for unused electricity

*Dependent on the customer’s consumption, generation and electricity cost at the time of install.

Questions, answered

How our free solar savings estimate works.

How does this solar calculator work out my savings?

It takes your typical monthly electricity bill and applies a realistic UK estimate to show your likely yearly saving, what that adds up to over 25 years, and the system size to aim for.

How accurate is the estimate?

It is an illustrative guide based on typical UK figures, so treat it as a starting point. Your exact saving depends on your roof, energy use and tariff, which we confirm in a free assessment.

Is the figure a guaranteed saving or price?

No. It is designed to give you a realistic idea of what solar could do for you. The precise numbers come from a free, no obligation assessment of your home.

Do I need my postcode or usage details to use it?

No. Just drag your monthly electricity bill for an instant estimate. We gather the finer details, like your roof and tariff, during your free assessment.

What size system will I need?

The calculator suggests a typical system for your bill, for example 4 to 5 kW plus a battery. The exact size for your home is confirmed when our team assesses your roof and energy use.

Does adding a battery change my savings?

A battery lets you store and use more of your own solar power, which often increases your savings. Your free assessment shows the difference a battery would make for your home.