Your Location

Where will the panels be installed?

Step 1: Choose your region or enter exact coordinates for a more accurate generation estimate. Solar output varies across the UK — southern areas get ~20% more sun than Scotland.
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Equipment

Configure your solar arrays & battery storage

Step 2: Add your solar arrays. Different roof faces (e.g., East + West split) should be added as separate arrays for accurate calculation.

Battery Storage

System & Costs

Upfront installation & hardware costs

Step 3: Enter your installation quotes. If you don't have a quote yet, use our high-quality baseline estimates to model the project.

Installation Costs & Specs

Energy Profile

Your consumption patterns

Step 4: Define your electricity usage. Use our smart estimator to determine how much solar energy you'll actually use versus exporting to the grid.

Tariffs & Rates

Import/Export prices

Step 5: Set your energy prices. Choosing the right export tariff (like Octopus Flux) can significantly shorten your payback period.

System & Financials

Losses, Loan & Inflation

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Financial Results

Your solar & battery financials

Step 7: View your projected savings, ROI, and environmental impact. Explore the breakdown charts to see how your investment performs over its 25-year lifespan.
-- Payback Period
-- Total Profit (25yr)
-- ROI
-- Annual Savings
-- Annual Export Income
-- Cost per kWh
-- CO₂ Saved (Lifetime)
-- Battery Daily Coverage
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Climate Impact

Your system is estimated to save 0 tonnes of CO₂ over its 25-year lifespan. This clean energy generation helps reduce reliance on fossil fuels, a critical step towards meeting the UK's Net Zero 2050 targets.

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Equivalent to planting
0 trees
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Offsets
0 long-haul flights
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Replaces
0 petrol miles

Annual Savings Breakdown

Detailed view of savings vs export income per year

Cumulative Cash Flow

Monthly Generation

Energy Balance

How your power is distributed annually

Investment Comparison

How does this compare to putting £0 in a savings account?

Scenarios

Solar PV Calculator UK: Savings, ROI, and Battery Payback

This UK solar panel calculator helps homeowners estimate installation costs, annual savings, and long-term return on investment. You can model a full solar + battery setup, battery-only upgrade, or an expansion of an existing system to compare realistic outcomes before requesting installer quotes.

If you are searching for a solar payback calculator, battery storage payback calculator, or solar ROI calculator for UK homes, this tool is designed to give practical answers quickly using editable energy and tariff assumptions.

For installers and website owners

Looking for a solar calculator widget for website lead generation? Visit our embed solar calculator page to see how this can support installer websites, renewable content hubs, and conversion-focused landing pages.

We also have a dedicated solar calculator for installers page focused on lead qualification and website conversion use cases.

Frequently Asked Questions

How accurate is this solar and battery calculator for UK properties?

It provides a strong planning estimate based on your location, usage, system size, and tariff assumptions. Final project economics should always be validated with an installer survey and formal quote.

Can I use this as a battery-only payback calculator?

Yes. Choose Battery Addition mode to model adding storage to an existing solar setup and compare annual savings and payback.

Does this help compare multiple system scenarios?

Yes. Use scenarios and export tools to compare different array sizes, battery capacities, and financial assumptions.

Is this useful for solar installers and lead generation websites?

Yes. Installer websites can use this style of tool to pre-qualify visitors and attract users searching for an interactive solar savings calculator.