Solar only
Estimated setup cost£4,350- Year-one benefit
- £618
- Annual electricity use covered
- 35%
- Sustained modelled payback
- 8 years
- 25-year net benefit
- £10,443
Solar & battery cost calculator for Scotland.
Choose your system size to estimate the installed price and potential savings. No contact details needed.
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A few details. A clearer picture.
Solar panels4.5 kWp
1 kWp12 kWp
Battery storage5 kWh
No battery20 kWh
The EV allowance is an add-on to this solar installation, not a standalone charger quote. Only need a home EV charger?
Adjust tariffs & calculation assumptions
These are editable planning assumptions, not a tariff offer or site survey. South-facing output is adjusted to 85% for east/west and 60% for north; some/heavy shade reduces output to 85%/65%. Direct use is capped at 35% of demand and 40% of generation. Battery modelling allows 220 cycles/year and 90% efficiency, capped by remaining demand.
25-year figures assume constant tariffs, 0.5% annual panel degradation and battery replacement in year 10 at 80% of its initial cost. They exclude financing, maintenance and inverter replacement. Optional extras add cost only. Bedroom-based sizes are starting points, not a roof design.
Illustrative SunBru planning model v3 for a straightforward new installation. The solar estimate includes a £450 site allowance plus £900/kWp for the first 3 kWp, £800/kWp for the next 3 kWp and £650/kWp above 6 kWp. Each rate applies only to that portion. A battery fitted with new solar adds £450/kWh. Roof access, scaffolding, slate, split arrays and electrical upgrades can increase the price. The installer confirms equipment, scope and final price after survey.
Payback is the first year after which the model stays above break-even through year 25, including the year-ten battery replacement. It is not a guarantee.
Make sense of your estimate
Answers based on the settings you’ve chosen above.
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The link contains your calculator settings and shortlist, not your contact details or private files. It captures your current settings; copy it again after editing.COMPARE BEFORE YOU CHOOSE
Solar battery costs: compare with solar only
Compare the same home, panels and tariff assumptions. Trying a size here won’t change your plan until you select it.
What the battery changes
- Extra upfront cost
- £2,250
- Change in year-one benefit
- +£116
- Change in 25-year net benefit
- -£1,163
With these settings, the battery option has a lower modelled 25-year net benefit than solar only. More storage does not automatically mean better value.
Your current plan: 5 kWh battery. Selecting an option updates the calculator and your enquiry setup. Use the share or download controls below to keep a copy.
The battery model includes a £1,800 replacement in year ten. Both options include any extras you selected. Benefits combine avoided electricity purchases and export income; these are planning estimates, not quotes or guaranteed savings. Finance, maintenance and inverter replacement are excluded. Actual performance and replacement timing vary.
How much does a solar battery cost in Scotland?
For a battery fitted with new solar, SunBru currently models £450 per kWh, or £2,250 for 5 kWh. This is our planning allowance, not a market average or a battery-only installation quote. Ask for an itemised installed price, including any inverter, electrical work and commissioning.
| Storage | Modelled extra cost | Extra year-one benefit | Compare |
|---|---|---|---|
| 5 kWh | £2,250 | £116 | |
| 10 kWh | £4,500 | £231 | |
| 15 kWh | £6,750 | £265 |
Check Scottish battery funding, VAT relief and unavailable schemes →
General guidance: Energy Saving Trust: battery storage, checked 6 October 2026. SunBru’s prices and calculations are its own illustrative model.
Uses your selected plan, not an unselected comparison. Your enquiry goes to SunBru for review; no installer is contacted automatically.
Take this comparison to an installer
Keep both options, your assumptions and questions in one brief. You can copy or download it without signing in.
Questions based on your settings
- Can you provide itemised quotes for the same 4.5 kWp solar system, both without a battery and with a 5 kWh battery, showing all inclusions and exclusions?
- How does your generation and self-use estimate account for my south roof, little / none shading and 3,500 kWh annual electricity use?
- The SunBru model gives the battery option a lower 25-year net benefit. What assumptions would make the battery worthwhile for my home?
- What are the exact panel, inverter and battery models, the usable battery capacity, and the written warranty limits?
- Does this exact installation supply electricity during a power cut? If so, which circuits and what extra equipment or costs are involved?
- What replacement, maintenance, installation and handover costs are included or excluded? Please confirm payment terms and who handles aftercare.
Includes your current plan and the 5 kWh battery option you’re comparing. It contains calculator settings, not contact details or private documents. Nothing is sent automatically.
LOOKING FURTHER AHEADAfter initial cost and one battery replacement. See assumptions above.
£9,281
Modelled net benefit over 25 years
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A BUDGET STARTING POINT
How much could solar panels cost in Scotland?
In SunBru’s planning model, a 4 kWp system is £3,950 for solar only, or £6,200 with a 5 kWh battery, before optional extras. These examples use the calculator’s existing formula—not a survey of Scottish installer prices, live offers or guaranteed installed prices.
| Panel capacity | Solar only | Solar + 5 kWh battery |
|---|---|---|
| 3 kWp | £3,150 | £5,400 |
| 4 kWp | £3,950 | £6,200 |
| 6 kWp | £5,550 | £7,800 |
Trying an example changes only your panel and battery sizes. Your roof, electricity-use, tariff and extras settings stay as entered, so your resulting total may include those extras. These examples are not a battery-only retrofit price.
What is behind these guide prices?
Illustrative SunBru planning model v3 for a straightforward new installation. The solar estimate includes a £450 site allowance plus £900/kWp for the first 3 kWp, £800/kWp for the next 3 kWp and £650/kWp above 6 kWp. Each rate applies only to that portion. A battery fitted with new solar adds £450/kWh. Roof access, scaffolding, slate, split arrays and electrical upgrades can increase the price. The installer confirms equipment, scope and final price after survey.
Roof access, scaffolding requirements, electrical upgrades, exact equipment, warranties and tax treatment need checking in the installer’s written scope. Final scope and total price are confirmed before booking.
Further guidance: Energy Saving Trust: solar panels · battery storage. Sources reviewed 6 October 2026. SunBru’s price examples use its own model, not Energy Saving Trust prices.
Ready to compare written prices? Shortlist Scottish solar installers and ask each to price the same system and installation scope.
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