This cost and generation calculator estimates how much electricity a solar panel system could generate on a Scottish home and what a system of that size typically costs to install. It does not predict savings or payback — a no-obligation survey gives figures for your home. We install through MCS-certified partners across all Scottish postcodes.
Quick Answer
A typical Scottish solar panel system generates roughly 880-950 kWh per kWp each year, depending on location and roof orientation. Use the calculator below to estimate generation and typical system cost for your home. Savings depend on your roof, usage and tariff — a no-obligation survey gives figures for your home.
Estimate Your Solar Generation and System Cost
Enter your details below to estimate annual generation and the typical installed cost of a system for your home. Calculations use Scottish irradiance data and typical installation price ranges.
Configure Your System
Adjust parameters below
Battery Storage
Adds approx. £3,500 to total cost
Your Solar Generation Estimate
Annual Generation
4,230 kWh
Used in Your Home
2,115 kWh
Exported to Grid
2,115 kWh
Share of Your Usage
60%
Estimated System Cost
£7,966
Savings depend on your roof, usage and tariff — a no-obligation survey gives figures for your home.
How does this solar calculator work?
Enter your system size and location — the calculator estimates annual generation and a typical installed cost for a system of that size.
The calculator uses a transparent methodology based on Scottish data. Here is exactly what it does with your inputs.
Calculates annual generation
Your system size (kWp) is multiplied by Scottish irradiance data for your region (880-950 kWh/kWp/year depending on location). This gives your estimated annual electricity generation in kWh.
Estimates typical system cost
The calculator applies typical Scottish installation price ranges for the system size you choose, with an optional battery. Your actual quote will depend on your roof, access and equipment choice.
Shows the assumptions used
Irradiance, panel degradation and price ranges are listed below so you can see how the estimate is built.
What assumptions does the solar calculator use?
It uses Scottish irradiance data, 0.5% annual panel degradation and typical installation price ranges — actual generation and cost will vary with your roof and equipment.
Every calculator makes assumptions. Here are ours, clearly stated so you can adjust your expectations accordingly.
| Assumption | Value Used | Source / Rationale |
|---|---|---|
| Scottish irradiance | 880-950 kWh/kWp/yr | PVGIS data for Scottish regions. Highlands 880, Central Belt 940, East Coast 950. |
| Panel degradation | 0.5% per year | Industry standard. Premium panels degrade at 0.25-0.4%. Budget panels at 0.5-0.7%. |
| System lifespan | 25 years | Matches panel warranty period. Many systems operate 30+ years. |
These figures are estimates only. Savings depend on your roof, usage and tariff — a no-obligation survey gives figures for your home.
Ready to Turn These Numbers Into Reality?
The calculator gives you an estimate. A no-obligation survey confirms the exact system and price for your property. We install through MCS-certified partners.
Frequently Asked Questions — Solar Calculator Scotland
Yes. We install through MCS-certified partners that cover all Scottish postcodes, from Glasgow and Edinburgh to the Highlands and Islands.
Yes, a battery can be retrofitted to most existing solar panel systems. A surveyor will check compatibility with your current inverter and roof setup.
Interest-free credit up to £30,000, subject to status.
Call us on 0141 230 0198 or fill in the form on our get a quote page. We arrange a no-obligation survey, then send you a written no-obligation quote.
Solar Installation Through MCS-Certified Partners
Scottish Energy Efficiency
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Data sources: MCS MIS 3002 irradiance data, manufacturer specifications. Updated October 2026.
Your Solar Investment Starts Here
Get a no-obligation survey and quote for your home. We install through MCS-certified partners, and 0% VAT applies to solar panels and batteries until 31 March 2027.
Compare Quotes NowLast updated: October 2026