.svg)
Calculate Your Solar Business Case
Commercial Solar ROI Calculator Scotland
Stop guessing and start modelling. Estimate your payback period, annual cash savings, and carbon reduction in under 30 seconds. This tool is calibrated specifically for Scottish businesses, using current 2026 grid electricity rates and Business Energy Scotland funding criteria to provide a realistic financial forecast.
Based on average commercial tariff rates of 25p/kWh. Figures are indicative estimates only.
Configure Your Project Inputs
To get an accurate forecast, input your current energy spend and available roof space. The calculator will automatically size a commercial solar PV system to match your consumption profile, ensuring you don't pay for capacity you don't need.
Annual Electricity Bill
Enter your total spend (£) excluding VAT and Climate Change Levy (CCL).
We use this to calculate your potential savings based on offsetting grid imports.
Available Roof Space
Dropdown Options:
Don't worry about exact measurements. Pick the category that best describes your facility.
Current Tariff Rate
Check your latest utility bill. Most commercial contracts in Scotland are currently between 22p and 30p per kWh.
Electricity used
percentage of electricity used during the daytime
Current Tariff Rate
Check your latest utility bill. Most commercial contracts in Scotland are currently between 22p and 30p per kWh.
Show Advanced Settings
NO
YES
Your Financial Forecast
Based on your inputs, here is the projected performance of a Greentech solar system over a 25-year lifespan. These figures account for panel degradation and conservative energy price inflation.
£12,450 / year
Projected Annual Savings
This is the cash you keep in the business instead of paying to your energy supplier. This figure is index-linked; as grid prices rise, your savings increase.
3.8 Years
Estimated Payback Period
This is the time taken for the system to pay for itself through energy savings alone.
With SME Loan: Immediate Cash Positive (See below).
£240,000+
20-Year Net Profit
Solar panels are warranted for 25 years. After the payback period, every unit of electricity generated is effectively free, contributing directly to your bottom line.
14 Tonnes CO2e
14 Tonnes CO2e
14 Tonnes CO2e
Carbon Reduction
Equivalent to planting 700 trees annually. This data can be used directly in your SECR (Streamlined Energy and Carbon Reporting) audits.
The Cost of Inaction
Doing nothing is not free. It is an active decision to continue paying rising grid prices. This graph visualizes the cumulative cost of your current energy contract versus the stability of a commercial solar investment.
Model with Government Funding
Capital Expenditure (CapEx) should not be a barrier. Toggle the Business Energy Scotland Loan to see how government funding transforms the business case.
Download Your Detailed Business Case
The online calculator provides a snapshot. Download the full Solar Feasibility Report (PDF) to see the granular detail your Finance Director needs, including:
Tax Allowances:
Annual Investment Allowance (AIA) & Super Deduction impact.
Yield Simulation:
Month-by-month generation forecasts (PVGIS data).
Asset Valuation:
How the system increases your property value.
ROI Calculator FAQs
What happens if I export energy to the grid?
How do you calculate the "Payback Period"?
Does this calculation include the £20k cashback grant?
How accurate is this calculator?
Validate these numbers!
This calculator assumes a standard roof profile. A physical site survey allows our engineers to assess shading, cable runs, and structural capacity to give you a fixed-price proposal.
