1. What is the Energy Saving Trust Solar Panel Calculator?

Definition: This calculator estimates the financial savings from solar panels based on energy generation, electricity tariffs, and system costs.

Purpose: It helps homeowners and businesses evaluate the financial benefits of installing solar panels.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• Savings — Net financial benefit (currency)
• Generated kWh — Total energy produced by solar panels (kWh)
• Tariff — Current electricity price (currency per kWh)
• Cost — Total system installation cost (currency)

Explanation: The formula calculates the value of generated electricity minus the initial investment cost.

3. Importance of Solar Savings Calculation

Details: Accurate savings estimation helps determine payback period and return on investment for solar panel installations.

4. Using the Calculator

Tips: Enter the total generated kWh, current electricity tariff (default £0.30/kWh), and total system cost. All values must be ≥ 0.

5. Frequently Asked Questions (FAQ)

Q1: How do I estimate generated kWh?
A: Use Energy Saving Trust's solar calculator or consult installer estimates (typically 850-1,100 kWh/kWp/year in the UK).

Q2: Should I include maintenance costs?
A: Solar panels require minimal maintenance. If including, add to system cost (typically 1-2% of system cost annually).

Q3: What tariff should I use?
A: Use your current electricity rate or the Smart Export Guarantee (SEG) rate if exporting surplus energy.

Q4: How accurate is this calculation?
A: It provides a basic estimate. For precise figures, consult a professional solar installer.

Q5: Does this account for inflation?
A: No. Electricity prices typically rise over time, so actual savings may be higher than calculated.