Solar Savings Calculator
Get a personalised estimate for your home in 2 minutes. No contact details needed — just enter a few details below.
Calculations use real Milton Keynes solar yield data (950 kWh/kWp/year) and the Ofgem April 2026 price cap (24.67p/kWh).
How the Calculator Works
Transparent methodology — no black box estimates.
Real MK Solar Yield Data
Uses 950 kWh/kWp/year — the actual annual yield for Milton Keynes and surrounding areas, not a national average. South-facing is the 100% baseline; east/west drops to 85%; north drops to 65%.
Current Energy Prices
Savings calculated at 24.67p/kWh (Ofgem April 2026 price cap), SEG export rate 12.5p/kWh. Grid electricity saved is worth roughly 2× more than electricity exported.
Realistic Self-Consumption
Without battery: 30% self-consumption assumed (industry standard for average household). With battery: 70% self-consumption. The difference explains most of the battery saving.
Calculator Assumptions
All inputs are visible and adjustable. Your precise quote will use actual measurements from your property.
| Variable | Value Used | Source |
|---|---|---|
| Solar yield (MK) | 950 kWh/kWp/year | PVGIS / SAP calculations for MK1 postcode area |
| Grid electricity rate | 24.67p/kWh (Ofgem April 2026 cap) | Ofgem price cap, April 2026 |
| Smart Export Guarantee rate | 12.5p/kWh | Average SEG rate across major suppliers, March 2026 |
| Self-consumption (no battery) | 30% | Industry standard for a working household |
| Self-consumption (with battery) | 70% | Typical result with 9.5kWh battery + average evening use |
| CO₂ factor | 0.233 kg/kWh | DESNZ UK grid carbon intensity, 2025 |
| EV additional saving | ~£200/yr | Based on 3,000 miles/year charged from solar at 4 miles/kWh |
Ready to Get an Accurate Quote?
The calculator gives you a strong indication. A free home survey takes it further — precise roof measurements, shading assessment, and a fixed price in writing.
No obligation • Fixed pricing • MCS & NAPIT certified • Based in Milton Keynes