Solar PV & Battery Savings Calculator
Calculate your potential savings with Smart Export Guarantee (SEG) tariff comparison
Your Details
kWh per year (typical: 2,700-3,600)
Higher rates often require being their customer
💷 Cost & Savings Breakdown
Installation Cost
£7,000
0% VAT until March 2027
Total Annual Savings
£679
Bill savings + SEG income
Payback Period
10.3 years
Time to break even
25-Year Savings
£16,965
Lifetime value
Annual Savings Breakdown
Bill Savings (self-consumption)£328
SEG Export Income£351
Total Annual Benefit£679
📊 SEG Tariff Comparison
Your annual export income varies dramatically based on your chosen SEG tariff. Choosing the right tariff can add hundreds of pounds to your annual savings.
Octopus Intelligent Flux
0.2513p/kWh • Octopus customer + compatible battery
£588
per year
Good Energy Solar Exclusive
0.25p/kWh • Solar installed by Good Energy
£585
per year
EDF Export Exclusive
0.24p/kWh • EDF customer + specific installer
£562
per year
E.ON Next Export Premium
0.21p/kWh • E.ON customer
£491
per year
OVO SEG Install Exclusive
0.2p/kWh • OVO customer + battery
£468
per year
British Gas Export & Earn Plus
0.151p/kWh • British Gas customer
£353
per year
Octopus Outgoing Fixed
0.15p/kWh • Octopus customer
£351
per year
ScottishPower SmartGen
0.06p/kWh • No specific requirements
£140
per year
E.ON Next Export
0.03p/kWh • Available to non-customers
£70
per year
💡 Pro Tip
The best SEG rates (20-25p/kWh) often require you to be an electricity customer of that supplier. Consider switching suppliers to maximize your export income. The difference between the best and worst rates can be over £518/year!
🔋 Solar vs Solar + Battery
Solar Only
Installation Cost£7,000
Self-Consumption35%
Annual Savings£679
Payback Period10.3 years
Solar + Battery ⭐
Installation Cost£7,000
Self-Consumption70%+
Annual Savings£679
Payback Period10.3 years
✅ Higher initial cost but faster payback due to increased self-consumption