Your Home
Midlands average: ~900 kWh/kWp/yr
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Your best-case annual saving
£0
Solar + battery + smart tariff over 25 years
These are estimates based on UK average data and your inputs. Actual savings will vary by property, usage habits, equipment, and tariff. Always get professional quotes before investing.
Cumulative savings over 25 years
Assumes electricity prices keep rising at 4% a year
Monthly generation profile
Estimated solar output across the year for your system size
What makes up your savings
| Component | Solar only | + Battery | + Smart tariff |
|---|---|---|---|
| Grid electricity avoided | — | — | — |
| SEG export income | — | — | — |
| Off-peak battery arbitrage | — | — | — |
| EV charging saving | — | — | — |
| Total annual saving | — | — | — |
Energy self-sufficiency
How much of your annual electricity comes from your own roof
How we calculated this
These are estimates based on your inputs and UK average data. Individual results will vary.
- Solar generation: — kWh/yr · based on — kWp at 900 kWh/kWp (UK average)
- Self-consumption rate: —% of generation used on-site (reflects your daytime home usage)
- Export rate: —p/kWh · remaining generation exported under SEG
- Battery adds: shifts an additional ~30–40% of generation from export to self-use
- Smart tariff bonus: ~£150–300/yr from overnight grid arbitrage (charging battery at ~7–10p, using at 24p+)
- Price rise assumption: —% per year (compounds annually over 25 years)
- Panel degradation: 0.5% per year efficiency loss built in
- This calculator does not show installation costs. Speak to an installer for a full quote.
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