Solar self-consumption
Value of higher self-consumption with 5,000 kWh solar generation
Moving from 40% to 65% self-consumption means using an extra 1,250 kWh of solar at home rather than exporting it.
Illustrative 28p import / 15p export£162 extra annual value
1,250 kWh extra self-used · 13p/kWh value gap
Import/export sensitivity
| Scenario | Import | Export | Value gap | Extra annual value |
|---|---|---|---|---|
| Narrow gap | 22p | 15p | 7p | £88/yr |
| Base | 28p | 15p | 13p | £162/yr |
| Wide gap | 32p | 10p | 22p | £275/yr |
Higher self-consumption does not by itself justify buying a battery. Compare the additional value with equipment cost, losses, degradation and lost export income.