Energy Tariff Comparison Report

2024-08-01 to 2025-07-31

Benchmark cost against the Ofgem Energy Price Cap

£48,685
Average £1,475 per home
Fixed costs:
ⓘ
Annual fixed costs for connection and capacity. Includes standing charges and capacity charges.
£6,418
Import cost:
ⓘ
Cost of all electricity use, at the grid import rate, before solar savings. 26.3p per kWh, 204,339 kWh
£53,762
Solar export value:
ⓘ
Revenue from all solar generation, at the Feed-in-tariff export rate, before behind-the-meter savings. 7.4p per kWh, 84,272 kWh
£6,228
Solar BtM uplift:
ⓘ
Additional value from matched behind-the-meter solar, at the difference between the import and export rates. 18.9p per kWh, 27,836 kWh
£5,267
Total cost (incl. fixed):
ⓘ
Total cost including fixed charges, import costs, less solar exports and other credits.
£48,685
Fixed: £189/home/year • Imports: 204,339 kWh at 26.3p/kWh • Solar: 84,272 kWh at 7.4p/kWh • BtM Uplift: 27,836 kWh at 18.9p/kWh

Water Lilies Customer Tariff (what customers pay)

£37,774
Average £1,145 per home
Saved £2,169.9 versus Octopus
Fixed costs:
ⓘ
Annual fixed costs for connection and capacity. Includes standing charges and capacity charges.
£5,134
Import cost:
ⓘ
Cost of all electricity use, at the discounted microgrid rate, before solar savings. 21.0p per kWh (20% discount), 204,339 kWh
£43,009
20% discount
Solar microgrid credit:
ⓘ
Revenue from providing your solar installation to the microgrid, at the microgrid solar usage rate. £85/kWp/year
£10,370
Total cost (incl. fixed):
ⓘ
Total cost including fixed charges, import costs, less solar exports and other credits.
£37,774
Fixed: £151/home/year • Imports: 204,339 kWh at 21.0p/kWh • Microgrid credit: £85/kWp/year

Octopus Cosy Tariff

£39,944
Average £1,210 per home
Fixed costs:
ⓘ
Annual fixed costs for connection and capacity. Includes standing charges and capacity charges.
£6,418
Import cost:
ⓘ
Cost of all electricity use, at the grid import rate, before solar savings. 23.9p per kWh, 204,339 kWh
£48,888
Solar export value:
ⓘ
Revenue from all solar generation, at the Octopus Outgoing rate, before behind-the-meter savings. 15.0p per kWh, 84,272 kWh
£12,641
Solar BtM uplift:
ⓘ
Additional value from matched behind-the-meter solar, at the difference between the import and export rates. 8.9p per kWh, 27,836 kWh
£2,721
Total cost (incl. fixed):
ⓘ
Total cost including fixed charges, import costs, less solar exports and other credits.
£39,944
Fixed: £189/home/year • Imports: 204,339 kWh at 23.9p/kWh • Solar: 84,272 kWh at 15.0p/kWh • BtM Uplift: 27,836 kWh at 8.9p/kWh

Water Lilies Market Tariff (what CESCo pays)

£37,587
Average £1,139 per home
Saved £2,357 versus Octopus
Fixed costs:
ⓘ
Annual fixed costs for connection and capacity. Includes standing charges and capacity charges.
£8,110
Import cost:
ⓘ
Cost of all electricity use, at the grid import rate, before solar savings. 19.6p per kWh, 204,339 kWh
£40,059
Solar export value:
ⓘ
Revenue from all solar generation, at the grid export rate, before behind-the-meter savings. 7.8p per kWh, 84,272 kWh
£6,590
Solar BtM uplift:
ⓘ
Additional value from matched behind-the-meter solar, at the difference between the import and export rates. 8.6p per kWh, 46,394 kWh
£3,993
Total cost (incl. fixed):
ⓘ
Total cost including fixed charges, import costs, less solar exports and other credits.
£37,587
Fixed: £239/home/year • Imports: 204,339 kWh at 19.6p/kWh • Solar: 84,272 kWh at 7.8p/kWh • BtM Uplift: 46,394 kWh at 8.6p/kWh