ECO wins by 62p over DEFAULT, the next cheapest: it saves 33p of electricity, because it draws less power (0.48 kWh against 1.54) in a cheaper window (28.2p a kWh against 30.5p), and 28p of water. Every setting at its own cheapest window, under the prices still to come:
The cheapest window for ECO starts Sun 22:30 and runs 8 half hours, as long as it ran when measured, where the Agile price, weighted by when it draws the power, averages 28.2p a kWh.
Half hour by half hour: Octopus's price, the power drawn in each five minutes of the logged run, and what each half hour costs:
| drawn | a kWh | costs | |
| 22:30 | 285 Wh | × 25.61p | 7.30p |
| 23:00 | 24 Wh | × 33.25p | 0.80p |
| 23:30 | 23 Wh | × 32.06p | 0.74p |
| 0:00 | 30 Wh | × 31.28p | 0.94p |
| 0:30 | 20 Wh | × 31.86p | 0.64p |
| 1:00 | 29 Wh | × 32.06p | 0.93p |
| 1:30 | 19 Wh | × 31.44p | 0.60p |
| 2:00 | 54 Wh | × 31.66p | 1.71p |
| electricity | 484 Wh | 28.2p | 13.65p |
| electricity | 0.48 kWh × 28.2p a kWh | 14p |
|---|---|---|
| water | 24.8 litres × 0.42p a litre | 10p |
| powder | 100 ml, 83 g × £1.95 a kg | 16p |
| total | shown as 40p | 40p |
On Flexible Octopus, at 26.60p a kWh, the same wash costs 39p, so on Agile it costs 1p more.
The kWh, and when in the run it draws them, are from one logged run on the plug, the litres from the water meter; water is £4.2067 a cubic metre with sewerage.
| wait | 1.5h | until the window opens |
|---|---|---|
| run | 5.0h | the machine says 4:59, rounded up to the half hour the timer steps in |
| set | 6.5h | on the machine's “finish in” timer |