Energy was last better‑than‑free: yesterday Next

On the Agile Octopus tariff, customers get paid to use electricity when there’s too much in the grid.

That’s cheaper than Octopus Energy paying to store it.

The price changes every half-hour.

How free electricity works

Period

Region

Monday 28 Sep 2026 · half-hourly prices

Southern Wales

Price for each half-hour
Negative price (you’re paid to use power)

Stats for Monday 28 Sep 2026

26.7p

Cheapest half-hour 12.30pm – 1pm

72.8p

Dearest half-hour 6.30pm – 7pm

0 hours

Negative prices none on 28 Sep 2026

27.5p avg

Cheapest 3 hours 11am – 2pm

38.7p

Average price on 28 Sep 2026

Show as a table

Time	Price
12am – 12.30am	29.8p
12.30am – 1am	29.4p
1am – 1.30am	28.4p
1.30am – 2am	28.9p
2am – 2.30am	27.9p
2.30am – 3am	27.2p
3am – 3.30am	28.4p
3.30am – 4am	28.1p
4am – 4.30am	30.3p
4.30am – 5am	30.5p
5am – 5.30am	35.6p
5.30am – 6am	35.6p
6am – 6.30am	39.8p
6.30am – 7am	42.5p
7am – 7.30am	43.2p
7.30am – 8am	46.1p
8am – 8.30am	43.2p
8.30am – 9am	41.5p
9am – 9.30am	39.7p
9.30am – 10am	36.5p
10am – 10.30am	33.9p
10.30am – 11am	31.5p
11am – 11.30am	28.4p
11.30am – 12pm	27.4p
12pm – 12.30pm	27.1p
12.30pm – 1pm	26.7p
1pm – 1.30pm	27.9p
1.30pm – 2pm	27.4p
2pm – 2.30pm	29.5p
2.30pm – 3pm	30.1p
3pm – 3.30pm	36.2p
3.30pm – 4pm	38.3p
4pm – 4.30pm	55.3p
4.30pm – 5pm	61.3p
5pm – 5.30pm	66.4p
5.30pm – 6pm	69.6p
6pm – 6.30pm	72.6p
6.30pm – 7pm	72.8p
7pm – 7.30pm	54.1p
7.30pm – 8pm	51.5p
8pm – 8.30pm	44.3p
8.30pm – 9pm	39.8p
9pm – 9.30pm	38.7p
9.30pm – 10pm	34.4p
10pm – 10.30pm	33.8p
10.30pm – 11pm	35.3p
11pm – 11.30pm	34.8p
11.30pm – 12am	33.9p