For a couple of hours last week I was paid to use electricity. Price of eletricity goes negative fairly often, but only a little. On top of the electricity I, having a spot priced contract, pay a margin ~0.5 € cents/kWh and tax and transmission fee. Last two are about 3 cents /kWh. So for me to get paid the price has to be about -7¢/kWh and that has only ever happened during a few hours.
En kokonaan sulkisi pois mahdollisuutta että joku on keksinyt etsiä jotain elektroniikkaa noista.
Mutta ehkä niistä voi koittaa ujuttaa joku haittakoodi vesilaitoksen sisäverkkoon odottamaan muita operaatioita. Kävisin aika tarkalla kammalla systeemit läpi