Just a few months ago we were struggling with historically high energy prices. At it's peak the fixed long term contracts were going at the rates above 50 cents per kWh. Even our average price on spot pricing when we were able to optimize the biggest power usages was over 10 cents.
Now, the situation is completely different. Last night the spot price dropped below zero and this night won't be different. Even accounting for the comission our electricity company adds on top of the spot pricing it the price will still be negative during the off-peak hours.
Of course the electricity won't be completely free, or we won't be earning money no matter how much electricity we would consume. On top of the price of the electricity itself there comes taxes and the transmission fees. While those felt like a fraction of the total cost of electricity during the winter now they are making up the majority of the cost.