At Octopus Energy, I think we’ve made negative prices available to retail customers (at least in the UK, not sure about the other countries we’re retailing in).
People getting paid to charge their cars because the grid has a surplus of (probably green) energy.
I just want to compliment Octopus Energy, I just tried popping over for a quote, and the website just says "No. You don't want to switch right now". Not sure if this is common with other energy suppliers, but it looks good (I'll remember for when/if I do end up switching next).
This is mandated by OFGEM in the UK now. uSwitch will also give you the current "best deal".
I have done some work with the Octopus systems and they are very new an agile, but don't handle the complexity that the big 6 have put in place over several decades. The overall metering and settlements business in the UK is quite complex especially including legacy gas and elec accounts and meters.
People getting paid to charge their cars because the grid has a surplus of (probably green) energy.