Comment by teamonkey

It’s not the same thing. Customers on some of Octopus’ tariffs get occasional zero or negative pricing to spur demand that can help balance the grid or reduce curtailment.

This trial is different. I think the real goal is to incentivise local communities to support the construction of wind farms. If you have a wind farm nearby, surplus generation is used to supply you with free power when otherwise the turbines would have been curtailed.