[greglindahl]

It's all up to the charging algorithm. If your grid access is priced according to energy transferred, you pay a positive retail price no matter how negative the wholesale price is. If your grid access is a fixed charge, you could directly take advantage of the negative wholesale price.

In some places, industrial users have the second algorithm.

[Scoundreller]

Reality is that grid access (transport/distro) should be more variable too.

Line sag is worst when demand is highest or it’s hot outside. Same with running out of transformer capacity.

When an upgrade is triggered, it’s to build more peak capacity.