[davedx]

Yup, this is because most things that are engineered have tolerances in them. But pushing the envelope will only get you so far, at some point you're going to run up against hard physical limits (in this case with grid transmission capacity).

The National Grid connection queue is still a huge bottleneck for renewable and battery developers. The amnesty helped but at the end of the day, the overhead lines, substations and transformers need to be upgraded.

At least in the UK there's quite some visibility into the queue and required and ongoing works. Here in Europe it's like a black box.