seemingly does not function with anything that lets you settle impassable mountains. I use biomes! caverns, put main settlement there and the wind farm a few tiles off, add pylons until it reaches main base, place connector and connect, it states its producing 18k energy on world map, the power point in the settlement produces 0 when it states its connected.

attempted to make the mod function in my pack where both settlements were on flat ground and it functioned just fine with new settlement and power point along with same wind farm.

real doggo, it cause how Power Grid optimisation works. To not simulate additional weather, day time and etc values it uses connected map values, thus keeping effect on perfomance being as low as possible. So basically since you made settlement in cave and connected a Wind Turbine Power Grid to it, then Power Grid getting wind value 0 from settlement and making it produce 0 power.

ooooh alright, i thought it worked by running it based on the tile that its on not the tile its delivering to. would geothermal work instead then or is impassable still a null value for all cases since its not meant to be inhabited?

real doggo, I not really familiar with limitations of cavern base tbh, but prob outside of Solar and Wind everything else should work without issue.