Batteries Don't Charge When Connected To Coal Generator

Make sure coal generator have some fuel inside and working. Its known bug then dupes do not bring coal to generator and its idling.

I have to put the coal gens on priority 9, as dupes will do everything else instead of delivering coal.

I was putting coal in but the large batteries showed zero build in energy.

vonVile, you should report that as another bug.

Strange, when I hook up a battery to the Coal Generator, it is indeed being charged.

As mentioned, are you certain that the Coal Generator was running and outputting energy at the time?

The batteries charge out of the "wasted" energy poured out by the coal generator.

If your coal generator is generating 800W of energy and your elecrtical system use 800W of energy, your battery won't charge up, simply because there's no energy left for them.

Try building another one, or more, and disable them as soon as all batteries are charged up.