Quick answer
Connect one source, confirm the city receives power, then fix capacity before buying more output. A full or capped city can make extra generators look useless.
Connect generation to a Power a City city or village, recover from cap messages, and choose the next grid expansion safely.
Follow a connect -> capacity -> city-upgrade loop: place the source, connect it to the target, check for maximum-power or not-enough-power messages, then upgrade the city or add generation based on the visible blocker.
Use this qualitative connect-and-expand checklist with an unknown-controls panel: connected, capped, underpowered, or ready to expand.
Selected source watch notes and explicit unknown capacity/control fields stay visible until stronger reproducible evidence exists.
power gridgeneratorsvillagescitiescity upgradeenergy sources