I have couple ideas to improve SF electicy.

1. Backup Generators
This one can be understand from the name, starts to generate when all primary generators and capasitors ran out.

2. priority generators
For example i want to use Bucket of fuels as my primary electric source. When they ran out coal generators will start to generate power and if primary generators is not enough to handle electric demand, secondary (coal generators etc.) Will run to support primary generators. Same think applies to capasitors but bigger the capasity = high priority.