I liked that in IC1 there was a function that you place in a stack of RE batteries place a chest next to it and later when you come back the chest is full of batteries.
I also created a new design how it could look so you could also stop the process by taking out only the charging battery:
On the left you can place your stacks of batteries and whn a battery is charged it will pop int a chest next to generator.
Generator
Solar Generator
Geothermal Generator
Wind Generator
Water Generator