Using Smart Batteries to fully charge Heavy Batteries in an automation grid

Is there 2 pictures to show you how to deal with 20 Kj smart battery as a 40 Kj battery

What is required :

- 2 Smart batteries (set at 100% and 0% for both)
- 1 XOR Gate
- 1 Power Shutoff
- As Heavy Battery as you want (no limit)

In early Game you can do it :

What is required :

- 2 Smart batteries (set at 100% and 0% for both)
- 2 AND Gate
- 2 NOT Gate
- 1 OR Gate
- 1 Power Shutoff
- As Heavy Battery as you want (no limit)

In these pictures, the smart battery at right will charge first, when done, second battery at left will charge. When both are full, generators will turn off and first smart battery at right will start to supply electricity and to empty, when empty, second at left will supply electricity. When both are empty, generators will start to charge up.

Any of no managed electricity supply like manual or solar panel will not affect the system, it can only make generators be off for a longer time.

With this system, if all Heavy Batteries are empty, generators will start to charge them until they reach close to 40 Kj (they can lost 2% charge every cycle).