I need a 72 volt battery. I have 2 36 volt packs. If I wire them in series, how would I wire a bus to them and charge it? - Quora
![Charging two 12V lead-acid series batteries separately with one 12V solar panel - Electrical Engineering Stack Exchange Charging two 12V lead-acid series batteries separately with one 12V solar panel - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/oEaiB.jpg)
Charging two 12V lead-acid series batteries separately with one 12V solar panel - Electrical Engineering Stack Exchange
![Charging 24V Battery with 12V Alternator and Isolator - Motor Vehicle Maintenance & Repair Stack Exchange Charging 24V Battery with 12V Alternator and Isolator - Motor Vehicle Maintenance & Repair Stack Exchange](https://i.stack.imgur.com/muVml.jpg)
Charging 24V Battery with 12V Alternator and Isolator - Motor Vehicle Maintenance & Repair Stack Exchange
![batteries - Charge at 24v and discharge at 12v for battery system - Electrical Engineering Stack Exchange batteries - Charge at 24v and discharge at 12v for battery system - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/JYItk.jpg)