edclarke
New Member
- Joined
- Apr 25, 2021
- Messages
- 5
I'm planning a battery bank for a van camper conversion, and hoping the community here can help me understand the pros and cons of these two scenarios (or offer more elegant solutions). Thank you in advance for your help!
Design goals
- Fully power a 3,000 Watt inverter
- Handle up to 500W of DC load
24 Volt 560Ah
Pros
- Some smaller cable sizes
- Only need one BMS
Cons
- Will need a 24-12V converter
- a little more complexity
- slightly more expensive 24V devices (when available)
Two 12 Volt 560Ah banks
Pros
- Less complexity
- Some redundancy
Cons
- Need 2 BMS
Concerns
- In both of the depicted scenarios two cells are paralleled before the series connection, and the BMS connects to the paralleled positive terminals. How does the BMS respond to a failing cell when it is connected to another?
Design goals
- Fully power a 3,000 Watt inverter
- Handle up to 500W of DC load
24 Volt 560Ah
Pros
- Some smaller cable sizes
- Only need one BMS
Cons
- Will need a 24-12V converter
- a little more complexity
- slightly more expensive 24V devices (when available)
Two 12 Volt 560Ah banks
Pros
- Less complexity
- Some redundancy
Cons
- Need 2 BMS
Concerns
- In both of the depicted scenarios two cells are paralleled before the series connection, and the BMS connects to the paralleled positive terminals. How does the BMS respond to a failing cell when it is connected to another?
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