Swamplizard
Ready to unplug and wander the USA
- Joined
- Oct 21, 2020
- Messages
- 238
Hello All - I successfully built a nice 280AH 24V for my Overlander and will be adding another 400AH shortly and will do it 100% "right".
However, I have accumulated a few LifePO4 batteries of various sizes and manufacturors and need a small battery to drive some stuff on my boat - low Amps, low expectations, 12Volt, nothing critical or crazy....so thought I would cobble together a franken-battery and break some rules and see what I get out of it.
Will use EPEVER MPPT to charge with a couple flexible solar panels and will of course have an appropriate BMS. Will not be pushing these by charging all the way to 3.65v ... conservative setup.
Inventory:
2 75AH new
2 72AH older
4 50AH older
4 180AH new
Chemically they are all similar LifePO4s. All can be charged to 3.6 without any perceptable swelling.
Thinking 4x180s one one BMS, 2x75s and 2x72s on another BMS, and 4x50s on it's own BMS. Connect all three "packs to a bus bar with fuses and the MPPT. Theretically would end up with 302AH of 12volt capacity which would be a decent house battery for the boat.
Pros/cons?
Thanks for inputs.
However, I have accumulated a few LifePO4 batteries of various sizes and manufacturors and need a small battery to drive some stuff on my boat - low Amps, low expectations, 12Volt, nothing critical or crazy....so thought I would cobble together a franken-battery and break some rules and see what I get out of it.
Will use EPEVER MPPT to charge with a couple flexible solar panels and will of course have an appropriate BMS. Will not be pushing these by charging all the way to 3.65v ... conservative setup.
Inventory:
2 75AH new
2 72AH older
4 50AH older
4 180AH new
Chemically they are all similar LifePO4s. All can be charged to 3.6 without any perceptable swelling.
Thinking 4x180s one one BMS, 2x75s and 2x72s on another BMS, and 4x50s on it's own BMS. Connect all three "packs to a bus bar with fuses and the MPPT. Theretically would end up with 302AH of 12volt capacity which would be a decent house battery for the boat.
Pros/cons?
Thanks for inputs.