AlaskanNoob
Solar Enthusiast
- Joined
- Feb 20, 2021
- Messages
- 914
About to leave the homestead for a bit and I'm going to shut down the system because I haven't yet insulated the shed where my batteries are in. But I had the bright idea of connecting my Cerbo (everything else off) to this string of 4 x 12V lithium wired up in series for a 48V bank, just so I can continue to log the various temperature sensors.
But since I'm sure if these batteries have a BMS (the newer version currently sold does, but I'm not sure about this older version), is there any fire risk when the temps drop possibly to -7F or so? Cerbo has one wired temp sensor in it and reads some bluetooth temp sensors. I would imagine it's a very small load and would think this would be manageable and they won't be getting charged, but is there still a fire risk? I'm willing to gamble with battery life being reduced with these, but I'm not willing to gamble with fire risk. I don't think there is a fire risk from potential over discharge, but I can't afford to get this wrong.
The battery manufacturer (Batteries Plus) for the newer version of this battery says it can discharge down to -4F. At 0F it can deliver 70% of its rated capacity. It usually does't get colder than -4F here, but I have seen it as cold as -7F during one winter, so if that happens, and there is a small load on the batteries at a temp just below its rated operating temperature, could that be a fire risk or would it just reduce battery life?
Many thanks for any help!
But since I'm sure if these batteries have a BMS (the newer version currently sold does, but I'm not sure about this older version), is there any fire risk when the temps drop possibly to -7F or so? Cerbo has one wired temp sensor in it and reads some bluetooth temp sensors. I would imagine it's a very small load and would think this would be manageable and they won't be getting charged, but is there still a fire risk? I'm willing to gamble with battery life being reduced with these, but I'm not willing to gamble with fire risk. I don't think there is a fire risk from potential over discharge, but I can't afford to get this wrong.
The battery manufacturer (Batteries Plus) for the newer version of this battery says it can discharge down to -4F. At 0F it can deliver 70% of its rated capacity. It usually does't get colder than -4F here, but I have seen it as cold as -7F during one winter, so if that happens, and there is a small load on the batteries at a temp just below its rated operating temperature, could that be a fire risk or would it just reduce battery life?
Many thanks for any help!
Last edited: