krell313
New Member
Hello all, I am considering making a large (2200 A/hr) 24v lifepo4 bank but I am having a problem finding compatible BMS monitoring to connect to my existing system.
What I have now is 2 outback inverters and 3 charge controllers with a large FLA battery bank that will need to be replaced in the next few years. This system has voltage set points to close relays to signal alarms and start the generator. Voltage set points are pretty much useless for lifepo4 systems.
I was originally thinking of going with 280 A/hr cells in a 8p8s bank but fusing each cell for safely seems a bit complicated. I still worry if a cell fails it could be a big mess if the fuse fails to open. This setup would allow me to use a single Orion BMS with configurable outputs for battery alarms and automatic generator start.
A better option, I think, would be 8, 8s banks using something like an Overkill BMS but these do not have any way to activate a relay. Eight Orion BMS’ would be quite expensive.
Since this installation is off-grid and sometimes left unattended for weeks, my existing monitor/control system works well but I will have to figure out a way to get a new BMS to connect to my system.
I do worry about the 8 cells in parallel so I am looking for any suggestions on how to proceed.
What I have now is 2 outback inverters and 3 charge controllers with a large FLA battery bank that will need to be replaced in the next few years. This system has voltage set points to close relays to signal alarms and start the generator. Voltage set points are pretty much useless for lifepo4 systems.
I was originally thinking of going with 280 A/hr cells in a 8p8s bank but fusing each cell for safely seems a bit complicated. I still worry if a cell fails it could be a big mess if the fuse fails to open. This setup would allow me to use a single Orion BMS with configurable outputs for battery alarms and automatic generator start.
A better option, I think, would be 8, 8s banks using something like an Overkill BMS but these do not have any way to activate a relay. Eight Orion BMS’ would be quite expensive.
Since this installation is off-grid and sometimes left unattended for weeks, my existing monitor/control system works well but I will have to figure out a way to get a new BMS to connect to my system.
I do worry about the 8 cells in parallel so I am looking for any suggestions on how to proceed.