jbatx
I make stuff with things
I'm seeing what I think is inconsistent behavior from my Overkill Solar 48v 16s bms. However, it's likely working as it should and the problem is me and something I've done. Anyhow, when one cell hits the low voltage cut off, the bms appears to completely disconnect from the charge controller preventing charging. However, it doesn't do this every time. When it does, it causes the controller to see 0v on the battery and completely stop pushing current to it. The only solution I've found is to restart the bms by unplugging it and plugging it back in. I think it's likely that I've made a mistake somewhere in a SW or HW config.. Just don't know where. Please help.
Yesterday in high sun I lost power due to lv cut off and it kept charging. Last night I lost power again due to lv cut off and this morning I had to restart the bms.
System details:
1. 2p16s using batteryhookup lifepo4 cylindrical modules. 32 module delivering 200ah
2. Single 48v/16s overkill bms.
3. Renogy rover 100amp charge controller
4. App version 3.1.1026
5. Cells need to be top balanced badly. I am only able to charge the pack to about 54v before one cell causes hv cutoff. I am only able to discharge the pack to about 48v before lv cut off. This is a problem I will be dealing with shortly.
6. Four 90v 750w pv strings online. Five total - but one has an issue and it switched off.
Yesterday in high sun I lost power due to lv cut off and it kept charging. Last night I lost power again due to lv cut off and this morning I had to restart the bms.
System details:
1. 2p16s using batteryhookup lifepo4 cylindrical modules. 32 module delivering 200ah
2. Single 48v/16s overkill bms.
3. Renogy rover 100amp charge controller
4. App version 3.1.1026
5. Cells need to be top balanced badly. I am only able to charge the pack to about 54v before one cell causes hv cutoff. I am only able to discharge the pack to about 48v before lv cut off. This is a problem I will be dealing with shortly.
6. Four 90v 750w pv strings online. Five total - but one has an issue and it switched off.