I want to post some questions in regards to my MNPowerflo 5 batteries but can't seem to find a specific forum for that. Where is the best place to post those questions?
Just for context, the questions regard to the 5 parallel MNPowerflo 5 seeming to go from 84% (using LEDs as SOC indicator) to 100 % (as evidenced by Classics going to float) very quickly. Then they seem to discharge from 100% to 84% more quickly than I expect.
Please let me know the best place in the forum to post this.
Thank you,
John
Check Midnite Power website .
The import products like batteries and the all in one inverter spun off in Midnite Power. They have info on their website .
https://www.midnitepower.com/
I don't know anything about the Midnite Power batteries.
But in general with many or most lithium batteries the SOC reported from bms can get off and be inaccurate. Most bms have some setpoint criteria for when the SOC should go to 100% based on voltage.
So if it is like I imagine and that voltage was reached they would reset to 100% SOC.
( I see now that you asking about it going down in SOC not up - I don't know why )
If you want something much closer to point of truth for SOC , then get a Victron Smart Shunt for the whole pack and once calibrated is very accurate. If you have a Whizbang installed on a Midnite Controller that would probably be pretty accurate too if calibrated correctly.
Larry
I believe we emailed back and forth on this but my thinking is the cells are getting out of balance.
keep in mind a BMS will reset to 100% SOC on high cell voltage so if one cell is lagging behind or ahead the battery will go to 100% and then drain faster as that cell is not aligned with the others.
What is your float voltage on the Classics? if my memory serves me the powerflo5 doesn't start balancing until 54.8V
I personally run my float voltages on my lithiums at 55 so they always balance