I've noticed that battery 6 seems to always lag in SOC%, but the voltages across all 6 batteries is balanced. When CHMOS turns off for all batteries, Battery 6 rests at 90-92%. Positive feeds the busbar at the top with the fuse, Negative feeds the busbar at the bottom. Is this something to worry about with Battery 6?
LifePower4 Battery SOC%
- Thread starter Sennen
- Start date
Look at the temperature of the bottom battery, it's much lower than the rest of the stack, that is most likely why it's "behind" the curve. I see the same thing on my stack of 3, the one closest to the heat source accepts and discharges a little faster than the rest.
EG4_Jared
Online Support for EG4 Electronics
I would recommend ensuring that all LifePower4 batteries are on the latest firmware due to having improved performance in parallel.
Link to firmware: https://eg4electronics.com/categori...wer4-48v-100ah-lithium-iron-phosphate-battery
I'll check. I did them all at the same time, but not sure what version they are. I know the comm hub is 1.1 and there's a new version since then
After Firmware update on Comm hub and Batteries, everything seems to be reporting properly now. Had to press the "Up" button on the comm hub 557 times to override the charge voltage from 57.6 to 55.7 since the override started at zero. ( see https://diysolarforum.com/threads/c...d-eg4-communications-panel.75066/#post-979663 ) As soon as batteries came back online and comm hub came back online, solar output dropped to zero as it was trying to feed it to batteries that weren't accepting a charge. Still would like to be able to set BULK/FLOAT values separately through the comm hub.
Thanks for the suggestion, @EG4_Jared
Thanks for the suggestion, @EG4_Jared
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marionw
Solar Enthusiast
When you update the LifePower4 firmware you should also verify the EG4 Communication Hub also has the latest firmware. The Hub and batteries communicate using pins 7&8 of the RJ45 jacks and the firmware update increases the baud rate from 9600 to 19200 for this RS485 bus.
Even though the "CMOS: On" indicates "Off" pay attention to the "Limiter" as well as the "Current" indicators, in some cases the BMS will cycle the "Limiter" to ON and you will see the "Current" momentarily increase indicating the BMS is still trying to charge even though you may have a cell indicating OVP (Over Voltage Protection).
Periodically (hopefully not often) you will need manually take control of the charge process to ensure you get cell balancing within each battery as well as battery to battery balancing.
Even though the "CMOS: On" indicates "Off" pay attention to the "Limiter" as well as the "Current" indicators, in some cases the BMS will cycle the "Limiter" to ON and you will see the "Current" momentarily increase indicating the BMS is still trying to charge even though you may have a cell indicating OVP (Over Voltage Protection).
Periodically (hopefully not often) you will need manually take control of the charge process to ensure you get cell balancing within each battery as well as battery to battery balancing.
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