I've been using the EG4 6000XP units with lead acid mode since I've struggled to get my various EG4 batteries to communicate properly. Even after updating firmware and making custom cables, switching to lithium mode just causes the inverter to fail to boot. Given the current prices of eco-worthy batteries, it's apparent that many users have difficulty achieving connectivity with the 6000XP units, especially when mixing batteries. I've been fine running in lead acid mode; my main concern was about the smart load feature that depends on State of Charge (SOC), which requires communication. However, since the feature also uses voltage for readings, I haven't faced major issues. What do you all think about prioritizing battery communication over using lead acid mode?
1 Answer
I totally get your concerns! I've found that charging controllers without battery communications can mess up the equalization process, especially if they try to push higher voltages that aren’t safe for LiFePO4 batteries. Plus, I've noticed that if you have multiple controllers, they don't seem to sync up properly on when the battery is fully charged, leading to some controllers entering float mode too early. That's definitely a hassle!
You might be able to solve that by switching to user mode and adjusting the settings for lithium via the RS485 connection. I did that with mine, and it worked fine without any equalization issues. My BMS usually kicks in to shut off charging when the cells hit around 3.65V.