Five months ago, I installed, on our boat, four 200NG lithium batteries, Lynx BMS and distributors, CerboGX with display, and Quattro inverter/charger. The Quattro is set to a max charge rate of 120 amps, however, the highest rate it ever gets to, whether connected to shore power or generator, is about 80 amps, even with excess generator or shore power available.
Since the Lynx Smart BMS NG forces on DVCC, which thereby controls the Cerbo-connected devices including the Quattro, check the max charge current configured in the Cerbo DVCC menu: 11. DVCC - Distributed Voltage and Current Control
Thank you for the suggestion.
It does not appear to make a difference.
As you said, DVCC is forced ON but “Limit charge current” was not ON. When I turned it ON, it was set to 50A. I changed it to 120a but Quattro is still only charging at about 80a. Batteries are currently at 39% so I think it should be charging stronger.
What is your setting for the AC input current limit?
30a
I figured out the problem. I have “weak AC” turned on in order for things to work well with my older generator. If I turn off the “weak AC” option, the problem goes away and it charges the full 120a. I did install the firmware 556 update (was version 552) but it did not fix the problem. So, I will be charging at 80a max.
A strange situation does occur though when I have my PC connected to the Quattro II via the MK3 device. An error pops up on the PC screen saying Low Voltage, even though we are charging, not drawing on inverter/battery power. The indicator light on the Quattro for Low Voltage also turns on and charging stops. However, no error message shows on the Cerbo screen. The only way to reset it is to manually switch the Quattro off and on via the switch on the bottom. And then the problem reoccurs a few minutes later. This problem only seems to happen if I have the PC connected.