This past February I bought a LV-2424 I was recently able to install it at my off-grid cabin. It has been running for over a week now and I'm seeing an issue and would like to pick the brains of you folks if this is normal or potentially a faulty unit.
My system uses 4x 425 watt panels in a 2S2P configuration with a Voc 49.09 and Isc 10.78, Vmpp 41.39 and Impp 10.27 (qcells q.peak duo L-G8.3 425). This is a roughly 1.7kw array. It is connected to an 8s 280ah LiFePO4 battery with an Overkill Solar 24v BMS.
At full sun, my panel array should be generating around 20A at around 90V. The issue I'm seeing is the following:
At full sun the LV-2424 shows, in the PV1 voltage and charger power, around 88-90V input but only 200-290 watt output. I noticed that when the inverter is powered on and off or if the battery is disconnected and reconnected (through a breaker) the LV-2424 will then accept about 480 watts for a time, then switch back down to something in the 200-300 watt range. One time I also saw it ramp up and show up to 900 watt then I heard a switch or breaker go off in the unit and it completely cut off the watts to zero, then slowly let them come back up to the 200-300 range.
By looking at the BMS I see matching data in terms of charge energy, with the battery getting about 10 amps most of the time (at full sun), and up to 18 amps for a short while after a reset. The BMS can handle up to 100amps and the cells are balanced but low at 3.36 volts each so there is capacity in the battery to take charge. The LV-2424 is supposed to support up to 60amps of charge but I can't get close to that. It also seems like the LV-2424 is stuck in the "float" charge rather than the "bulk" charge, but even then is using a fraction of what the panels are generating.
Is this behavior from this unit typical or do I have a faulty unit?
My system uses 4x 425 watt panels in a 2S2P configuration with a Voc 49.09 and Isc 10.78, Vmpp 41.39 and Impp 10.27 (qcells q.peak duo L-G8.3 425). This is a roughly 1.7kw array. It is connected to an 8s 280ah LiFePO4 battery with an Overkill Solar 24v BMS.
At full sun, my panel array should be generating around 20A at around 90V. The issue I'm seeing is the following:
At full sun the LV-2424 shows, in the PV1 voltage and charger power, around 88-90V input but only 200-290 watt output. I noticed that when the inverter is powered on and off or if the battery is disconnected and reconnected (through a breaker) the LV-2424 will then accept about 480 watts for a time, then switch back down to something in the 200-300 watt range. One time I also saw it ramp up and show up to 900 watt then I heard a switch or breaker go off in the unit and it completely cut off the watts to zero, then slowly let them come back up to the 200-300 range.
By looking at the BMS I see matching data in terms of charge energy, with the battery getting about 10 amps most of the time (at full sun), and up to 18 amps for a short while after a reset. The BMS can handle up to 100amps and the cells are balanced but low at 3.36 volts each so there is capacity in the battery to take charge. The LV-2424 is supposed to support up to 60amps of charge but I can't get close to that. It also seems like the LV-2424 is stuck in the "float" charge rather than the "bulk" charge, but even then is using a fraction of what the panels are generating.
Is this behavior from this unit typical or do I have a faulty unit?