I have 3kw of enphase microinverters connected to AC1 out of my mp2, parallel to the loads. In ess mode there are settings for frequency shifting, but where do i find the charging settings that determine the moment for the inverters to start frequency shifting and shutting down? Is it the same setting in the ve config. Charger tab, or is that just for charging via ac input on the mp2?
I had these settings when configure the ESS assistant with an MK3 interface.
The exact frequencies should be asked during configuration of the ESS Assistant, when you select that there is PV wired to AC-Out.
Usually there should be no need to adjust them, the defaults are commonly used values.
Enabling the PV again is determined by the system, or latest by the “PV-restart voltage”, whatever comes first.
Don’t set this to high, with regards to the Factor-1 Rule, your batteries need to be able to absorb a 3kW Peak at any time.
Yes the frequency was asked and set accordingly to the enphase system.
But the frequency should shift to turn off pv inverters only once batteries reach full soc, not before, so what area in the settings determines the cause of the frequency shift, as i need to adjust that area, not the frequency shift frequencies. Im thinking charge voltages bulk , float etc need adjusting fot the inverter to knowwhen to frequency shift. These are already set on the mppts, and on the charger tab of the inverter, but is there another area ive over looked so frequency shifting only starts to happen at full soc? At the moment tje frequency rises to 52hz in pulses, and the pv inverters never turn on, even while batteries are charging via mppts and are at a low soc.
Basically the Charge Current Limit of the Battery plus consumption will determine that.
If the overall system currently can only process like 4kW power, the pv inverters will be reduced to that output.
Generally, AC-PC is throttled / shutdown first, DC MPPTs are kept online for longer, because they can be controlled easier.
The pv inverters seem to stop even when theres hardly any solar energy, during times when very cloudy and the mppts are only producing 1 or 2 hundred watts
So to get around this, i decided to feed unto the grid when soc reaches 95% with assistant grid relay on at 95%, and said “no” in the pv inverters tab. Like that the pv inverters stay on and charge the batteries, and the batteries dont seem to over charge, they stop and the mppts ramp down and a clamp meter shows zero amps on each battery cable once 100% soc is reached, so i may leave it this way, unless i find a solution with the pv inverters.