I use MultiPlus II 48/1600/20, CCGX, MPPT Solar Charger 100/20 and third party BMS 48V-100Ah LiFePo battery. During the sunny day, the Solar Power drops from max to 0 few times a minute. Inverter started to discharge the battery until the PV Power raise. System configured with ESS and "Keep batteries charged" mode. Without DVCC. The differents between dashboard screenshots is actually few seconds. Could anyone help me?
I'm suppose that problem was solved. My consumption was equal 260W but the Solar Power on peak reached 800W. And with feed-in disable - the excess energy had nowhere to go. When I increase the charge current on MPPT to 7A (7*48=336W), which is enough to cover the consumption - the problem disappeared.
Hi, there isn't enough to go on.
Pull vrm charts (or use victron connect) to show what PV voltage is vs battery voltage.
Panel voltage could be dipping beneath the battery +6V threshold and moving to an off state.
Pull charts that show the BMS CVL and CCL. The BMS may be limiting the MPPT via DVCC.
Or you could have a bad connection, wiring or panel.
Any number of reasons.
BMS is not connected to the system. It's only built in battery.
DVCC is disabled.
I see that MPPT state occurs Fault frequently. How can I find out why?
Connect to the mppt via bluetooth and victron connect. It should record the fault.
It might also be in event/alarm logs on VRM.
Should also be in the cerbo, under the mppt's entry - daily history records the last error state.
I saw this error before. But it's not as often as the problem happened.
Check the specs (Voc) and make sure you allow for peaks due to cooler temps.
You are at risk of smoking that mppt.
Again, victron connect will show the peaks recorded, or the daily history tab of the mppt on the GX.
It happens because of pv power drops and charger became "disabled". Than the PV current fell to 0 and PV voltage jump to 95V+
I think, it's connected directly to the main problem.
That can't cause it. Battery side voltage can spike if the battery disconnects unexpectedly.
What are your panel specs?
The chart you showed says it is capable of running at 101V or more so it is incorrectly configured. Nothing will resolve until that is fixed.
That is the wrong MPPT/Panel combination.
Nope. This is why the mppt sizing calculator needs to be used before any decisions are made.
Sorry.
