Hello,
I’m posting here in the hope that you can help me with a problem that I’ve had since the beginning of the system installation. I mention that I’m an installer and I have several systems installed that work without any major problems.
I have a system composed of the following:
- A MultiPlus-II 48/10000/140-100/100 inverter
- Three SmartSolar MPPT VE.Can 250/85 rev2 solar chargers
- A Cerbo Gx
- An ET112 Energy Meter mounted on the grid.
- Two Lynx Distributor
- A Lynx Smart BMS NG
- Four LFP-51.2V/100 NG batteries (mounted in parallel)
The cables used for the connections are as follows:
Between Mppt and Lynx, conductors with a section of 35mmp were used.
Between the batteries and Lynx, conductors with a section of 35mmp were used.
Between Lynx and MP2, 95mm2 conductors were used.
The system is mounted in such a way that the whole house is on AC out, but we also provided a bypass method to put the system in parallel (on grid) with the network in case of a failure.
The off grid system works perfectly. The problems occur when connecting to the network.
Issue 1. The system tries to charge the batteries from the grid. I tried to turn off the charger in Ve.Configure, leave Charger on and change only the current to 0, change the maximum current in DVCC to 0…without any effect. As soon as I switch the operating mode from “inverter only” to “on” it starts to draw from the grid and spikes appear on the battery charge part.
Issue 2. The system enters Passthru even at 200W power and no longer draws from the batteries.
Issue 3. The system, at certain times (I noticed that at consumptions of 3-400W) does not want to discharge from the batteries when connected in parallel.
Issue 4. L1 Overload device even at 10A power.
Issue 5. Grid Meter disappears. It is completely random when it happens (it is an error that I have noticed on several systems).
Below I will try to attach pictures and videos of the inverter’s behavior.
I have tried to contact other fellow Victron installers and so far no one has been able to understand what is happening.
