I'm hoping to get some assistance. I have been struggling to get my 2x multiplus-ii 5kw units in parallel setup correctly. Sorry. Let me phrase that again. They are set up precisely, in parallel, according to the user manual and is running, but the one always supplies all the load and goes into overload the moment I start pulling more than 5kw, the other unit does nothing the entire time.
When my system goes to pass-through mode, I can see that both AC cable runs thought the individual inverters are carrying the same amount of current. I have Volt and Amp sensors on both input and outputs of my multis to confirm this.
On the DC side, I have double-checked every connection, cable type and cable length, and places DC shunt current sensors inline with both inverters. The resistance through both DC runs should be very close to exactly balanced, but the one inverter will carry 80 to 100A (55V system) and the other inverter is sitting at 0.03A.
To make sure it wasn't anything to do with DC cables/system, I swapped the inverters around on the wall and kept everything else the same. The problem then moved with the inverter.
So my question, can anyone think of something else for me to test/configure/do? Or is it a faulty inverter.
Something I have noticed is that the inverter that never carries any load is disconnected from the shared AC bus, it fails with overload immediately, and then takes down the whole parallel system. It will not start again unless it is corrected to the shared AC bus, it just ends up in a overload loop and resets.
Lastly, I have upgraded my multis to the latest 469 firmware.
PS. Here is my .rvms file to have a look at my configured setup.
Any assistance would be appreciated.