question

Hi @RobertC

What are you using to monitor grid input/output. If it's a meter I've noticed that there's often a slight lag when compared to CT clamp or internal multiplus sensor.

ie for my system if 1000w of load turns on, the multiplus takes a few seconds to ramp up to 1000w to cover the load and the grid covers the difference in the meantime. I've noticed the time lag is worse on my setup using ET112 energy meter compared to CT clamp.

If this is also happening for you I imagine the spikes of grid usage are where a load is turning on during the night, maybe a fridge compressor or something similar that draws for a short period of time.

My setup is all wired in parallel with the grid (on ACIN), I'm not sure if moving loads to AC OUT side helps with this, not sure if someone else can confirm that. However I have heard folks have greater success using CT clamps/internal clamps rather than external meters.

I've also heard some of the new meters are faster however not sure if they're supported yet (i recall spotting that in one of the v3.0 Venus os Beta release notes)

Hi, I don't have external meter, measurements come from the Multiplus inverters. I know that sometimes i takes a second to balance the load for the grid to stay around 0, but that's not the case. It's happening on all inverters, but only one of them has a fridge on. I don't think it's associated with the load to be honest because you can clearly see that all inverters are sort of synced when experiencing this behaviour. Also when there would be a load or unload spike, I don't think the inverted should be able to put amps back to the battery right? It should maybe overflow to grid or feed from grid, but not actualy change status to charge.

Does anyone know what is the most newest Multiplus II 3000VA FW version? Mine are currently at 487. I don't have admin access to VRM for my install as it was done by the company. Maybe I could ask them to run the remote update for those inverters and see if that helps.

I also noticed that during these issues there's a weird growling noise coming from the inverters that comes and goes in waves of few seconds and when things settle and inverters finally realize that they should just keep inverting instead of changing to charge and discharge, then it goes away, just saying :)