I upgraded my single 5kVA multiplus II to two of them in parallel.
Since the upgrade the grid setpoint tracking is A LOT worse than it was before.
With the one multi it was tracked very well. Now with the second one, there is a lot of feed in back in the grid and as the load increase, the feed back gets more. For example with a load of about 5kw there is a constant feed in back to the grid of 300W. With about 2.5kw there is a constant feed back to the grid of about 200W. And with low loads there is a constant feedback of about 50-100W. This isnt spikes when the load changes, but a constant feedback.
Luckily my prepaid meter doesnt trip - but it is charging me for the feed back into the grid…
Does anybody know how to improve the grid setpoint tracking when you use multis in parallel? Does it help to use an external energy sensor?