At my summerhouse I have an off-grid setup with MultiPlus II 48 | 3000 | 35-32, 600W Solar panels, 2 x 4 LiFePo4 batteries (12V and 100Ah each) and a true sine inverter generator with capacity 1600W (240V x 6,67A). I have set a limit on the AC-Input to 6.0A to avoid overload on the generator. But still I experience that the generator is overloaded and cuts off. Of course, this happens most frequently when there ar sudden increases in the load when the generator runs and are swithched through, e.g. when we are running a washing machine. But it also happens when the load variations are minor: Changes in the size of 100W or even smaller can trigger such overload.
I expected that setting the limit on AC-Input would protect effectively against overloading the generator. With that limit set to 6.0A, I rarely see a load higher than 1300W from the generator in the Remote Console on LAN. It seems as if MultiPlus adds a margin to the limit an makes it even 10% lower, i.e 5.4A = 1296W in my case. I have even tried to set the margin to 4.0A, but still I experiences that the generator cuts off due to overloading, although more rarely. This is quite annoying as we can't trust that the generator supplies power to the system. We have to inspect the monitors and restart the generator many times if we try to use it when the load is not completely stable.
My question: How can I deal with this problem?