I have a 3-phase off-grid Victron system (no other source of energy, only batteries), 10kva inverter each, the battery bank is 1000AH, connected by a 95mm² cable (2 meters length) to the bus bar.
the bus bar is connected to the inverters with a 70mm² cable (1.5 meters length) each.
as for the AC output, a 10mm² cable (3 meters length).
now for the issue:
the house has various led lights and electric machines such as treadmills, water cooler...etc.
there are 4 air conditioners in the house, one of them is large (see spec image below), and it's a problem! once it's large motor starts (on remote command or after a waking up from power conservation mode) there's a blink on electricity that affects all the led lights (they go off and on again in a span of ~0.4 seconds), the treadmill stops instantly (which is very dangerous!), while other devices aren't affected at all, i.e: computer screens and TVs.
this is very annoying to the owner of the house and extremely dangerous in case of treadmills usage.
I tried the change the "boost power assist" configuration (default was 2, tried 1.5 and 2.5) but it didn't help.
I'm out of ideas and I have to solve this issue asap, your input is highly appreciated.
thank you.