Hello,
I have a Quattro 12/5000/220-100/100 230V installed and operating on board. I would like to connect a photovoltaic system on the AC side of the output. I have read that the inverter is switched off by raising the frequency to 51 Hz. The former forced shutdown at 50.2 Hz no longer exists. New inverters reduce their output over a range of >50 Hz to 51.5 Hz. That would mean that power is still being fed in at 51 Hz. Would the Quattro be able to raise the frequency further, or does it stop at 51 Hz? I cannot say much about how old the Quattro is. I look forward to your replies.