Why would my inverter not be charging the batteries when it is on the generator? I have a Victron Quattro-II. The generator is on AC 2 and the generator on AC 1. The generator is an 8kVA one and its output is around 224V and naturally fluctuates a bit.
The charging issue is secondary. The inverter does not register the AC on either input 1 or 2 coming from the generator. Obviously it won’t charge the batteries if the is “no AC”.
However, when I connect to the console and go into the inverter, it shows “Active AC Input” as Disconnected, but AC-In L1 reads 225V. The frequency fluctuates quite a bit. Anywhere from 50Hz to 53.4Hz. Could this be it? Must the frequency be more stable before the inverter “accepts” it as grid power?
Yes. If you are not grid-tied, you are allowed to do that, and it may in fact be the only way to make it work.
As far as I know you can configure this per-input on the Quattro, so usually you’d put the generator on AC-in-1 and configure it rather promiscuously, and you’d put the grid on Ac-in-2 and configure it strictly according to the grid code.
(why generator on AC-in-1? Well, because that has priority. When two AC-inputs are both active, the Quattro selects the first one that is acceptable. By placing the generator on AC-in-1, simply starting the generator automatically uses it, without extra switching).