I would like to run an off-grid system with CAN-connected 48V battery and DVCC, but with a twist.
Instead of connecting the generator to the AC input of the Quattro/Multiplus, I would like to leave this inverters AC input free, and connect an extra Quattro/Multiplus to the generator just for charging purposes.
In this way, I would be able to avoid the system switching over to generator power (and associated lower quality signal when it comes to interference, spikes, drops, sine wave harmonics etc..)
This would also allow the generator to be of much smaller dimensions, as it would not need to be large enough to power the whole electrical installation on its own. The 'inverter-mode' Quattro I could then dimension have much higher peak power. (and I could add more still to connect in parallel, to raise the peak power higher)
This would make the system operate a bit like a Full-conversion-UPS (at least when the generator is running. Solar will obviously provide most of the power)
The generator could charge the battery slowly, and only if the Quattro in inverter mode has been taking too much power for too long and solar is not sufficient, would the battery discharge too much and would I run into issues (but not likely in my use case, as the peaks might be high, but the amount of kWh at the end of the day is rather low)
The problem I'm running into is: I cannot connect the extra 'charger' Quattro to the same Cerbo VE-Bus as the 'inverter' Quattro. The only way to get this to work properly is by connecting VE-Bus of the charger Quattro to Cerbo via MK3 USB interface, so that an extra VE-Bus gets created.
Here lies the heart of the problem: DVCC does not seem to operate over USB MK3.
The charger Quattro (connected via MK3) does not respect the maximum charge current limit set by DVCC.
Is this a software bug? Or is what I'm trying to do somehow so unique that no one has needed this before? :)
