So I have a challenge. I need some advice. We have a vessel with 240v shore and generator power. The system has the appropriate break before make selector switch for shore and generator power. When one is selected, L1 and L2 split to feed two ac breaker panels (main 1 and main 2).
We are getting ready to do a galley upgrade with a 240v induction cooktop and oven. To use this at anchor I have two Victron Quattro 120/5000 inverter chargers. I was originally going to parallel them with the same leg of ac then step up the voltage with a Victron auto transformer to yield approx 10 kw 240v output. In paralleling the inverters it will automatically adjust the phase if the inverted ac output.
It has recently occurred to me that I might hook one up to L1 and the other to L2 so when attached to shore power there is more amperage to pass through. If I do this, do I still need to configure the system for parallel operations? Are there any issues with this approach?
@Valhowell I am having a little trouble understanding the question. Perhaps others will catch on better than I but a basic drawing would help me visualise the configuration.
@Valhowell thanks for the drawings but I confess I have had nothing to do with the North American system of split phases of 2 x 120 volt inputs to produce a 240volt source. In my experience when Multipluses are paralleled they are configured exactly the same but maybe in this split phase configuration they can be fed from different phases. Sorry but I am out of my lane here and have never installed one like that.
Yes, you can use two 60Hz 120V Quattros and configure them for 120V/240V split-phase (with each unit making 120V, 180 degrees out of phase). I’ve done the same thing. You would connect L1 to the first unit, and L2 to the second unit, tie the neutrals together. The Quattros have 2 respective AC Inputs and AC Outputs - don’t make the mistake of connecting L1 to AC Input 1 on the first unit, and L2 to AC Input 2 on the second unit (they should both be same Input, as should your loads on the same Output)
In such a configuration, the units aren’t technically running in parallel so your wiring doesn’t need to be exactly identical between both units. You would use VEConfigure to configure them. Please watch the Victron Professional training video on configuring 3 phase systems (it’s quite similar, but just “2” phases configured 180 out of phase). Victron Energy - Victron Professional
