Originally Posted by Catalysis
You are correct there will always be two chargers connected to the battery banks .
The isolation transformers are rated for 50/60hz service
and the Mastervolt Chargers and also 50/60 cycle rated.
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Actually, I think you only have one charger when on 50hz power. If that one charger failed, you would not be able to utilize shore power
to charge batteries. You would have to charge via your generator
and the Mass Combis.
I think the original comment made by someone else was that if you are connected to 50hz shore power
and running 60hz loads on board that exceed about 2400 watts (the output capacity of your charger), you will be draining your batteries. That's not a big deal for transient loads, but if they are sustained loads at that level you will eventually drain down your batteries.
I think in practice, you will be exposed to this if you are running your HVAC
off 50hz shore power. If you were to add a second charger then you would have 4800W of charging capacity and can support the same as a sustained load. With that, your HVAC
can probably cycle on an off while at the same time leaving enough charge capacity to bring your batteries up to full charge as well. Plus you get the added bonus of redundancy. If one of those chargers fails, you can still utilize 50hz shore power using the second charger, though of course your capacity would drop back down to 2400W.
If you don't add a second charger now, you might consider leaving space for one when you lay out equipment
. Then if you later decide to add it, the job will be much easier than if you need to relocate other equipment
to make room.
One other comment. I see that each of your Mass/Combi units sends passthru power to a how water
heater. As drawn, I'm assuming you have two separate hot water heaters, or perhaps a single HWH with two separate heating
elements? I just want to be sure you are not planning to wire together the outputs of the two inverters.