question

jaqibar avatar image
jaqibar asked

Single phase 240v input to three quattro 10kva to supply three separate split single phase 240v output

We have an installation that we would like to convert from and three phase supply with neutral, to a single-phase configuration. Now getting to single phase is simple by removing the other two phases out of the equation. The tricky part is that the single phase will supply three 10kvA quattro’s 230V and these will be connected to three separate single phases connected to three separate and independent loads. To add more complications is do I add an PV grid tie Inverter to each line apart on the Quattro output, or one three phase Pv grid tie to all three quattro’s (the probability of unbalanced loads will always a factor)? Now to make even more interesting an additional 30kw single phase generator will be replacing the grid coming from outside to property.


My question is if this will be possible , if not what will be the solution ?

MultiPlus Quattro Inverter Charger
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Daniël Boekel (Victron Energy Staff) avatar image
Daniël Boekel (Victron Energy Staff) answered ·

Hi @Jaqibar

Why would you not use a normal 3 phase setup here? and a 3 phase generator? (the generator can probably be wired for 3 phase also)

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jaqibar avatar image jaqibar commented ·

Hi @Daniël Boekel. There are no 3phase equipment on premises and client is moving over to single phase connection, as the connection will also be removed later. The system is going to provide for three distant houses, where PV mounting isn’t possible at each location. If three phase I believe there might be a constant imbalance between the phases as not one will be drawing the same size loads. This will create a larger limitation on generator trying to increase one of the generators.


At this stage we are looking at three completely independent systems with each having its own battery bank and GX unit.

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Daniël Boekel (Victron Energy Staff) avatar image Daniël Boekel (Victron Energy Staff) ♦♦ jaqibar commented ·

Generally it's better to have one big system with one battery, this way all PV and generator power can be used for all three houses.

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