question

mikeb avatar image

3 phase single phase grid

Have a possible system to install

Client had a single phase AC grid supply

Is currently having to use a 3 phase generator for his 3 phase equipment means

Wanting to install a 3 phase Quattro set up With 3 phase fronuis SYMO to make make a micro grid

I know we can use the 3 phase generator for supplement the charging that the solar is falling short of


my question is can the single phase grid supply usable for supplementary charging with the 3 phase Quattro setup

Answering the question my self I would say no

Tho I think it may be usable if a single to 3 phase converter is used ???


anyone have any thoughts on this ?


regards

3 phase
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1 Answer
Daniël Boekel (Victron Energy Staff) avatar image
Daniël Boekel (Victron Energy Staff) answered ·

Hi @mikeb

Well...it is possible to create 3 phase with a single phase feed, but this cannot be combined with PV connected to the output.

Why? because the 3 inverters have to switch as a group to enable this, if the system doesn't have grid input, it can control the PV output by changing the output frequency. But when one phase has grid input, the other phases follow this and the system cannot regulate the PV power.


The easiest solution here: use DC coupled PV (preferably with Victron MPPT's)

Than you can use a single phase grid input to create a 3 phase supply

Please note that you cannot use a grid-code and feed-in / ESS assistant.


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