question

hussein-khamis avatar image
hussein-khamis asked

AC COUPLING TO DC COUPLING SYSTEM DESIGN

Am planning to install a 10kva system ac and dc coupled system the system which was designed by the installer had PV passing through two mppt 150/100 to battery bank. Quattro inverter CCGX

My question comes the installer advised that one can add an additional fronius inverter to the system after the designed has already factored the 1:1 rule as long as it’s rated smaller than the overall inverter charger. Meaning that there are two fronius e.g 10kva and 5kva on a quattro 10kva bus

AC PV Couplingdc system
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alan avatar image
alan answered ·

No, total AC coupled needs to match 1:1.

So 10Kva Quattro, 10Kva worth of fronius. This could be multiple units or 1.

Anything DC coupled doesn’t count to the limit.

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