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AC coupled system cold start

Assume a Multiplus with a battery and an ac coupled Fronius Primo in an Off grid situation.

Can the system recover from a completely no power situation (battery discharged, no ac grid) or is the system in a deadlock then even if the sun is shining?

offgridAC PV CouplingFronius
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Matthias Lange - DE avatar image
Matthias Lange - DE answered ·

A Fronius needs external 230V to startup but if the Multi shut down due to low battery you have no chance to startup again without external energy (grid or generator)

So in an off grid system you also should have a few DC PV chargers.

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