Hello,
I’ve got 3 Multi’s making up a three phase system, with batteries, an MPPT and a Fronius PV inverter on AC Out.
Since the system is running off grid, I’ve installed the PV Assistant on each Multi.
What I’ve noticed is that when the batteries are nearly full the MPPT goes from Absorption into Float mode and the Multi’s will shift frequency so the Fronius PV inverter starts throttling PV power.
The Multi’s stay in Absorption mode though, they never go into Float mode.
Before the PV was installed the batteries were charged from a generator and then the Multi’s went to Float mode, as expected.
Is it normal that the Multi’s stay in Absorption and don’t go into Float when battery charging is done using AC power from PV on AC Out ?