ESS Quattro PV switched-off once batteries in float

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perma-batteries asked May 29, '20

ESS Quattro PV switched-off once batteries in float

Hello,

We're running an ESS system comprised of a Quattro 8 kVA and 2x MPPT 250/100, PV array is 8 kWp, with a bank of 1200Ah-48V battery bank. Octo GX is running OS 2.53, and all devices are flashed to latest firmware (.473 Quattro). ESS configured in Optimized w/o batterylife, and zero feed-in is enabled. We also have DVCC enabled. BMV-712 external monitor.

Once the battery state from absorption to float, (Quattro's status) the PV suddently switches off, although there is still consumption on the ACOUT side :

This is puzzling as this is happening during the day and there is still plenty of PV power available. This energy mismatch is not understandable, as the PV charger should match the AC outside power....

Any ideas ? We have tried all combination possible (battery life enabled or disabled, DVCC on or off, etc...).

Thanks a lot,

ESS solar

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Answer 1 · 2020-05-30T07:52:49Z

Daniël Boekel (Victron Energy Staff) answered · May 30, 2020 at 07:52 AM

Hi @perma-batteries

when does the PV start again? once the battery reaches float voltage?

If so this is normal, the voltage first has to go down to float voltage until the MPPT can produce again.

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