question

peromb avatar image
peromb asked

ESS Grid Feed In – no communication to MPPT

Hello,

We have recently completed a quite complex ESS system, built of 18 MPPT solar chargers, 12 Quattros, OPzS battery bank, BMV-702 and a CCGX.

Only one MPPT charger is connected to CCGX with VE.Direct cable, the rest 17 chargers just charge the battery bank individually, without any communication.

For now, the “feed-in excess solarcharger power” is set to OFF, as it is not allowed. But soon this is about to change, and sometimes there is some energy surplus, which could be feed-in to the grid. But will this be possible, considering only one charger is connected to CCGX?

Many thanks and kind regards,

Peter

MPPT ControllersESSCCGX Color Controlgridsolar
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1 Answer
boekel avatar image
boekel answered ·

Yes this is possible, if it doesn't work automatically there is a trick:


-set charge voltage of Quattro's lower than the MPPT's, in ESS they will discharge into grid to get to this voltage.

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