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Anil Ghatikar avatar image
Anil Ghatikar asked

Quattro battery charging voltages not observed with BYD battery when DVCC is enabled?

Hello

All firmware for 3 Phase 5 KVA quattro , Venus and charge controllers , fronius are latest with BYD 10 KWH pro batteries - system VRM ID is TapetaMain

While troubleshooting my random switch offs I observed the following behaviour

The Battery sits steady at 55.5V and occasionally jumps to 55.6/55.7 volts at fill SOC Despite the Quattro settings of 55.0 as float and 55.2 as absorb

Both DVCC is on and the solar charge controllers show Remote control active .

See screenshots

has something changed in DVCC alhorithm ? I suspect my issues are linked to BYD switchiing off in Overvolatge when large load swings happend such washing machine or dryer happen .




MultiPlus Quattro Inverter ChargerDVCCBYD
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2 Answers
Anil Ghatikar avatar image
Anil Ghatikar answered ·

@BYD_service - @Guy Stewart (Victron Community Manager)- @Daniël Boekel (Victron Energy Staff) I think there is an issue with the voltage setpoint. The system is under observation and consistently float remains on 55.5V to 55.6 V despite setpoint at 55V

All firmwares latest on Quattro and smartsolar VRM is running 2.57 VRM ID is TapetaMain





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Daniël Boekel (Victron Energy Staff) avatar image
Daniël Boekel (Victron Energy Staff) answered ·

Hi @Anil Ghatikar

the charge voltage is controlled by the battery, not the Quattro settings, please read the manual on DVCC:

https://www.victronenergy.com/live/ccgx:start#dvcc_effects_on_the_charge_algorithm



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Anil Ghatikar avatar image Anil Ghatikar commented ·

@Daniël Boekel (Victron Energy Staff) - Thank you. I am aware of effects of DVCC What puzzled me is why the setpoint moved from 55 V to 55.6 as obviously the CCL hard limit of Zero is used to reach Float stage and the only thing changed in my system was the firmware on Quattro and update of Venus

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Daniël Boekel (Victron Energy Staff) avatar image Daniël Boekel (Victron Energy Staff) ♦♦ Anil Ghatikar commented ·

Hi @Anil Ghatikar

the setpoint has to do with: CVL sent by batttery, CCL sent by battery, ESS mode.

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