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ET avatar image
ET asked

False reading on CCGX in AC-Coupled System with Quattro

Dear,

I have an AC-coupled installation with Sungrow 2xSungrow SG50CX PV Inverters and 6xQuattros 15kVA (2 in parallel on each phase) and 140kWh Yilink lithium battery storage with built in BMS recognized as Pylontech on the CCGX. The PV inverter is connected to CCGX through Energy Meter EM340 and connected through RS485 to USB cable. When the PV inverter production is zero during night or if the PV inverters are off, the load reading is correct, but the PV inverters are producing power the load reading decrease to zero then go back to 400W on only one phase as shown in the attached video. in addition the battery shows that they are discharging on the CCGX while they are charging.

Please note that the energy meter is set to be on AC output in the CCGX configuration.

MultiPlus Quattro Inverter ChargerLithium BatteryAC PV Coupling
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1 Answer
CM avatar image
CM answered ·

Any shunt in this system, check the direction of cabling , probably wired wrongly

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ET avatar image ET commented ·

no shunt is installed in the system, the batteries are lithium and they are communicating with CCGX through bms.

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