Troubleshooting - Goodwe ET Series User Manual

4.2 Troubleshooting

Checks Before Turning On AC Power
• Battery connections: Confirm that the connections between the ET and battery and that the
polarities (+/-) are not reversed. Refer to figure 4.2-1
• PV input connection: Confirm the connections between the ET and PV panels and that the
polarities (+/-) are not reversed. Refer to figure 4.2-2.
• On-grid & backup connections: Confirm that the on-grid is connected to the power grid and
that the backup is connected to the loads and that the polarities (e.g. L1/L2/L3/N are in
sequence) are not reversed. Refer to figure 4.2-3.
• Smart Meter & CT connections: Make sure that the Smart Meter and CT are connected between
the house loads and the grid and follow the Smart Meter direction sign on the CT. Refer to figure
4.2-4.
Figure 4.2-1 Figure 4.2-2
Checks At Startup And Turning On AC Power
Battery settings, BMS communication and safety country setting:
After connecting the Solar-Wi-Fi* (*The Wi-Fi signal is named as the last 8 characters of the invert-
er's serial number.). Check the PV Master App "Param" to make sure that the battery type is the
same as was installed. Also check that the "Safety Country" setting is correct. If it is not correct,
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please set is correctly in "Set" .
① Power LED
② Energy consumption LED
③ Communications LED
④ Reset switch
⑤ USB Port
For compatible lithium batteries, the BMS status will display "Normal" after selecting the correct
Note:
battery company.
Grid
House
Loads
Figure 4.2-3 Figure 4.2-4
Param
Battery (Battery-Box H 11.5)
Battery Status SOC: 79%, Discharge
Battery Data 479.9V / 0.0A / 0.08kW
BMS Status Normal
SOH (From BMS) 100.0%
Protocol Code 256
Charge Current Limit (From BMS) 20.0A
Discharge Current Limit (From BMS) 25.0A
Waring (From BMS) Normal
Temperature (From BMS) 24.6℃
Inverter
SN 93648ENU172W0003
Firmware Version 02024
Safety Country Brazil
Work Status Normal (Backup)
Error
Overview Param Set
Problems During Operation
ET does not start up with battery only
Solution:
Make sure that the battery voltage is greater than 180V. Otherwise, the battery cannot start the ET.
ET did not start up with PV only
Solution：
1. Make sure the PV voltage is greater than 180 (230 V is needed to enter on-grid mode).
2. Make sure that, for the connection between the ET and PV panels, the polarities are (+/-) not
reversed.
The ET hybrid inverter does not discharge or output without the PV or when the PV
power is less than the load power
Solution:
1. Check whether the communications between the ET and Smart Meter are OK.
2. Make sure the load power is greater than 150W.
a. The battery will not discharge continuously unless the load power is greater than 150W.
b. If the battery does not discharge when the Meter power is greater than 150W, please check the
Smart Meter & CT connections and directions.
3. Make sure the SOC (State of discharge) is greater than 1-DOD (Depth of discharge). Or, if the
battery is discharged to below 1-DOD, the battery will only discharge again when SOC is charged
to （20%+1-DOD/2 (if battery discharge is needed immediately, the user should restart the
battery).
4. Check on the APP whether the charge time has already been set because during the charge time,
the battery will not discharge (battery will charge in priority during times of concurrent charge/-
discharge).
The battery does not charge when the PV power is greater than the load power
Solution：
1. Check the discharge time setting on the APP.
2. Check if the battery is fully charged and also if the battery voltage reaches the "charge voltage".
High power fluctuations during battery charge or discharge
Solution：
1.Check if there are fluctuations in load power.
2.Check if there are fluctuations in PV power.
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