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AC V Outrange Troubleshooting Possible cause: The grid voltage is

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1. AC V Outrange Troubleshooting Possible cause The grid voltage is out of permitted range or the inverter s voltage limits is incorrect etc If there are several inverters in parallel and one or more inverters show AC V Outrange after the inverters feed electricity to grid for a while this might be caused by high impedance between the inverter and feed in point please record the AC cables wiring condition and record the phenomenon then contact Growatt service If the inverter shows AC V Outrange when turn on AC breaker check following the steps below a Turn off the AC breaker and DC switch check whether the AC cables are connected properly i T oy amp AS 20 Fig 1 AC cables wiring b Turn on AC breaker measure the voltage between L and N on the AC terminal block using a multi meter if value exceeds the permitted limitation of your local regulation please contact your local grid company to confirm the power quality of the grid c Turn on DC switch compare the grid voltage measured by multi meter and the AC voltage displayed on the inverter If the tolerance is more than 3V please calibrate the detected AC voltage of the inverter by following steps PV INVERTER Fig 2 AC voltage shown on inverter display lt Connect the inverter to PC via USB to RS232 cable lt Open the software ShineCHKVac to calibrate AC voltage as below picture lt Disconnect the AC breaker then type the whole n
2. example the switchboard the high impedance of the long wire may cause a voltage boost from inverter AC terminal to grid tied point switchboard In this case we can change the Vmax to a higher value for example 273v Please follow the below step to change Vmax to 273v if customers want to lt gt lt gt gt gt Connect the inverter to PC via USB to RS232 cable Run ShineTool software change the communication COM address choose option 4 Parameter set Choose 5 Vop High and fill in 273 Fill in password and click Set Red the Vop high value once finished Commissioning inverter End of the document
3. umber of the voltage value measured by multi meter For example if the multi meter measured grid voltage is 230 2V you can input 230 if the grid voltage is 230 6V you should input 231V Please make sure to input the right COM port number of your PC Fig 3 Vac calibration d Check the AC voltage limitation by ShineTool lt Change to the 3 Parameter Read tab type into the correct COMM port number and OPCode Growattset then click on the Read button a ShinelTool 3 Parameter Read 1 State Information ProductTest 3 Parameter Read 4 Parameter Set 5 yy Update p Fig 4 read Vac rang lt Check whether the limitation complied with local grid standard If not please reset the limits with Shine Tool Fill Corresponding value in Set value field then click on the Set button to set upper and lower limits of AC voltage one by one Example shown as below you can refer to the following table for the threshold value ShineTool 4 Parameter Set 1 State Information 2 Product Test 3 ParameterRead 4 Parameter Set 5 FW Update 4 Mop low 207 0 Fig 5 Set Vac range Table 1 Vac set values e Ifall conditions are OK and this fault still exists please contact Growatt service Additional information The standard Vmax value Vac high is 255v or 263v It is according to local grid company s requirement Sometimes the inverter is far away from the grid tied point

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