Tweet
Hi guys, I recently installed my own solar system and went to turn it on and got an alarm from my inverter. The inverter is a Huawei SUN2000-10KTL-USL0 with the SUN2000-375 optimizers, and there are 30 panels, in 3 strings of 10, which are Canadian Solar bi-facial 385w. All components are new. Flipped the AC switch on the inverter for the first time on Monday and connected the inverter to the FusionHome app, however upon start up it throws an error message which is as follows:
Alarm ID: 2080
Alarm Name: Abnormal PV module configuration
Cause ID = 3
Per the manual
Cause ID = 1–4PV module configuration does not meet requirements, or the PV module output is reversely connected or short-circuited.
Suggestion: Check whether the total number of PV modules, number of PV modules in a string, and number of PV strings meet requirements and whether the PV module output is reversely connected.
ID1: The total number of PV modules is greater than 75.
ID2: The number of PV modules in a string is greater than 25.
ID3: The number of PV modules in a string is less than 6.
ID4: The total number of PV strings is greater than 2(3.8 kW/5 kW/7.6 kW) or 3 (9 kW/10 kW/11.4 kW).
ID5: The total output of PV modules is reversely connected or short-circuited
I've measured the output of each string and it is ~.8v across the string, or 1.75v from positive to ground. The system is NEC 2017 and my distributor says that it's a good thing that the voltage is low because that means the optimizers are waiting for a signal which the inverter isn't generating because of the error. I've connected each string up individually and the inverter still won't start because of that error.
The latest test I did was check the resistance. I get roughly .6 megaohm resistance across positive to negative on each string wiring, but I get 3.3 megaohm on PV1+ to PV2- or PV3- and PV2+ to PV1- or PV3- and same for PV 3. Wouldn't you expect to get infinite resistance from string PV1+ to PV2-?
If this is the case how would you go about diagnosing whether or not a string is connected in reverse or shorted and which string is causing the issue? Bonus points if you don't have to pull the panels off the roof to do it...
Alarm ID: 2080
Alarm Name: Abnormal PV module configuration
Cause ID = 3
Per the manual
Cause ID = 1–4PV module configuration does not meet requirements, or the PV module output is reversely connected or short-circuited.
Suggestion: Check whether the total number of PV modules, number of PV modules in a string, and number of PV strings meet requirements and whether the PV module output is reversely connected.
ID1: The total number of PV modules is greater than 75.
ID2: The number of PV modules in a string is greater than 25.
ID3: The number of PV modules in a string is less than 6.
ID4: The total number of PV strings is greater than 2(3.8 kW/5 kW/7.6 kW) or 3 (9 kW/10 kW/11.4 kW).
ID5: The total output of PV modules is reversely connected or short-circuited
I've measured the output of each string and it is ~.8v across the string, or 1.75v from positive to ground. The system is NEC 2017 and my distributor says that it's a good thing that the voltage is low because that means the optimizers are waiting for a signal which the inverter isn't generating because of the error. I've connected each string up individually and the inverter still won't start because of that error.
The latest test I did was check the resistance. I get roughly .6 megaohm resistance across positive to negative on each string wiring, but I get 3.3 megaohm on PV1+ to PV2- or PV3- and PV2+ to PV1- or PV3- and same for PV 3. Wouldn't you expect to get infinite resistance from string PV1+ to PV2-?
If this is the case how would you go about diagnosing whether or not a string is connected in reverse or shorted and which string is causing the issue? Bonus points if you don't have to pull the panels off the roof to do it...
Comment