Please I need help on my Axpert inverter MKS 3KW 24V.

I have the following installed with it.

1. 6 X 320W Solar panels 

2. 4pcs 220ah luminous tubular batteries 2S2P connection

According to the battery capacity, I need about 10% of charge current to charge the batteries which is 40A. Now, the problem is anytime I change setting 02 above 20A, the inverter turns off and registers ID code 2004: LINE_FAIL  as can be seen on Watch Power

This only happen when charging the batteries using solar panels

Pls what could be wrong? 

Edited January 8, 20205 yr by JHenry

6 hours ago, JHenry said:

1. 6 X 320W Solar panels 

All I can think of is that your panels might be producing too much voltage for the Solar Charge Controller to cope with. What is the maximum open circuit panel voltage for your inverter (it depends if it is a PF1 or PF0.8 model, and whether it's a "plus" model), and what is your panel Voc?

I've not heard of ID codes, but then again I don't use WatchPower, and I'm more familiar with the larger power models. It's certainly a strange error.

Its the PF0.8 model. The max panel VOC at the time of tripping and registering the code was 125V. The mppt is said to handle up to 145v voc

Problem solved!

After several checks and test, I found out that the DC circuit breaker was the culprit. It is poorly rated! Chinese things!. So whenever I increase setting 02 above 20A, there serious resistance created which causes heating of the cable especially hotter at the point where the DC breaker was installed. Actually, the inverter was sensing overheat and hence shuts down when current to battery increase above 20A.

For confirmation, I did a bypass of the breaker and was able to increase 02 up to 60A with no trouble at all. I ve gotten my self a better DC breaker now.