Ozcan

Axpert inverters are sold under the brand name TWI in Turkey. My problem seems similar to those mentioned under this topic. The difference is, I've been experiencing this issue always around midday and not any other time of the day like some users. I am not monitoring this system 24/7, so may be this happens at other times as well and goes unnoticed. Every time this issue comes up is when the power demand from the solar panels is maximum and the inverter is supplying power from the batteries as well.

Hi all. I came across this forum while searching for info on this problem I'm having with my Axpert VM 5K inverter. I am glad to have found this great source of information, thanks to all the contributors. It seems what I am experiencing is a common problem, with minor differences. I don't know whether it will just add to the confusion, or shine some light on the problem, I thought I should share my experience. Here's my setup: - Axpert VM 5K inverter - 12 x 270W panels - 4 x BB BPS200-12 VRLA batteries Every time I've noticed this PV drop issue was around noon, when there was a high power demand from the panels. PV power drops to zero, the system runs on batteries for a while until the battery voltage drops and the system switches to line mode. This happened at least three times when I was near the inverter. I heard a short beep and when I checked, I saw that the PV power was zero. Sometimes this issue is self resolving, after about 30 seconds the PV power starts increasing slowly and in about 60 seconds everything is back to normal. However, in one case I noticed that the inverter did not recover and after some time the solid solar panel icon on the screen started blinking. I waited about a minute and after seeing no change I had to disconnect the solar panels to resolve the problem. When I first encountered this problem, my dealer suggested it could be related to panel Voc and the changed the configuration from 4 x 3 to 6 x 2 but this didn't help. Some people have suggested this might be related to Huawei batteries, but my experience suggests otherwise. Cheers, Özcan