irfangul

Voc will not go over 90V because All the 4 panels are not connected in parallel, I have made 2 pairs of series so Voc is 90V for each pair then these pairs are connected in parallel which has not effect on voltage, This system was operational without any issue for one year. Any other idea ?

On my Inverter setting 05 (Battery type) is set to FLd (flooded) which means bulk charge is 29.2V , I will check any abnormality in it. Will check this out and get back to you. I am using Osaka Tubular 180Ah 12V Batteries 2 modules, check this out Battery link For this battery charging cut off when fully charged is around 14.4V to 14.6V . with two in series its exactly around 29.2 .

Just to give you more details, I am using 2 , 12v batteries connected in series, Assuming you are talking about overcharge protection that is 32 volt in my case with 24V system. Right now batteries are connected with another 24V modified sinewave inverter without solar capability, which I am using as a backup for lighting up my home. its working fine without any issue.

Yes, its connected to batteries, the Inverter doesn't start without batteries, How can I make sure its the same issue you are talking about? I am using tubular flooded batteries connected in series to make 24 volt.

@Coulomb I have checked the board myself it doesn't look like a year old board but more a month old. I am using 3kVA VM axpert model see specs in the link user manual of 3.2 kVA My personal guess is it has something to do with the solar charge controller, I am not sure about it. your are the expert here. looking for your guidance. I can give you more pics, may be a video of the board if you want.

Have a look at this also.

I am using Axpert VM 3.2 under brand name Inverex in Pakistan, it worked without any issue for the first year, I have four 330 watt Trina Tall solar panels connected pair of panels in series then these 2 pairs connected in parallel with inverter so it match the inverter specs. I had no issue for one year but one day I found out that 0 watts are coming out of solar so I reported the issue to the local company from where I bought it, they said inverter has some issue in its Solar Controller and repaired it. Then after 1 week of repair I felt burning smell coming out of inverter, the inverter was gone. I again took it to local company this time they replaced the whole board with new one but what a bad luck it blew again after 1 week, they repaired it again, and It blew again within a week. Long story short, now I am hopeless with this product and unable to understand what is wrong with my system, I had the whole systems inspected by a site engineer of the company but he couldn't find anything wrong with the setup. The latest images of burned inverter are attached, I can see burned MOSFET my idea is its Solar Charge Controller again. See if someone can help me here, i can give more details about the system, I am a software developer by profession so please consider me a noob here. Thanks