Querobin

You can't. The spores arrive by wind and if anyone on the island has it, chances are tomorrow you will too. In some parts of the world it gets so bad that people use pressure washers to wash it off the roofs. But for solar panels, I suppose you just wash it and live with it.

Hi I'm back,
 
I was able to replace the dc board and there are warnings flashing. Please see picture and I hope you can help me figure this out. The error is number 10 and 14.
Appreciate the hand.

send an email to Jack and ask if he could advise further
[email protected]

Sorry, seldom see my home before 10 at night. Was waiting for some settings to take affect on a cold room when i saw this post on my phone. Just arrived home,so i will try and answer quickly. 
I assume this unit was working and suddenly stopped working. 
Sadly most of them were sold with a faulty DC board. My first failures were exactly like your explanation. Ac brought them on, but dc not.
Have the DC board replaced. Please ask for a replacement board that was manufactured after FEB 2018. There is still some of the older boards floating around. Replacing with those will result in a failure in the future again. 
Good luck. 

@Jaco de Jongh knows these inverters a bit better. He's not very active here anymore but maybe he'll answer this one 🙂