Hi I have a Kodak King with pv145V max and operating 60-115v . 8x Canadian 330w in 4 strings of 2. Canadian specs are 1, open circuit voltage 45,6v 2. operating voltage 37.2v.  On icc I am getting avg 80v dropping lower when there is a high power demand.  I decided to add one more panel and change the strings to 3 of 3 . No on icc I get between 120v-130v on pv  dropping with higher demand. My question what is best leave as is or add 1 more panel and go back to strings of 2. 

Thanks

I also have a 150pv max inverter.

Running 3 x 335w Ja solar in series.

I have 3 panels in series and 3 strings in parallel.