Thank you for the responses.
Lwiddis >>960 solar watts isn’t enough?
The panels are feeding a 200a, 24v Lipo4 bank and power the Norcold, a microwave, 2 laptops and 2 external monitors for about 12 hrs/day and occasionally the AC or elec. heater. On full sun days there is no problem with the load but on full cloudy days more capacity is needed. A 320w 24v panel is @ $200 so why not find a way to make it work... there's no more room on the roof.
BFL13 >>I had a panel on the C's roof up front just back from the front cap and almost lost it from wind effect while driving.
For 12 yrs the 3 12v panels flat roof mounted with Z brackets using 1 1/2" roofing screws had no problems. These new 24v panels are considerably larger and even with two mounted just back from the front edge they are fine.
rockylarson >> I would not go with a design that locked me into always parking in a particular direction to function.
The 3 flat roof mounted panels are going to do what they do regardless of orientation. If a nose mount would work for a 4th panel then pointing East, West and especially South would provide some extra advantage.... at least that's my thinking.
I spend May - Oct at 8,200' in the Rockies and have 360deg unobstructed horizon views so no issues there. The rest of the year is usually spent beaching on the Texas Coast which is why I want to squeeze more out of the low Winter sun.
pianotuna >> I would use the 4th panel as an awning.
An interesting solution worth considering however sudden wind gusts in the mountains can peak > 50 mph in the blink of an eye and that might be a problem.
