Tom_M wrote:
As long as the specs are similar, any panel will work. I doubt that the existing wiring would work well for 400 watts so you will probably have to upgrade to heavier wire. One option that you might want to consider is to go portable. Here's a portable 200 watt setup that I saw a fellow camper using which is available on Amazon:
Dokio 200 watt portable $249.99
With the addition of a 100 watt panel on the roof and the portable would give you a total of 400 watts.
With each such purchase I read the reviews and question.
There is review for above panel by dober-man and he says is is getting 6 amp in full AZ sun with one time record of 8 amp.
Another buyer reported 2.8 amp
Bit disappointing for 200W.
Wonder if dober-man is a member here?