For about $152.00 you can buy a Ramsond 50W solar panel
on ebay delivery included. The panel has a 25 year warranty.
For another $25.00 you can buy a Ramsond controller.
I've had this set up on my trailer for over a year and it supplys all my electrical
needs including the furnace
all night when it's cold.
I have changed all of the interior lights
and the porch light
It even fully charged my battery
at Yellowstone last fall
in the campground with tall trees. I only had filtered sun.
The panel only weighs about 8 lbs. so if you don't mount it on your trailer it's still easy to handle.
I'm a Costco junky and this is better than anything I've seen there.
My first solar
panels were from Harbor Freight. I used them one time and sold them at a considerable loss at a yard sale. They were to heavy, bulky and took to long to set up.
For $249.00 you could get an 80W Ramsond panel and controller.