I've got 2 panels mounted on my Escape
19 and almost always camp in the sun if we are boon-docking. The trailer is pretty well insulated and I roll the awning
out if I want shade. Since most other campers want shade I can almost always get a sunny spot to camp. Even a little shade takes away a lot of solar
charging power. For example, about 2" x 12" of shade on the edge of one of my panels from the Maxi-Fan will cut the panel output by 75%. I've since taken care of that by raising my panels. My 95 watt panels put out around 6 amps each in full sun and an overcast day I will sometimes see 1.5 amps or less. If you have solar
you want sun. If you have portable panels you can park your trailer in the shade and move your panels into full sunlight...the best option for some. Most solar
chargers have a display panel showing charging amps and battery
voltage so you don't need any of those aftermarket meters. I bought one and never use it.