UL vs non UL for off grid?
I've seen some web sites which appear as clearing houses for yester-year's panels. What I am wondering, are there reasons not to save a little money for a non-UL listed panel if it being used for off-grid, very specific purpose? The $$$ difference between two 130W panels is significant when going with a non UL product. I believe in "you get what you pay for", but what makes a non UL panel much more of a risk if it is being used, alone, for a limited purpose?