Another solar panel question

Thanks for the replies

25% or so was kind of what I was thinking. I can't lower mine and check because its mounted to the rear of the trailer and tilts up. Guess I could try raising it more but don't have the brackets to hold it there.

Anyhow, thanks again

Keith

As BF13 said lots of variables. I used 25% loss for flat panels.

Huge variation in results depending on location and time of year, orientation wrt South, and tilt angle wrt "optimum tilt" (see macslab site for that)

Much easier if you can just add some flat wattage and not have to fuss with tilting and orientation of rig wrt South.

Anyway, my measured results at 49.3N in May with 130w panel sunny all day: Flat 56AH, Tilted 70AH. (Panel rated 8.2a Isc) Flat 7.2a, Tilted 8.2a at high noon.

It is all proportional, so to get that same 70AH flat I would have needed 70/56 x 130 = 163w. So a 160w or a pair of 80s instead of the 130 would have done it----but only at that location at that time---so YMMV (a lot)

Why not lower your present panel and note the difference?