I have a meeting cancel and was able to make a quick run out to measure the middle of the day numbers (half way between sunrise and sunset). 2.99 A, 12.37 v, 8.695 Ah.
I am very pleased!
It Does not look like nearly the drastic reduction of 60% of full output i had heard for being flat with low angle sun. I am getting 75% of the theoretical max amps the panel can do Isc, and an even bigger percentage of the peak 3.xx amps I have ever gotten aiming the PV right at the mid day sun.
This is still a newish flat panel so it may be putting out a little over spec, but I have had it in service since my first post about it.
I think the amorphous panels do get symmetrical input around solar noon rather than shifting the curve to tail off output earlier due to heat. If so that says I am getting almost 17.4 Ah in full sun, just days away from winter solstice.
Tried to keep it simple but efficient. The kicker for yield is getting over 10 hours of daylight this time of year. I have only a 15 foot 10 gauge run total from the Unisolar through the controller to the battery. Bizarre diagonal mounting position that eliminates all shading from anything on the RV. South-facing parking position that gets direct sun from as soon as the sun clears distant trees until when it sets behind other distant trees. Freshly cleaned PV. Cheapie LandStar 10A PWM controller, but it is serial PWM so in theory that is one of the better types for charging efficiently. And of course I am pulling down the battery bank enough the get good amps since I cannot harvest watts efficiently using MPPT.
Woot!!
Jim
