Well I did not check the Unisolar output yesterday at the end of the day or reset the amp hour meter. Today we had clouds until early afternoon but good sun after. I Had a little surprise when I read the meter at the camper this evening.
I turned off the extra loads in the TT two days ago but left it hooked up so the parasitics could draw it down. I thought they might take the old group 27 battery down to 10.5 v but when I read the meter the minimum voltage had dropped to 10.24 v pre dawn on day 1. When i took a reading a few minutes ago the system was up to 12.4 v after 2 days of charging and then resting for a few hours after sunset this evening.
My peak amps on the flat Unisolar were an all time high due to the strip driving into a more discharged battery - 3.68 A within a day or two of the solstice solar minimum, with a theoretical Isc or 4.0 A.How does that even happen?
Watts peaked out at 51.1 W against a theoretical peak of 68, and 68 watt output on this unit is way up at a voltage of 16.5. V. I do not have the charts right in front of me on what the theoretical peak watts should be at 12.4 (I am sure it was higher in the sun, but under 14 v for sure), but 51.1 is a very high percentage of max output at 14 v and an even higher percentage if it was achieved at a lower voltage.
Total watt hours produced over the two days were 471.1, W and total amp hours were 37.327. These seem like very high numbers to me, especially for two days, neither of which were full sun, though the cloud cover was only light to medium.
Jim
