Measuring solar yield approaching winter solstice

Wow. Still learning but they seem really robust at making watts in less than ideal conditions. We clouded up late in the day so I did not go out to take a reading. I will see how many days it takes to recharge my poor test battery. I took it way down before I shut off the optional loads. It is now just one Unisolar vs a discharged and beat up SLI battery and some parasitic charges.