I hope everyone is doing well and catching some of that low December sun on their panels. The good news for folks in the northern hemisphere is solar harvest will start going up again. Those starving battery banks will start getting some relief. :-)

When I built the rig in 2017 I estimated my power requirements then used insolation models like PVwatts to figure out what it would take to meet them year 'round. In practice this meant sizing the array for Decemper in my wintering spots. It’s worked surprisingly well. Just enough power in deep winter and power to waste the rest of the year.