Testing update

This is data we gathered last night from our "maiden voyage". We ran the cooler all night off of a 12 - volt car battery. We also a battery charger wired to the battery as to not completely kill the it off. The initial box temperature was at 66 degrees F. Our original set point for the interior box temperature was 35 degrees F. It hit that set point in 2 hours (15 degrees/hour). I then lowered the set point to 32 degrees F. It quickly brought the temperature down to 32 degrees F where it continued to maintain that temp throughout the night. The bumps in the graph above represent the point at which the box temp has it the set point. At that time the modules turn off. When the box temp again rises above the set point the modules kick on to bring it back down.

The next task is to determine how well it will function with only one module running rather than two. This is especially important because when the solar-panel is connected only one module will be running. We'll see.....