Irony

[Coffee_Slurry]

The size of the battery is specified based on the parasitic loads of the car when off, like the RF transmitter, etc, etc.

That's surprising. A car battery is what, 50Ah? I'll measure the parasitic load (off charger) of a Leaf on Pending date.

The service manual spec for "dark current" is 50mA or less.
No mention of how much the solar cell produces.

 

[TimeHorse]

You guys are all nuts! What the heck does a car need a 12V battery for anyway? It ain't nothing this baby can't do: