I would see the value for something in keeping the A/C going at a reasonable power without tapping the battery when you have to leave the car out in the sun. Al

I would see the value for something in keeping the A/C going at a reasonable power without tapping the battery when you have to leave the car out in the sun. Also if you commute and can get a "free" recharge every sunny day. Assuming you take a long trip where you average 80Km/h you still get over 100Km of extra range which is not bad.