I personally am used to the heat (grew up in SC), but the Insight mostly isn't. It did go through some 100+F days last summer and worked just fine -- though assist happy. It is good thinking, but any charge/assist cycling should show up on the display. I'm seeing similar sluggishness in my Insight but in that case I know it is charging because 1) my Calpod disabling switch gets me back to normal operation -- something I unfortunately didn't notice until right at the end of my trip home yesterday and 2) the car never reaches 20 bars no matter how much regen I use. I'm going to do a 12V pull to force a full recalibration event -- the computer seems to be confused. Speaking of which, Jeff -- does the car still perform better in the mornings when it is cooler? Mine does not so it makes sense to go after the computer -- how about you?