A little good and bad news on the Camry.
Bad: Shortly after buying the car, the 12v battery would die if not driven for a couple days and temps were low. Spring arrived, battery was fine in the higher temps, and I forgot about the issue. Fast forward to last week and I find the battery dead after not driving for a couple days and temps in the teens. Replaced it with an Optima Yellow Top. Those things have gotten spendy. I put one in the Prius 3 years ago for $150, that size is now about $240.
Now for the good. I got a grill block installed. The plastic insert in the bottom opening was pushed back a bit, so I managed to jam the coroplast between it and the bumper cover. I blocked 75% of the top from the inside. The radiator for the inverter takes up the top 25-30% of the area in front of the ICE's radiator; I wanted to make sure it would still get some airflow until I can see how it handles it before blocking the rest.