ctuna: got it!! I saw that link you posted, it didn't state any compatible models for 2011 models. Yes, it's on the more expensive side, but since I am not sure this will solve my problem and today is another gloomy day in Atlanta, I am not willing to purchase that for now. But I am open to buying one less than $100 to experiment on it. I need one that helps me maintain the battery.
The spot I park daily is always located by the side of the deck. So there's a little sunlight shining in. But if solar panel helps, I can get a pass to park it outside. I can't wait for spring to come!
2011 328i Convertible | Black Sapphire Metallic | Black Dakota Leather | Bamboo Anthracite Wood Trim| Sports | Premium | Comfort Access | Heated Seats | Navigation | Harmon Kardon | iPod/USB