Alternator charging while at idle?
So my 2003 4runner would go through batteries once a year - dealer said that I dont drive enough (6 mile round trip commute to train station a day). I finally solved the problem by installing a solar panel that was a 2W trickle charger. Currently on same battery for 3 years. For the hell of it, I installed one on the FJ (sunsei is the company that makes it). But my question is, does the battery get charged while car is in idle? Dealer is telling me car has to be in motion - which makes very little sense. 5 speed vehicles, 45 mph is no more than idle in 5th gear.
Does the FJ have a better alternator than the 4runner (4th gen)? and does it charge battery at idle?
2008 FJ Crawler (ARB FJ Cruiser through DSI), 3 inch OME Lift, 305/65/17 Pro Comp Tires, ARB Black Bumper, Warn Winch, NUVI GPS, reverse cam
2010 Chevy Silverado Crew Cab LTZ 4x4
2008 C6 Z06 Corvette pushing 585 hp to wheels
2014 Cadillac Escalade ESV Platinum