KKELLER14K wrote:
The advantage is that if you don't have solar your battery will charge while you drive, but not a very reliable source as your alternator is not going to keep up in most cases.
What makes you think that? It was true in the 60's, 70's and 80's, but not anymore. The 55-65A alternator with pathetic idle output found in that era turned out to be insufficient as EFI with electric fuel pumps became the norm.
As of the 90's, all three switched to 100+A rated alternators. They also pumped up the idle current rating. My truck has a 135A alternator that pumps out 90A at idle. Gone are the days of dim headlights when idling with the heater on high.
I certainly won't bash solar - good for those of you that went that route. I put $150 into having a 4 gauge wire from the alternator to the camper batteries and it works well
when driving every few days. It's a cheap alternative to solar with almost as good results.