John,
I had 4 solar panels when I USED to point them. I then bought 2 more for a total of 6, they are all roof mounted. With our usage in the winter time, we found we don't have to point them, we have enough electricity stored for our needs when we conserve.
These are AM Solar panels.
On the other hand, in winter, if I tilt them toward the south, we get an increased amount of power which is very convenient having an abundance of needed electricity.
Like at Quartzsite, where I know we will be there for an extended period, I tilt them and leave them that way for the entire time.
BTW, it was Bill (crossthread) who had the Costco solar panels. He only used them to trickle charge his batteries.