When You're Serious About Solar For Your Off Grid Home On Wheels...

The Colorado based owner of this once upon a time 1990 Chevrolet school bus was determined to create a vehicle to live in for extended periods of time off grid. It looks like he succeeded.
The fourteen German Sun brand 130 watt panels that are tilted manually, feed eighteen 105amphour Trojan batteries. All that combines with an Outback brand control system.
There's more about this bus here.
With solar, there's no such thing as overkill...