Doubtful that it is. Even if it is I am not a big fan of factory solar prewire. Depending on your design - Often not large enough, not enough pairs, not routed as desired, etc.
Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.