While on this thread, does anyone know what Beaver provided to support the residential refrig option? Extra coach batteries (4 x 6v were standard) Addl inverter? Our coach, a 2005 Pat Thunder Lexington (40' w/ tag{the Sports car model} has a build sheet that includes the res refer, but it was equipped with the Norcold. Wondering where the extra batteries would go? 2 might fit next to the coach batteries, but then you would have to find room for the two chassis batteries. Wondering still.....