The Silverback 29RE does not have space for four 6 volt batteries. The dealer installed two 12 volt batteries, but did not wire them correctly. I didn't figure that out until I got it home. Several threads on here addressing that issue. I did add a third 12 volt of the exact same brand and size in parallel with the other two. The residential refer will run all day on the inverter with no issues. We are really happy with the residential refer.
2016 Ford F-350 Lariat CC, 4x4 SRW. B&W turnover with extender. 2015 CC Silverback 29RE, fitted with Reese Goose Box. Amateur Extra Class K5TS, 2016 nights camped 16