I use a Franks Autotransformer for surge protection and voltage stabilization boosting.
See my review in the product review forum. Love it after all these years.
The 50 amp unit is just a bit bigger as both legs are boosted and protected.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW