Nice discussion going on above between electronics/electrical tinkerers trying to protect their RV electricals from various surges and slumps - including the ultimate surge ... lightening.
Regarding protection of RV electricals from lightening, however, the DW floored me years ago with her ultra-off-the-wall-cheap K.I.S.S way to protect our RV's electricals when camping with electrical hookups and there is word of potentially any lightening in the vicinity of us ... she makes me disconnect the RV from shore power and go into drycamp mode. It takes a direct bolt hit to put things out of business, then. :B
FWIW, if we were full-timers I'd save up the shekels and do it right with just the right surge protection and a Hughes Autoformer - as talked about in this thread:
https://www.rv.net/forum/index.cfm/fuseaction/thread/tid/28543300.cfm
