When not on the road,I park my RV in a RV storage faculty under a canapy with 50 amp power . I utilize my progressive surge suppressor . Lately, I noticed 3 times this past week that the clock on mic...
Be glad you have surge protection. You seen 133 but the inital surge may have been even higher. Voltages that high normally don't affect converters, inverters and resistance loads but are very bad for electronics like TV's, computers and some circuit boards. Most RVs in storage are probably ok because not much is energized.