I do not have one of those surge protectors but I think they only protect you from SKIES and SURGES. When they read the AC VOTAGES levels and when they are OUTSIDE the designed safe zone limits they DO NOT fix the situation but probably alarms of the out of safe zone levels. I would hope they would switch your trailer OFF LINE. You end up with NO POWER feeding the trailer...
The only device I know of that would fix the problem is an AUTOTRANSFORMER sometimes called AUTOFORMERs. These units measures the low or high 120VAC levels and keeps them inside the safe zone for you to safely use... These units however have a out of limit range of around 10% I think I have read so the bottom line is you still may be without any power feeding your trailer...
In these situations your best fix is to have alternate means of proving power to your trailer or appliances to use... Never plug-in to something that is not within the safe zone levels... Replacing those high dollar appliances is not my cup of tea for sure...
The SURGE PROTECTOR is not a fix-all for all situations...
Just my thoughts here...
Roy Ken
