pianotuna wrote:
Does the PI ems solves the low voltage issue? Oh, no, it doesn't, it simply shuts down the power. Then it may as well be garbage in this particular instance.
SoundGuy wrote:
That's one of the dumbest statements I've ever read here on the forums. :S By shutting down power to the trailer when power falls outside of specified parameters it's doing exactly what it was designed to do ... AND doing exactly what the well informed consumer who bought one expects it to do. Good grief. :R
pianotuna wrote:
Since my personal comfort zone is 108 and not less that 107 volts both EMS "favorites" are from my point of view useless. The sellers "spin" them as surge protectors and, again, from my point view they don't do too well. If I had to choose one it would of course be the PI unit. But an autoformer, for me, is going to be far more useful especially since it will also buck voltage.
I've never come across high voltage. I've never come across incorrectly wired outlets. I have also not seen a bad neutral--but then the testing I do (under load) would catch that, too. Since I'm only 30 amps, the neutral may be less of an issue.
Again, incorrect statements. Yes, Progressive Industries advertises their SSP surge protector series as "surge protectors" because that's exactly what they are. However, that's
not what the OP has nor what we're talking about here ... rather, the OP has a Progressive EMS which the company advertises as
RV EMS with Surge Protection. Although initially confusing, what the OP was saying in his original post was that if anyone has any doubt about investing in an EMS here was an example of his own where his EMS saved the day by protecting his own rig from excessively low (and damaging) voltage.
Your choice obviously is to instead autoform incoming low voltage ... that's fine, but it doesn't invalidate the Progressive EMS approach of simply cutting off voltage to the trailer nor make it
"garbage to the OP" as you claimed. It simply makes it a different approach, one that thousands who have purchased an EMS are quite happy to have. And what in the world do you mean
"it doesn't do too well"? :h A Progressive EMS is designed to cut off voltage to the trailer when the low voltage threshold of 104 vac is crossed and keep it off until voltage within spec is restored ... and when it does restore voltage it does so with delay.
It does exactly what it's designed to do - perfectly. :B
As for campground source supply errors, yes I've never come across high voltage but I sure come across low voltage on a regular basis. I've not yet seen a mis-wired pedestal but I sure have had several open ground situations. Just because low voltage seems to be the only issue you run into that doesn't mean others don't see any of these other potential errors or that an EMS that will detect these errors and protect the trailer's electrical system by not passing power on to it isn't a valuable tool for others - it is, confirmed by the thousands and thousands of EMS units that have been sold and are out there protecting RV electrical systems every hour of every day. :B
