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Old 01-09-2008, 07:07 AM   #1
Senior Member
Join Date: Feb 2007
Location: Ontario
Posts: 130
SUN #187

ok, i am not sure what i should be doing ---- i have read bits here and there that indicate that an autoformer is a good way of ensuring enough power for air conditioning and other equipment and to hopefully prevent damage.

i am thinking of getting one - but not sure if i am buying into something that i really don't need or not?

I know it would be a good idea to get some surge protection and the autoformer will do this --- but so will a surge protector.

what do people have and why?
what would you recommend?

i don't want to sound cheap, but autoformers and surge protection is expensive (but cheaper than replacing the air conditioner/electronics).


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Old 01-09-2008, 05:59 PM   #2
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Join Date: Nov 2006
Location: New York
Posts: 1,910
SUN #98
PTHutch is an unknown quantity at this point
I use a portable 30 amp surge protector that looks like this:

I got it at Camping World

I also use an inexpensive volt meter, which looks like this:

Also from Camping World

The surge protector is more to protect the trailer from surges & lightning.
I use the volt meter to assure the voltage is sufficient to operate the A/C.
Rule of thumb I use is to make sure voltage is above 104V before I operate the A/C. Below that you're at risk. Below 100V you're in danger blowing the motor in your A/C.

I also use a circuit tester before plugging in the trailer to assure the campground's shore power is wired up correctly.
Here's what the circuit test looks like:

You can pick one up at most hardware stores.

This is what we do.
IMO the autoformer sounds nice, but it's way too pricy for me.
I don't know anyone that has one. So I can't provide any comments on them.

Hope this helps.
Mary & Tom (aka Hutch)
2015 Jayco Eagle Premier 361REQS
2014 GMC Sierra 3500HD 4x4 CC D/A
Sunlines: 2005 Solaris T-280SR; 1999 Solaris T-2670; 1998 Saturn T-24A
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