Go Back   iRV2 Forums > MOTORHOME FORUMS > MH-General Discussions & Problems
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 06-05-2015, 08:09 AM   #15
Senior Member
Join Date: Feb 2010
Posts: 4,281
Autoformers do not steal power...they consume it.

They are nothing new but in short just a ferro-resonant transformer that operates in saturation mode to regulate the output voltage.

This prevents sags and surges from getting through to a limit of the design so some mov devices on fused side of input give great protection.

But they will increase the consumtion of power to keep it saturated so in a metered site you will pay more to have it in place.

Tony & Lori
1989 Country Coach Savannah SE
TQ60 is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 06-05-2015, 11:57 AM   #16
Senior Member
flynnwalter's Avatar
Join Date: Nov 2010
Location: Lake City, Florida
Posts: 446
If I somehow conveyed that an autoformer was something new, I did not intend to do so.
Steal was a term I chose (since that was what was related to me) to convey the opinion that somehow using an autoformer would take up extra electricity and leave others downline from us drawing the short straw. We were at the end of that 30 amp line or branch, so no one would 'suffer' from our use of an autoformer. If you are claiming the use of a Hughes autoformer actually does use more electricity, could you estimate how much? The autoformer only turns itself on during those times when the voltage drops to a preset, and turns back off (on standby) and would not be using much more juice than to power the tiny yellow light which turns to red when the autoformer is operating. Perhaps my understanding is all wrong and you could explain in layman's term just how it works as well as how it does or does not use additional electricity. Thanks

Frank W. '09 Cayman 38 SBD '08 CRV
Lake City, Florida
flynnwalter is offline   Reply With Quote
Old 06-05-2015, 12:00 PM   #17
Senior Member
bamaboy473's Avatar

Join Date: Jun 2014
Location: Gulf Coast, Alabama
Posts: 1,674
Originally Posted by flynnwalter View Post
I had some discussions with a pleasant lady at Hughes who advised there were often problems with Hughes Autoformers being sold on Ebay. They did not work and Hughes won't fix them unless you are the original owner.
I sent a message to Hughes about the subject and here's their response:

* What is the warranty on your units, and are they repairable if needed?

All our units come with a 2 year warranty from the date of purchase.

* If I buy an auto-former from a store that's not an authorized dealer of yours, will the unit be under warranty anyway?

Yes. if you would like it repaired, send it to Hughes Autoformers, 5558 E. La Palma Ave. Anaheim, CA 92807
Please add as much information that you can as far as why it's not working.

* If I buy a used unit, can I get you to repair it if needed?

We will inspect the unit, to see if it is repairable, and if it is we will let you know cost of the repairs plus shipping cost.


Alex Moreno, Sales Manager
Rick and Sandy
2003 American Eagle, 46K miles
...from Sept 2015
bamaboy473 is offline   Reply With Quote
Old 06-05-2015, 01:22 PM   #18
Senior Member
flynnwalter's Avatar
Join Date: Nov 2010
Location: Lake City, Florida
Posts: 446
As often seems the case, I did not make myself very clear. Hughes was being asked to fix non-working autoformers purchased cheap on Ebay for free under their warranty. I assume there must have been a number of them as the lady who answered the phone at Hughes felt I should be warned. I did not mean to suggest that Hughes would not fix their products. Sorry to confuse things, and thanks for pointing that out.
Frank W. '09 Cayman 38 SBD '08 CRV
Lake City, Florida
flynnwalter is offline   Reply With Quote
Old 06-05-2015, 01:23 PM   #19
Senior Member
bailiff's Avatar
Join Date: May 2013
Posts: 381
A few years back, we were in a campground in upstate Pennsylvania just a stop on our way to Niagara Falls. The next morning, everyone in our row of campsites had lost one or more of their major appliances from TVs to Microwaves, except us. I was using a cheap 30 amp progressive SSP-30, about $80, and had no damage
bailiff is offline   Reply With Quote
Old 06-05-2015, 05:54 PM   #20
Senior Member
Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 21,176
1Q. joule ratings vary (from 1250 to 4200, from what I've seen). Is there some point where it becomes overkill?

1A More Jouls are better, I suspect there is a point of dimishing returns but I do not know what it is.

2Q. would it be better protection to have two of the 1250 protectors instead of one 2500 rating?

2A: I do not think so no. (and this is my field)

3Q. Besides portability, is there any advantage to the portable ones?

3A: Ease of replacement if it fails. but basically.. NO.

4Q. The cheap ones seen to tell us that things are OK or not, but you still get power. The more expensive ones seem to turn everything off if they sense a problem. Is this right? Does anybody with one of them wish they had the other?

4A: Well,, I suspect there are some who have the cheaper 3 (or 4 or 5) Led models who WISH they had invested in the LCD models,, But I have never met one.. And for sure never the other way. I have both.
Home is where I park it!
wa8yxm is offline   Reply With Quote
Old 06-05-2015, 06:02 PM   #21
Senior Member
vsheetz's Avatar

Fleetwood Owners Club
Ford Super Duty Owner
Join Date: Jun 2012
Location: SoCal
Posts: 8,415
My suggestion is don't overthink this. Just get the progressive EMS and you are good to go.
Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.
vsheetz is offline   Reply With Quote
Old 06-14-2015, 08:10 AM   #22
Senior Member
Monaco Owners Club
Join Date: Apr 2015
Posts: 118
Lesson learned at the local KOA campground with our first ever trip for our coach. Plugged into 50 amp shore power. AC units ran for 2 minutes then stopped, couldn't get them to come back on. Took the coach to rv shop and luckily they found no problems and the ac units are working fine.

I just purchased this EMS-HW50C Electrical Management System - Hardwire 50A w Digital Remote Display and will install myself. This is more than just a surge protector...it monitors and will shed loads. Purchased this from Tweetys rv store.

Don't plug in shore power without some kind of protection !!


Chuck and Robbin Harrison....plus 2 PB and a G Pyrenees Max,Zenie and Smokie ! 1998 38' Monaco Dynasty Duke with a 8.3 Cummins. Everyday truck is a 2010 F150 XLT 4x4 and 2016 Ford Escape. TOAD is 2004 VW Bug Conv.
Migkiller is offline   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Surge protectors DebbieMH Entegra Owner's Forum 26 08-14-2015 03:46 PM
Plug for TRC surge protectors n5pht MH-General Discussions & Problems 8 05-28-2014 07:22 PM
Surge protectors doodah Class A Motorhome Discussions 30 03-06-2014 06:49 PM
Surge protectors boogerman MH-General Discussions & Problems 28 01-24-2014 11:20 AM

» Virginia Campgrounds

Reviews provided by

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 02:01 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.