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Old 06-17-2015, 05:57 PM   #1
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Digital AC Monitor

An idea to keep an eye on your system AC Voltage.

Terry & Bev:
2004 Winnebago Sightseer 35N - Workhorse Chassis - Toad 2008 Ford TaurusX -
FMCA 261771 - USAF 1956/76 Retired.
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Old 06-17-2015, 06:00 PM   #2
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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.
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Old 06-17-2015, 06:08 PM   #3
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Too bad good governor went out of business.
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Old 06-17-2015, 06:16 PM   #4
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Progressive Dynamics EMS
1999 Newmar Mountain Aire MADP 4080, Cummins ISC 8.3L, Allison, Spartan MM IFS, Howard Power Center, Chev Trailblazer LTZ Towed w/ BlueOx rigging, Segway X2.
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Old 06-17-2015, 09:46 PM   #5
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The Progressive Industries EMS-HW50C (link here) provides AC input monitoring for over/under voltage, open ground, open neutral, frequency monitoring, plus surge protection. It has a remote display to show instantaneous voltages, amperages, and frequency. It is a permanent, hard wired installation. There is also a portable model, but does not have the remote display for easy monitoring inside the coach.

This model is for a 50Amp shore service. There is a 30Amp as well.

Highly recommended.

Hope this helps.

EDIT: I purchased one for my previous unit at RVUpGrades.com. Was best price at the time.
Towr: 2007 Country Coach Allure 470 - 37 Sunset Bay Cummins 400 ISL
Toad: 2016 F150 King Ranch - 3.5L EcoBoost 4x4 Supercrew (curb weight 4,775 lbs)
Toad: SOLD 2007 Jeep Grand Cherokee (yes, it has a Hemi) (curb weight 4,720 lbs)
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Old 06-17-2015, 11:15 PM   #6
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This is what I use:

1Pcs New AC 110 300V Blue LCD Digital Voltage Volt Meter US Style Plug Cheap Free Shipping-in Integrated Circuits from Electronic Components & Supplies on Aliexpress.com | Alibaba Group

And one of there:

2004 Monaco La Palma 36DBD, W22, 8.1, 7.1 MPG
2000 LEXUS RX300 FWD 22MPG 4020 LBS

Don't know where I'm going, spose I'll get there anyway.
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Old 06-18-2015, 09:35 AM   #7
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I have this one
Digital Line Monitor - TRC AECM20020-012 - Surge Protectors - Camping World

I leave it plugged into an outlet I can see from driver's seat. The frequency counter is great to monitor genny loads as you can see it slow down when overload happens. It will also sound alarm when voltage drops to 102 volts.
2015 Jayco Precept 35UN
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Old 06-18-2015, 11:16 AM   #8
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This is what I use.
Progressive Industries RV Surge and Electrical Protection industry lea

Protects all my stuff and no more worries. Very costly if your ac is incorrect. Ask me how I know !
Tom Lopez, USMC Retired
2004 Fleetwood Southwind 32VS
DeForest, WI
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Old 06-18-2015, 03:38 PM   #9
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Originally Posted by BrianGlenn View Post
Highly recommended.
I also highly recommend the Progressive Industries HW-50C. It offers great protection from a number of electrical issues, and is fully automatic. It not only displays power and current on both of the 50 amp hot leads, but unlike a simple plug-in meter, it keeps an eye on things even when you're not watching the meter. (And remember, if you have a 50 amp coach, you have two hot leads, so you would really need two meters, one on each leg. This is not an issue with the Progressive unit.)

Yes, it's quite expensive, but it can save you from some really damaging (and expensive) electrical problems.

Adam and Sue, and a pack of little furballs
2007 Holiday Rambler Endeavor 40PDQ Limited Edition - Cummins ISL 400
2013 Ford F-150 FX4 toad - USGear Unified Tow Brake, Roadmaster Blackhawk II Tow bar, Blue Ox baseplate
Home base near Buffalo NY, often on the road to a dog show
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