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Old 07-15-2015, 12:04 PM   #11
Senior Member
Join Date: Jun 2009
Location: SW Oklahoma
Posts: 240
I had my dealer install my HW50 after the transfer switch. My thinking was it would protect everything from the input be it shore power or generator.

Low and behold my first time at an Air Force Base in Colorado and we get a couple of power surges (on/off/on/off) during a storm. Fried the transfer switch and the HW50. Nothing wrong with anything in the camper.

Purchased a new transfer switch and a new HW50 This time I installed it before the transfer switch. I don't use the generator but a few times a year. We don't dry camp, but I use it during shore power outages. Generator has built in protection (Onan 5500).

You can protect everything, but at what cost...

Just MHO


2014 Dynamax Trilogy 3850RL - South Hampton Interior, Full Body Paint (Black / Silver / White), MOR/ryde Independent Suspension, MOR/ryde Disc Brakes, ONAN 5500 Generator, Progressive Industries HW50C w/Dual Display, Winegard HD Dish w/DirecTV, Washer & Dryer, iSprings 7-stage Reverse Osmosis Water Filter, Trail-Air Flex Air Pin Box, Third AC installed, AC Voltage/Amp Meters, DC Amp Meter, Garnett See Level Tank Sensors, TST 507 TPMS
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Old 07-15-2015, 12:08 PM   #12
7 Year Class A RV'er
Join Date: Oct 2014
Location: Winter Park, FL
Posts: 1,061
All of them I've seen specifically tell you the install must be on the shore power side of the transfer switch and will not work otherwise. The generator should have its own protection hard wired into the controller on the generator.

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Old 07-15-2015, 12:49 PM   #13
Join Date: Oct 2012
Posts: 95
Originally Posted by John Hagen View Post
You can protect everything, but at what cost...
Each anomaly must be discussed separately - and with specification numbers. For example, those plug-in protectors are some of the most expensive. And do not claim to protect from typically destructive anomalies. Those are recommended when advertising, hearsay, and wild speculation replaces concepts taught in junior high school science.

A Progresssive is for anomalies often found in campgrounds. Word protector can describe 35 completely different and unrelated devices. That becomes obvious when every discussion includes plenty of numbers - no subjective conclusion. Often a best solution is also a least expensive one.

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