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Old 10-20-2014, 10:26 AM   #1
2010 25' FB Flying Cloud
Danville , Pennsylvania
Join Date: Jun 2011
Posts: 12
Low voltage and surge protector

I would like to protect my 2010 Flying Cloud (30 amperes) from voltage extremes (both high and low) as well as surges. I thought of using the EMS-HW30C from Progressive Industries, however, that unit is to be permanently installed and I use twin Honda generators when commercial shore power is not available. These may be incompatible as the neutral and ground lines in the Hondas are not connected together, and the EMS-HW30C cuts the power when it detects a floating ground. Suggestions or recommendations?
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Old 10-20-2014, 10:53 AM   #2
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2012 Interstate Coach
From All Over , More Than Anywhere Else
Join Date: Dec 2011
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There is an external ground terminal on the generators (check the generator manual for details), but most people never use them, because it means driving a grounding rod into the soil and connecting the generator ground to it. Grounding the generator to earth should allow the Progressive unit to function properly when you're on generator power.
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Old 10-20-2014, 11:29 AM   #3
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2015 25' FB Eddie Bauer
2013 25' FB Eddie Bauer
2012 20' Flying Cloud
Small Town , *** Big Sky Country ***Western Montana
Join Date: Feb 2010
Posts: 2,665
We use a line protector when plugged in at a CG ... always. But a line tester will show a reverse fault when we use our Honda gens - not a problem, however.
2015 25' Eddie Bauer Int. / 2020 Ford Expedition 3.5 eco B
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Old 10-20-2014, 12:17 PM   #4
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2012 28' International
Issaquah , Washington
Join Date: Sep 2012
Posts: 773
I have the EMS HW 30. I've installed it before the transfer relay so that it protects the shore power input but not the generator input on the front of the trailer. That way when I use the generator the EMS doesn't prevent the connection. Works great.

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