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Old 11-01-2019, 01:28 PM   #15
Beau388
Senior Member
 
Brand: Thor Motor Coach
Model: Hurricane 31S
State: Texas
Posts: 4,157
THOR #6411
Quote:
Originally Posted by cavie View Post
To my knowledge no RV's come with an EMS installed. There is a company using the letters EMS but they are installing a load sheading system. Complete different thing. There are 3 things on the market as far as protection goes.

Surge protector. It is just that protecs for high electric surge and nothing more. It is a one hit wonder. It works one time and self distructs.

EMS. protects from high and low voltage. Will nor let voltage thru if the source is not correct.

Hughes Autotrans boost low voltage 10%

Hughes auto trans in front of EMS is the best protection.
The Surge Guard ATS model 40450 is installed on Thor MC's high end diesel coaches, all Entegra diesels and high end Newmar diesels. <https://rvpower.southwire.com/products/transfer-switches/surge-guard-50a-rvc-automatic-transfer-switch-model-40450/>. It has all the EMS functions except for load shedding. The reason this ATS is used is it is RVC compatible for remote monitoring allowing better management of shore power and generator power. While it cannot automatically boost voltage 10% like the Hughes, SG 40450 does so much more than a typical EMS plus ATS combination.
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Jim & Roy Davis
2016 Hurricane 31S
1961 Rampside in tow
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