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Old 04-20-2019, 05:11 PM   #1
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External Surge Guard and/or EMS needed if rig has an EMS built in?

Curious what all your thoughts are about needing an external Surge guard and/or EMS if our 5th wheel has an EMS built in from the Factory. Rig is a 2018 Cardinal 3525SOX. Thanks in advance!
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Old 04-20-2019, 05:14 PM   #2
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Not if it's a real EMS. Do you have a name and model #?

FYI Surge Guard is a registered brand name. Not the name of a device.
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Old 04-20-2019, 09:04 PM   #3
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Yes sorry - surge protector is what I meant. Anyhow the rig has the precision circuits 50a EMS system and it also has the Xantrex inverter. I read up on it and it doesnít mention surge protection so likely doesnít have it.
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Old 04-20-2019, 09:22 PM   #4
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Yes sorry - surge protector is what I meant. Anyhow the rig has the precision circuits 50a EMS system and it also has the Xantrex inverter. I read up on it and it doesnít mention surge protection so likely doesnít have it.
If it's EMS it has surge protection.
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Old 04-20-2019, 09:27 PM   #5
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Yes sorry - surge protector is what I meant. Anyhow the rig has the precision circuits 50a EMS system and it also has the Xantrex inverter. I read up on it and it doesnít mention surge protection so likely doesnít have it.
The EMS systems that I have seen all included surge. What is the brand that is in your RV?
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Old 04-20-2019, 09:38 PM   #6
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The EMS systems that I have seen all included surge. What is the brand that is in your RV?
OP said Precision Circuits. First I have heard of that one. Gotta read up on that one.
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Old 04-20-2019, 09:52 PM   #7
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Yes sorry - surge protector is what I meant. Anyhow the rig has the precision circuits 50a EMS system and it also has the Xantrex inverter. I read up on it and it doesn’t mention surge protection so likely doesn’t have it.
can you take a picture of that system. I went to the web site. It appears to be a controller of some kind and not an EMS protection product as we know it.
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Old 04-20-2019, 10:44 PM   #8
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I don't think the Precision Circuits unit is a EMS, but a power monitoring system. I took a quick look at their website and it does not appear to be the same thing. I may be wrong, but I'm thinking he still needs something like the Progressive Dynamics units. If it's not a full EMS, I would add a PD hardwired 50amp unit.
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Old 04-20-2019, 10:58 PM   #9
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I don't think the Precision Circuits unit is a EMS, but a power monitoring system. I took a quick look at their website and it does not appear to be the same thing. I may be wrong, but I'm thinking he still needs something like the Progressive Dynamics units. If it's not a full EMS, I would add a PD hardwired 50amp unit.
Exactly. One I looked at was a load sheading monitor. I don't know of any
Rv that comes with a factory ems or surge protector system. I have heard others think they had one but no one has confirmed. It's all been "I think"
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Old 04-21-2019, 06:14 PM   #10
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I have camped for over 50 years . And have never used serge protection. And have never had any damage to any TT . Sometimes I think people over think a lot of things. But if they want to waste their money , itís their money not mine. Most of the serge protection will only work up to a limited voltage . I have seen lightning take out the whole system serge protection and all.
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