Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×

Thread Tools Display Modes
Old 09-29-2016, 10:08 PM   #21
Senior Member
Join Date: Jun 2015
Location: payson, az
Posts: 3,056
installation before the transfer switch protects the transfer switch. normally the higher end generators (inverter type) have electronic controls in them that provide power within specs. I have my ems before the generator. the advantage I could see for putting it after the generator is that you could monitor the actual load the generator was supplying. as far as installing it yourself, that kind of depends on you. there is absolutely nothing complicated about installing it. but you do need some cable (you might be able to cut it off your incoming power cord) and you need access to where you are going to install it. if you can cut and strip wires and can read the instructions you can do it. again nothing complicated, just read the instructions, plan it out, and then take you time and be careful. it's up to you and how confident you feel.
2015 cardinal model 3825fl
2015 dodge ram 3500 dually
CHICKDOE is offline   Reply With Quote
Old 09-29-2016, 10:47 PM   #22
Always Learning
ependydad's Avatar
Join Date: Nov 2011
Location: Four Corners, FL
Posts: 20,687
Here it is, from No Shock Zone:
Generator Ground-Neutral Bonding | No~Shock~Zone
2018 Ram 3500 DRW/crew cab/long bed/4x4/4.10 gears pulling a 2017 Spartan 1245 by Prime Time
Checkout my site for RVing tips, tricks, and info | Was a Fulltime Family for 5 years, now we're settlin' down for a spell
ependydad is offline   Reply With Quote
Old 09-30-2016, 01:55 AM   #23
Senior Member
Witch Doctor's Avatar
Join Date: Feb 2012
Location: Clarksville Va.
Posts: 10,364
Originally Posted by RamblerGuy View Post
The difference of opinion of the Progressive Industries EMS "Won't Work with Generators" may be because some are talking about a portable generator supplying a trailer and others are talking about an on-board generator that supplies a motorhome through a transfer switch.

The on-board Onan generator on our Sunseeker 3100 supplies power just fine through the factory automatic transfer switch, then through a hard-wired PI EMS-30C.
Bingo, Looks like you hit the nail on the head... I don't know of anybody but saying that there maybe someone who installed a ATS when they use a portable generator. I guess the best is just call the Manufacturer of the onboard generator and ask if has a bonded neutral. It seems to me that two members say they have no problem with it wired that way. I can see a Honda or something not working but I would think (and that is dangerous) that an on board generator would come bonded.
Coachmen M/H
2018 / 300 DSC

Witch Doctor is online now   Reply With Quote
Old 09-30-2016, 03:42 AM   #24
Senior Member
Witch Doctor's Avatar
Join Date: Feb 2012
Location: Clarksville Va.
Posts: 10,364
I have looked up the installation instructions, that PI claims and states there hard wire system can be wired in after the ATS as the OP asked. Please see the attached:...
Attached Files
File Type: pdf After ATS PI.pdf (385.9 KB, 18 views)
Coachmen M/H
2018 / 300 DSC

Witch Doctor is online now   Reply With Quote
Old 09-30-2016, 05:27 AM   #25
Citrus County, Fl.
GL1800Rider's Avatar
Join Date: Apr 2014
Location: Hernando, Fl
Posts: 2,313
This is exactly how mine is wired. I am still not clear what is meant by "won't work". Most of the time when traveling, unless it is a short run, we have the generator on so we can use the air conditioning and keep the coach cool. Many trips it is running for 6-7 hours at a time and we have never had any issues.

The only suggestions I would have are to: 1) periodically (I do it every six months) pull the cover off the transfer switch and make sure the lugs are tight so there are no loose connections and 2) If all of your electronics are under the bed, like ours is, would be to install a smoke alarm with a 10 year lithium battery in case there ever is a short under there.

The only difference I have seen is instead of 60 cycles it is sometimes 61. The incoming voltage is usually better than most RV parks shore power.
2016 Forester 3011DS
2017 Toyota Corolla SE toad
PREVIOUS: 2015 Flagstaff 832IKBS
99 Terry 31G
GL1800Rider is offline   Reply With Quote
Old 09-30-2016, 07:48 AM   #26
Full-time 5'er
mnolasco's Avatar
Join Date: Jul 2016
Location: Crestview, FL.
Posts: 60
Great comments. This has been helpful. I called both Forest River and PI. Turns out the onboard ONAN generator on my 2016 XLR THUNDERBOLT is neutral grounded. PI said they put the "after ATS" instructions in their install guide for customers who are viabke for that option. The tech at PI also recommended installing the EMS before the ATS to avoid damage to ATS in the event of a REALLY BIG surge.
I am installing myself. I had to buy 8' of 8 gauge 4 conductor cable. Im removing existing cable from wall socket (shore power) and running that to OUTPUT of EMS. Im running new cable from wall socket to INPUT of EMS. This is what PI suggested to avoid cutting cable and messing around with ATS connections.
I will post reply when install is successfully completed.
mnolasco is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Featured Campgrounds

Reviews provided by


This website is not affiliated with or endorsed by Forest River, Inc. or any of its affiliates. This is an independent, unofficial site.

All times are GMT -5. The time now is 06:06 PM.