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07-06-2022, 07:47 PM
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#1
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Junior Member
Join Date: Jul 2022
Posts: 4
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Power issues
I own a 2000 knight shouldn’t all the 110 plugs in the coach work when plugged into 50A shore power?? I’m in the process of changing inverter charger and noticed that a bunch of outlets don’t work with out the inverter hooked up!
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07-06-2022, 08:01 PM
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#2
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Community Administrator
Tiffin Owners Club
Join Date: Sep 2013
Location: DFW, Texas
Posts: 19,532
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First off, Welcome to IRV2!
Yes, all outlets should work on shore power. If the non-working outlets are on the inverter, check for pushbutton breakers on the inverter/charger. There should be a 120v pass through feature on the charger when you are on shore power but it's governed by the circuit breakers.
__________________
 2017 Phaeton 40IH XSH Maroon Coral - Power Glide Chassis with IFS
Previous '15 Tiffin Allegro RED 38QRA and '06 Itasca Sunrise 35A
'16 Jeep JKU Wrangler Sahara or '08 Honda Goldwing
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07-06-2022, 08:19 PM
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#3
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Junior Member
Join Date: Jul 2022
Posts: 4
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How’s it going so with the inverter out of the picture not hooked up shouldn’t the outlets all work?
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07-06-2022, 08:24 PM
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#4
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Moderator Emeritus
Ford Super Duty Owner
Join Date: Aug 2000
Location: Bryan, TX when not traveling.
Posts: 22,799
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You may not have all of the outlets connected to the inverter. How many Watts is the inverter rated for?
Ken
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Amateur Radio Operator (KE5DFR)|No Longer Full-Time! - 2023 Cougar 22MLS toted by 2022 F150, 3.5L EcoBoost Tow Max FX4 Lariat Travel with one Standard Schnauzer and one small Timneh African Gray Parrot, retired mechanical engineer
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07-06-2022, 08:35 PM
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#5
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Community Administrator
Tiffin Owners Club
Join Date: Sep 2013
Location: DFW, Texas
Posts: 19,532
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Quote:
Originally Posted by MattDodd
How’s it going so with the inverter out of the picture not hooked up shouldn’t the outlets all work?
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Not necessarily. Any outlets that are powered by the inverter, shore power has to pass through it. When on shore power, they automatically switch to that and when off shore power they are powered by the inverter.
__________________
2017 Phaeton 40IH XSH Maroon Coral - Power Glide Chassis with IFS
Previous '15 Tiffin Allegro RED 38QRA and '06 Itasca Sunrise 35A
'16 Jeep JKU Wrangler Sahara or '08 Honda Goldwing
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07-06-2022, 09:00 PM
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#6
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 30,408
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Quote:
Originally Posted by MattDodd
I own a 2000 knight shouldn’t all the 110 plugs in the coach work when plugged into 50A shore power?? I’m in the process of changing inverter charger and noticed that a bunch of outlets don’t work with out the inverter hooked up!
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Normal ; any circuit ( outlet or appliance ) that is powered when the inverter is in use , won't work if the inverter is removed .
These circuits are referred to as " pass through " when the inverter gets shore power, an internal control board switches relays to pass through power to the circuits and starts the charge system.
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99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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07-06-2022, 09:04 PM
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#7
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Junior Member
Join Date: Jul 2022
Posts: 4
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Quote:
Originally Posted by Skip426
Normal ; any circuit ( outlet or appliance ) that is powered when the inverter is in use , won't work if the inverter is removed .
These circuits are referred to as " pass through " when the inverter gets shore power, an internal control board switches relays to pass through power to the circuits and starts the charge system.
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Got it thank you
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07-08-2022, 08:03 AM
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#8
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Senior Member
Join Date: Jun 2011
Location: FL
Posts: 11,164
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Welcome to the forum:
Your question has been answered well.
There are likely relays inside the inverter that switch the path of the power. Your shorline or generator power "passes through" those relays as mentioned already.
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Certified Senior Electronic Technician, Telecommunications Engineer, Telecommunications repair Service Center Owner, Original owner HR 2008
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07-08-2022, 08:08 AM
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#9
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Senior Member
Join Date: Oct 2014
Posts: 7,288
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Outlets powered by the inverter can get power from EITHER shore power (pass through feature) OR by the inverter "inverting" power from the 12 VDC batteries.
With the inverter removed neither source of 120 VAC is available.
__________________
Brett Wolfe
Ex: 2003 Alpine 38FDDS. Ex: 1997 Safari Sahara. Ex: 1993 Foretravel U240
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07-08-2022, 07:19 PM
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#10
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Senior Member
Monaco Owners Club
Join Date: Aug 2009
Posts: 464
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Hopefully you have resolved your issue by now. But in the event you haven't, I installed a new inverter a while back that was a little different from the old one I removed. The new one has multiple hot lugs on it, where some worked only on the inverting of power and as a previous post mentioned, one of the lugs was a pass through for both inverting and shore power. So, I had to go back and move my wires around for SP to pass through. I added a separate switch box at the inverter to operate my fridge separately as well. Good luck.
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