Go Back   iRV2 Forums > MOTORHOME FORUMS > MH-General Discussions & Problems
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 06-16-2015, 02:59 PM   #1
Junior Member
Join Date: Jun 2015
Posts: 1
Loss of coach power

We were plugged into 50 AMP service. Had to keep the inverter on to run the TV. Surge monitor read 117V 24A over 123V 0A. What does that mean? Dropped to 118V 13A over 121V 10A and back half of the coach lights got dim. Any suggestions?

ldb42751 is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 06-16-2015, 06:45 PM   #2
Senior Member
BFlinn181's Avatar

Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 12,633

50 amp RV service is composed of two 'legs' of 50 amp power, for a total of 100 amps in reality. 30 amp service is one leg of 30 amp power. That's why 50 amp service provides almost 3 times the power of 30 amps!

On your display, "117V 24A over 123V 0A" It was showing one leg was at 117 volts, 24 amps, the other leg was 123 volts 0 amps. Probably you had the air conditioner and the inverter/charger on the first leg, no load on the second leg. If you had turned on the other air conditioner, the load would show on the second leg reading. The second reading was "118V 13A over 121V 10A" which indicates some load was dropped on the first leg while the second leg had picked up 10 amps of draw.

All those numbers are within specs of the pedestal power, The lights that dimmed, were they 12 volt or 120 volt lights? Most interior lights are 12 volt systems. If some went dim, check the connections on your house batteries and ground, they may need cleaning.

The two legs of 50 amp power to your RV is divided up by the way the circuit breaker panel is wired. They try to distribute the possible power needs to both legs so neither is overloaded. Owners can mess with this if they plug in a couple of space heaters or hair dryers all on the same 50 amp leg. It doesn't switch over from one to the other.


Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
BFlinn181 is offline   Reply With Quote
Old 06-18-2015, 09:16 AM   #3
Moderator Emeritus
Gary RVRoamer's Avatar

Fleetwood Owners Club
Freightliner Owners Club
Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 16,432
Those outlets are powered through the inverter, even when on shore power. Your inverter probably has a built-in switch to that uses shore power when available but changes to inverter/battery when needed. If the circuit breaker that feeds 120v to the inverter is tripped, you get no power and no battery charging.
Gary Brinck
2004 American Tradition; 2014 Buick LaCRosse
Homebase in the Ocala Nat'l Forest near Ocala, FL
Gary RVRoamer is offline   Reply With Quote


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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

Similar Threads
Thread Thread Starter Forum Replies Last Post
No AC Power to Coach AU RV Systems & Appliances 6 06-13-2015 08:29 PM
No coach power only generator or show power Retiredcable RV Systems & Appliances 6 06-07-2015 08:35 AM
No Battery Power to Coach LairdT Toy Haulers Discussion 10 01-09-2015 06:47 AM
No AC power to coach... Ramzfan Winnebago Industries Owner's Forum 13 05-04-2014 03:32 PM
ISM power loss only after warmed up The Driver Cummins Engines 12 04-25-2014 04:49 PM

» Virginia Campgrounds

Reviews provided by

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 12:11 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.