Go Back   iRV2 Forums > iRV2.com COMMUNITY FORUMS > iRV2.com General Discussion
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 07-16-2015, 03:55 PM   #1
Senior Member
kekker's Avatar
Join Date: Apr 2012
Location: West Jordan, Utah
Posts: 203
Generator Output Test?

I have Champion 3500-4000 watt Gen. it will not power my TT A/C.
the A/C on my load tester shows 540 watt draw when hooked to shore
power. the Gen. should have way more than enough power, any ideas?

kekker 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 07-16-2015, 04:43 PM   #2
Senior Member
Walt Bennett's Avatar
Mid Atlantic Campers
Join Date: Sep 2012
Posts: 258
What size is your AC? We've a Harbor Freight 3200/4000 generator that'll power our 15k btu one fine.

2010 Montana 3665RE, wet bolts, etc.
2006 Ford F350 Diesel Dually, air bags, Softopper, Aeroshild, etc.
Walt Bennett is offline   Reply With Quote
Old 07-16-2015, 05:34 PM   #3
Senior Member
Join Date: Sep 2012
Posts: 4,048
Is the Champion Generator a real AC Generator or an Inverter generator like the Honda?

If the former it could be shutting down because the starting current is higher than it's safety sensors can tolerate. If the latter it should big down but keep running as the AC motor spins up.
nothermark is online now   Reply With Quote
Old 07-16-2015, 06:03 PM   #4
Senior Member
J Birder's Avatar
Join Date: Feb 2012
Location: Lake County, IL
Posts: 1,103
If it is an inverter generator, and if you have it in economy mode, the AC starting current might be too much for it.

Retired electronics engineer. Avid paddler & birder.
2011 Silverado 2500HD, diesel, 4x4,crew cab, 8' bed
Palomino Puma 253FBS (27' 5er) & '94 19' Class B
J Birder is offline   Reply With Quote
Old 07-16-2015, 06:18 PM   #5
Senior Member
BrianGlenn's Avatar

Country Coach Owners Club
Join Date: Apr 2015
Location: Alberta
Posts: 510
A true load test on a generator requires a special electrical load bank that is usually not available to a DIYer. Any reputable generator repair shop, or service centre should have the appropriate tools and able to load test your generator for a fee.

Some 15K BTU/hr air conditioner have a large in-rush current as mentioned. I installed a Supco SPP6E boost capacitor on a previous trailer. Here is a link to a mod page, and a you tube video of an install of another brand of a hard start capacitor.

Hope this helps,
Towr: 2007 Country Coach Allure 470 - 37 Sunset Bay Cummins 400 ISL
Toad: 2007 Jeep Grand Cherokee (yes, it has a Hemi)
BrianGlenn is offline   Reply With Quote
Old 07-16-2015, 06:32 PM   #6
Senior Member
Commercial Member
Join Date: Aug 2012
Posts: 577
Originally Posted by kekker View Post
I have Champion 3500-4000 watt Gen. it will not power my TT A/C.
the A/C on my load tester shows 540 watt draw when hooked to shore
power. the Gen. should have way more than enough power, any ideas?

A 15000btu Air Conditioner draws 14amps running and 20+ surge when the compressor starts. That is 1680 watts running. Given that, your 540 measurement is incorrect.

I looked up that model generator and its 30amp twist-lock outlet is protected by a 25amp circuit breaker. With that said, your air conditioner and anything else running such as your Converter in your trailer will overload that specific generator.

Often the advertised ratings of generators are a stretch of the truth. In fact in that specific case, the continuous rating is 2850 watts not 3000 or 4000.

Sent from my iPad using iRV2 - RV Forum
TravellingRVDoctor, LLC
shiggs68 is offline   Reply With Quote
Old 07-16-2015, 08:54 PM   #7
fixintodoit's Avatar
Ford Super Duty Owner
Join Date: May 2007
Location: San Angelo,Tx.
Posts: 67
I had the same Champion Gen. on the back of my Excel 5th wheel it ran the 15000 A/C just fine. Ran lights, T.V., A/C, water pump, all at the same time no problem. Great generator for the $$ IMHO

2008 Pleasureway Excel- Ford V-10
2015 Rockwood Mini Lite TT #2109S
fixintodoit is offline   Reply With Quote

generator, test

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
Generac Q-55, test #6, 2.3 ohms vs 1.43 specs John USA RV Systems & Appliances 3 07-16-2015 09:17 PM
Has anyone taken the California Non-commercial Class B driving test? dpinvidic Class A Motorhome Discussions 37 12-14-2014 03:14 PM
Current Texas Class B Non-CDL License Test akadeadeye Class A Motorhome Discussions 29 09-11-2014 03:57 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 10:19 AM.

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