Go Back   iRV2 Forums > TRAVEL TRAILER, 5th WHEEL & TRUCK CAMPER FORUMS > 5th Wheel Discussion
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  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 07-13-2013, 05:26 PM   #1
Member
 
Join Date: Jul 2012
Location: St. Louis, MO
Posts: 42
5th Wheel A.C. wattage?

We have a 30 ft. Coachman Chapparal 5th wheel. Does anyone know how much wattage the A.C. pulls? I have an emergency generator that can handle 1650 watts. Thanks! Jim from St. Louis
__________________

__________________
Pawjam3 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 07-13-2013, 05:37 PM   #2
Senior Member
 
Ray,IN's Avatar
 
Join Date: Aug 2001
Location: North America somewhere
Posts: 13,699
Quote:
Originally Posted by Pawjam3 View Post
We have a 30 ft. Coachman Chapparal 5th wheel. Does anyone know how much wattage the A.C. pulls? I have an emergency generator that can handle 1650 watts. Thanks! Jim from St. Louis
I've never seen that small a genset with a 30A receptacle, a 15A receptacle will likely overheat if you genset could manage to power your A/C unit.
Your air conditioner will have a data plate showing the starting amperes draw and running amperes draw. Olders units could draw around 13A while running, newer units around 9A running. Amps X volts = watts, so 13 X 120 = 1,560 watts.
You must figure in your converter draw that is re-charging the house batteries, and anything else operating on AC voltage. Your genset might barely power your A/C running, but startup draw will be too much for your genset to handle.
__________________

__________________
2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member,FMCA."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert the Constitution. "Abraham Lincoln"
Ray,IN is offline   Reply With Quote
Old 07-13-2013, 05:44 PM   #3
Senior Member
 
CampDaven's Avatar


 
Join Date: Jul 2012
Location: Fulltime, USA
Posts: 14,452
Blog Entries: 1
The formula is P=IxE.
Watts = current x voltage

a 13,500 btu unit draws about 14 amps, so 120V x 15A = 1680 watts.
This is just my guess.

So, it might run if that is the only draw (nothing else plugged in or running) but I doubt it could handle the surge on AC start up.

Others may chime in on this.
__________________
Dave and Nola, RVM1
The Journey is Our Destination!

http://davenola.blogspot.com/
CampDaven is offline   Reply With Quote
Old 07-13-2013, 06:59 PM   #4
Senior Member
 
hjsdds's Avatar
 
Join Date: Apr 2013
Posts: 330
Quote:
Originally Posted by CampDaven View Post
The formula is P=IxE.
Watts = current x voltage

a 13,500 btu unit draws about 14 amps, so 120V x 15A = 1680 watts.
This is just my guess.

So, it might run if that is the only draw (nothing else plugged in or running) but I doubt it could handle the surge on AC start up.

Others may chime in on this.
Right on, since 1781 when Georg Ohm got zapped by electricity and decided to figure it out. All appliances have a sticker telling you how much current they take, so use the formula above and add everything running to see if the genset is up to the task. Probably not.

hjs
__________________
hjsdds is offline   Reply With Quote
Old 07-13-2013, 07:03 PM   #5
Senior Member
 
Join Date: Sep 2012
Posts: 4,232
AC could draw 13-14A depending on fan speed, ambient temp, etc. Then converter can pull quite a bit, depending on lights and batt. condition. Say 5A avg. Then refr heating element is 2.8 or so, so 3A.
22A. 120VAC. 2640W.
__________________
jesilvas is offline   Reply With Quote
Old 07-14-2013, 08:13 AM   #6
Senior Member
 
wa8yxm's Avatar
 
Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 22,792
Air Conditoners vary and you can't tell by the BTU's. You can tell by finding the label on the upper unit and reading it, that is the only way.. I have two DIFFERENT A/Cs on my Motor home the OEM Carrier Air V is 13,500 BTU draws 13.5 amps running, the new Advent Air 15,000 btu job draws 13.5 Amps running, 13.5 times 120 is the volt-amp rating. (Too early in am for me to do math).

This is typical of many a/c's but some draw more, some less.

Worry about Volt-amps, not watts, by the way. Though the better the A/C. the less the difference.
__________________
Home is where I park it!
wa8yxm is offline   Reply With Quote
Old 07-14-2013, 08:33 AM   #7
Senior Member
 
Join Date: Jun 2011
Posts: 359
You'll need more generator. 1650 is enough to charge your batteries and run your fan, the start and continuous run load on your A/C compressor will take another 2000 or so.
__________________

__________________
2007 K-Z 35 Toyhauler, 2006 Chev 2500HD Duramax, 2005 H-D Road King Classic, 2007 Mini-Schnauzer "Scooter"
menoble is offline   Reply With Quote
Reply



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


» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 11:18 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.