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 06-21-2012, 10:05 AM   #1
Junior Member
 
Join Date: Dec 2011
Location: Manitoba
Posts: 16
Inverter

I have a 700 watt inverter ,I only need a 300 watt,will a 700 watt drain my battery more than a 300 watt?THX
__________________

__________________
edge10world 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 06-21-2012, 11:06 AM   #2
Senior Member
 
450Donn's Avatar
 
Join Date: Jun 2006
Location: Dallas,OR
Posts: 2,553
No. 700 watts is the max the inverter will put out. More than likely if you look closely that is MAX rated and actual running watts is more like 4-500.
__________________

__________________
Don and Lorri
2007 Dodge 3500 dually
Resident Dummy.
450Donn is offline   Reply With Quote
Old 06-21-2012, 11:19 AM   #3
Senior Member
 
Ramblin's Avatar
 
National RV Owners Club
Workhorse Chassis Owner
Ford Super Duty Owner
Carolina Campers
Join Date: Aug 2011
Posts: 2,253
Quote:
Originally Posted by edge10world View Post
I have 700watt inverter,I only need a300 watt ,will a 700 watt drain my battery faster than a 300?
I think the question you are asking is if a 700W inverter draws 700W when it's on regardless of the load. I don't believe it does. I believe the inverter draws power it needs based on the load that is presented, plus inverter overhead and efficiency loss. So, a 300W inverter probably won't save you any measurable battery over your existing 700W one.
__________________
2002 National Dolphin LX 6356
Workhorse W-22 chassis
Don't believe everything you think.
Ramblin is offline   Reply With Quote
Old 06-21-2012, 11:20 AM   #4
Senior Member
 
CHCam42's Avatar
 
Join Date: Apr 2011
Posts: 300
I think The inverter only supplies what is required. Normally coaches and TT are equipped with inverters sized to run the appliances installed, excluding AC.
__________________
Clark and Jo
2009 Camelot
2010 Jeep Wrangler Toad
CHCam42 is offline   Reply With Quote
Old 06-21-2012, 11:24 AM   #5
Registered User
 
Join Date: Dec 2010
Posts: 336
It might take a little more juice to run it. Anything bigger will take more, like a 19inch tv uses less than a 54inch would but like he said it's all in what you plug into it.
__________________
jimbo16720 is offline   Reply With Quote
Old 06-21-2012, 12:25 PM   #6
Senior Member
 
wa8yxm's Avatar
 
Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 22,792
Quote:
Originally Posted by edge10world View Post
I have a 700 watt inverter ,I only need a 300 watt,will a 700 watt drain my battery more than a 300 watt?THX

The short answer is yes, but a better question is "How much faster"

If your batteries would last say 48 hours with the 300 watt.. With the 700 watt they might drain in say 47 hours 45 minutes.

In short, not enough difference to matter.
In practice, you likely do not havfe 48 hours worth of batteries.

I would NOT recommend replacement of the inverter.

page 2: True sine v/s MSW.

For years I figured MSW were more "Efficient" then one day, for some reason or another (Likely to answer a question in a forum) I researched and much to my surprise.

On one line I checked,, Peak effiecency on the MSW was 90%

On the TSW.. 90 % (Well 89-90 percent)

In short, again not enough difference to matter.
__________________
Home is where I park it!
wa8yxm is offline   Reply With Quote
Old 06-21-2012, 01:01 PM   #7
Senior Member
 
Wanabee FTer's Avatar
 
Gulf Streamers Club
Ford Super Duty Owner
Join Date: Jul 2010
Location: Golden Village Palms, CA
Posts: 1,988
Blog Entries: 12
A cheap inverter may draw more amps at idle and/or be less efficient at converting voltage.

Look for the spec's on your inverter, there should be .6 or less amp draw with no load and appx 90% efficiency.

Otherwise the only difference between a 300 and 700 watt inverter would be the laters ability to run over twice as much load which could run down the batteries much faster.
__________________
John
'98 Gulf Stream Sunsport 325, 7.5L Banks Power Pack, Koni FSD's, Air Bags, ReadyBrute Elite,
2000 Honda Accord

Wanabee FTer is offline   Reply With Quote
Old 06-21-2012, 02:52 PM   #8
Moderator Emeritus
 
RickO's Avatar


 
Join Date: Jan 2007
Location: Litchfield Park, Arizona
Posts: 10,530
Hi and welcome to the forum.

I have merged the two threads you started on this topic since we don't allow duplicate posts in multiple forums.

Thanks

Rick
__________________
Rick, Nancy, Peanut & Lola our Westie Dogs & Bailey the Sheltie.

2007 Itasca Ellipse 40FD
RickO is offline   Reply With Quote
Old 06-22-2012, 07:32 AM   #9
Junior Member
 
Join Date: Dec 2011
Location: Manitoba
Posts: 16
Thanks for info and help.
__________________
edge10world is offline   Reply With Quote
Old 06-22-2012, 07:37 AM   #10
Junior Member
 
Join Date: Dec 2011
Location: Manitoba
Posts: 16
Thanks for info and help.
__________________
edge10world is offline   Reply With Quote
Old 06-22-2012, 07:38 AM   #11
Junior Member
 
Join Date: Dec 2011
Location: Manitoba
Posts: 16
Whoops I did it again?
__________________
edge10world is offline   Reply With Quote
Old 06-22-2012, 07:51 AM   #12
Senior Member
 
Ramblin's Avatar
 
National RV Owners Club
Workhorse Chassis Owner
Ford Super Duty Owner
Carolina Campers
Join Date: Aug 2011
Posts: 2,253
Quote:
Originally Posted by edge10world View Post
Thanks for info and help.
You're welcome.
Quote:
Originally Posted by edge10world View Post
Thanks for info and help.
You're welcome.
Quote:
Originally Posted by edge10world View Post
Whoops I did it again?
Yes. Yes you did.
__________________

__________________
2002 National Dolphin LX 6356
Workhorse W-22 chassis
Don't believe everything you think.
Ramblin is offline   Reply With Quote
Reply

Tags
inverter



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 11:12 AM.


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