Reply
 
Thread Tools Search this Thread Display Modes
 
Old 12-09-2003, 07:33 AM   #1
4 Rivet Member
 
Join Date: Jun 2002
Posts: 304
Images: 7
Inverter question

I just noticed an ad from Lowes that had a couple of inverters for $24 and $29 listed. They both plug into a cigarette lighter bracket and convert 12 volt to 110. Could these be used for a short period of time to make coffee or some similar function while boondocking? How much would they draw down the house battery?
Dan
__________________

__________________
Dbraw is offline   Reply With Quote
Old 12-09-2003, 07:45 AM   #2
3 Rivet Member
 
mcneon's Avatar
 
Join Date: Jun 2003
Posts: 189
Images: 4
Dan, I'm afraid you won't get nearly enough 110 volt power from one of these to run a coffeemaker. You're limited by the amount of current you can draw from the cigarette lighter socket, which is usually 20 amps. That gives a practical limit of around 250 watts.

My coffeemaker is 800 watts and draws 70 amps from the batteries. To provide that level of power, you need a higher-power inverter, heavy battery cables and, ideally, lots of house battery capacity to draw from.

Bob McKeown
Nashville
__________________

__________________
mcneon is offline   Reply With Quote
Old 12-09-2003, 07:50 AM   #3
Rivet Master
 
RoadKingMoe's Avatar
 
2001 34' Limited
The State of , Ohio
Join Date: Sep 2002
Posts: 1,605
Images: 23
The cigarette lighter outlets that are part of the plate with the TV hookups are only rated for 8A or about 100W. Winegard warns of them melting at higher current. You can use them for a small inverter to power a low wattage electronic device such as a small TV and satellite receiver.
__________________
Maurice
RoadKingMoe is offline   Reply With Quote
Old 12-09-2003, 08:54 AM   #4
2 Rivet Member
 
donnall's Avatar
 
Join Date: Nov 2003
Posts: 96
I got an inverter yesterday at OfficeMax for only $9.99 (after $10 rebate) although it won't handle a coffey maker it should be great for recharging my camera batteries, Lap Top, and stuff like that.

Don
__________________
Don Nall
93 Land Yacht (The Minnow)
donnall is offline   Reply With Quote
Old 12-09-2003, 10:52 AM   #5
4 Rivet Member
 
Join Date: Jun 2002
Posts: 304
Images: 7
Inverter Info

Thanks to all for the ionformation. If it wasn't for this Forum, I would still be trying to figure out how to open the door on our Airstream.
Dan
__________________
Dbraw is offline   Reply With Quote
Old 12-09-2003, 11:25 AM   #6
Rivet Master
 
ALANSD's Avatar

 
1966 26' Overlander
Woodstock , Georgia
Join Date: Feb 2002
Posts: 8,462
I bought my inverter (a jensen) new off EBAY for 15 bucks. It handles two good sized appliances at a time. We use it to run the TV and Video games when on the road without the generator running. There are often good deals on them there.
__________________
1966 Overlander
AIR #005
Please visit our blogs and web pages:
OUR AIRSTREAM PASSION! BLOG
RESTORING AN AIRSTREAM
Our AIRSTREAM and TIN CAN TOURIST Rallys
ALANSD is offline   Reply With Quote
Old 10-26-2004, 11:50 AM   #7
4 Rivet Member
 
casarodante's Avatar

 
2012 31' Classic
Visalia , California
Join Date: Apr 2002
Posts: 480
Images: 29
This looks like a good place to ask this question.

Picked up a cheap inverter that says it does 350 watts. I have a TV and sat receiver that I want to be able to power. According to my Kill-a-watt monitor, the TV does 40-45 watts and the sat receiver does 11. What else should I be looking at? Amps, etc?

I am not looking to power my microwave, just some small convenience items. What is the estimation on power drain on the battery? Is there a link that spells this all out?

Thanks for the help!

Roger
__________________
Roger & Roxie (rore62) Smith (Air#178 - WBCCI#1646)
Visalia, CA (between Fresno & Bakersfield)
2012 31' Classic - Nuestra casa rodante
Blog: http://www.casarodante.org - Old Airstream slides: http://airstream.casarodante.org
casarodante is offline   Reply With Quote
Old 10-26-2004, 12:25 PM   #8
3 Rivet Member
 
71_safari's Avatar
 
Currently Looking...
West Linn , Oregon
Join Date: Apr 2004
Posts: 195
Images: 12
Smile Ohm's Law

Hi Roger,

Well good for you for actually using the KillAWatt instead of guessing. It must be a flat screen tv as 45 watts would be low for a conventional tv unless it is really small. Anyway, if your load is roughly 60 watts total, that would be .5 amp at 120 VAC, or 5 amps at 12 volts which is what your power source is (Ohm's Law, V x A=W). However the inverter has some losses, especially a cheap one. Say 20% or so and you have a total load from your 12V house battery of about 6 amps.

You then need to find the total rating of your house battery, but if you have 2 house batteries, each with a 60 amp/hour rating at 12 volts, you have 120 amp/hrs of capacity. That is roughly 120 amps for one hour, or 1 amp for 120 hrs, or anything in between. You don't want to drain them below 50% or it negatively impacts the life of the battery. So you have a useable 60 amp/hrs capacity, which is 10 hrs, with a 6 amp load. Assuming no other loads.

Hope that helps.

-john
__________________

__________________
Currently living in SE Asia
1971 Safari 23 (sold)
71_safari 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 10:57 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.