Go Back   iRV2 Forums > iRV2.com COMMUNITY FORUMS > iRV2.com General 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 08-31-2015, 11:12 AM   #1
Member
 
Join Date: Jun 2014
Location: Where my wheels are
Posts: 76
Extension Cord on Inverter

My only 12-volt socket in my TT is in the front which is the bedroom and near the house batteries. My entertainment center is over 30 feet away in the back. I want to plug an inverter into the socket for the TV, DVR, etc. 30 feet away. How long of an extension cord (with a power strip on the end) can I run? I'm looking at a BESTEKŪ 2 AC Outlets 1000W Power Inverter on Amazon.
__________________

__________________
2013 Rockwood 8523 TT - 2007 GMC Sierra 2500HD Diesel - Buster & FlipperDoodle (cats). - Full-timer from NorCal.
GVJeeper 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 08-31-2015, 11:44 AM   #2
Moderator Emeritus
 
Gary RVRoamer's Avatar


 
Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 18,085
Plug the inverter into the nearest possible 12v source and keep the 12v cord short (and use a fat one). The extension from the inverter to the 120v units can be as long as you like. At the loads you are talking about, the power loss on the 120v side is negligible up to maybe 50 ft.

Be aware that the 12v socket probably cannot provide anywhere the power (amps) the inverter might demand. A 1000W inverter at full load needs about 90 amps from the batteries, and a typical 12 plug-in outlet can handle maybe 10-12 amps. Often they are fused for 10A. That enough for the inverter to power one device with about 100w power requirement, e.g. a modest sized tv. You will probably want to hard wire the inverter to the battery(s) with a heavy gauge battery cable.

Also be aware that the single small battery typical of many TT's is going to come up short trying to supply a large inverter. When the inverter sucks a lot of amps, the battery voltage soon falls and the inverter shuts down.
__________________

__________________
Gary Brinck
Former owner of 2004 American Tradition
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC
Gary RVRoamer is offline   Reply With Quote
Old 08-31-2015, 01:07 PM   #3
"Formerly Diplomat Don"
 
Dutch Star Don's Avatar
 
Newmar Owners Club
Join Date: Apr 2005
Location: Moorpark, Ca.
Posts: 9,295
If you want to do it right, skip the socket, they're wiring is usually very light weight and will either blow a fuse or cause other issues, especially running a 1000 watt inverter.

Instead, run one large #6 or #8 wire from your battery(s) to the rear of the coach along the frame rail and then bring it into the coach near your entertainment center. Run a short ground off of the frame near the back, giving you your two leads needed for the inverter.
__________________
Don & Mary
2014 Newmar Dutch Star - All Electric - 450 ISL
2016 GMC Canyon 4WD Crew Cab
Dutch Star Don is online now   Reply With Quote
Old 08-31-2015, 01:26 PM   #4
Registered User
 
tbbg II's Avatar
 
Newmar Owners Club
Join Date: Feb 2013
Location: Mooresville IN
Posts: 230
Quote:
Originally Posted by Dutch Star Don View Post
If you want to do it right, skip the socket, they're wiring is usually very light weight and will either blow a fuse or cause other issues, especially running a 1000 watt inverter.

Instead, run one large #6 or #8 wire from your battery(s) to the rear of the coach along the frame rail and then bring it into the coach near your entertainment center. Run a short ground off of the frame near the back, giving you your two leads needed for the inverter.
This is a bad idea (sorry, Don). It may work for the TV only, but the inveter can draw up to about 90 amps of DC. If you plugged in enough stuff to draw the 1000 watts it is capable of, you would need #1 or 1/0 wire to keep the voltage drop under 3% (to keep the wire from heating up). Some folks are comfortable with a 10% drop, but that would trip the inverter on voltage a lot quicker and the wire would get warm.

It may make more sense to wire the inverter to the batteries as close to the batteries as possible. Depending on the distance 6 gage would work (5 feet). I would never try to connect a device this big with a cigarette lighter connection. Then use a standard 120VAC extension cord. A 14g 50' cord would work.

Voltage drop is a function of amps and distance. 12VDC amps are some 10X the 120VAC amps for the same wattage.
__________________
tbbg II is offline   Reply With Quote
Old 08-31-2015, 01:31 PM   #5
Senior Member
 
Join Date: Jul 2014
Posts: 9,899
I just looked at some wire gauge charts. #6 or #8 will work for the TV stuff.

If your going to install a 1000 watt inverter and ever want to use it at full load, you should use #4 wire if close to the battery or #2 gauge wire if 10 or more feet away.

In any case putting the inverter close to the batteries and running the 120 volt power, long distances is best.
__________________
twinboat is offline   Reply With Quote
Old 08-31-2015, 10:17 PM   #6
"Formerly Diplomat Don"
 
Dutch Star Don's Avatar
 
Newmar Owners Club
Join Date: Apr 2005
Location: Moorpark, Ca.
Posts: 9,295
"tbbgII"......I understand what you're saying, but did you read what he wanted to do. He was going to plug it into a cigarette lighter outlet. Those are wired with #16 or #18 wire. Yes, I would run a #1 or larger, but apparently he's buying some type of inverter that uses a cigarette plug. I don't know how they get 1000 watts out of a cigarette lighter.

I wasn't going to argue the value of what he was doing, just making a suggestion. I used 1/0 cable for 36" on my 600 watt inverter I ran for my residential refer.
__________________
Don & Mary
2014 Newmar Dutch Star - All Electric - 450 ISL
2016 GMC Canyon 4WD Crew Cab
Dutch Star Don is online now   Reply With Quote
Old 08-31-2015, 10:35 PM   #7
Senior Member
 
vsheetz's Avatar


 
Fleetwood Owners Club
Ford Super Duty Owner
Join Date: Jun 2012
Location: SoCal
Posts: 11,799
Install the inverter near the batteries to keep the DC power run short. Use a smaller inverter, it will be more efficient. One with a remote on/off or auto power off sensing. Long AC run to the devices to be powered is ok. Power a switched power strip where all the devices are then plugged into it. This way you can stop phantom power draw.

Consider the Morningstar inverter.

IMHO.
__________________
Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.
vsheetz is online now   Reply With Quote
Old 08-31-2015, 11:56 PM   #8
Member
 
Join Date: Jun 2014
Location: Where my wheels are
Posts: 76
I think I'll go with a smaller inverter and wire it directly to the batteries (two 12-v) right there in the bedroom (only a couple feet to the batteries). Then use an extension cord to the entertainment center.

Thanks for all the answers (p.s. I'm a "she" and I drive a GMC 2500 pulling a 35ft Rockwood TT).
__________________
2013 Rockwood 8523 TT - 2007 GMC Sierra 2500HD Diesel - Buster & FlipperDoodle (cats). - Full-timer from NorCal.
GVJeeper is offline   Reply With Quote
Old 09-01-2015, 12:07 AM   #9
Member
 
Join Date: Jun 2014
Location: Where my wheels are
Posts: 76
I don't plan on loading it up...just run the wifi modem/router, 42" Visio smart TV, DirecTV DVR and my laptop. So what size inverter would you suggest and what wire gauge to the house batteries? If I go with a much smaller one can I still use the 12v cigarette lighter-type plug in the bedroom?

Again, I appreciate all your ideas and suggestions.
__________________
2013 Rockwood 8523 TT - 2007 GMC Sierra 2500HD Diesel - Buster & FlipperDoodle (cats). - Full-timer from NorCal.
GVJeeper is offline   Reply With Quote
Old 09-01-2015, 07:09 AM   #10
Member
 
leeshearer's Avatar
 
Join Date: Jun 2015
Posts: 32
The best way to figure your power requirements is to look at the devices. They will tell you how much they draw. My 42" plasma tv at home draws 400 watts.
__________________
leeshearer is offline   Reply With Quote
Old 09-01-2015, 12:08 PM   #11
Member
 
Join Date: Jun 2014
Location: Where my wheels are
Posts: 76
My TV, DVR and wifi add up to just less than 200. My TV says 120v@1.3a so that's 156 watts...right? So...

if still use the 1000w inverter but only use 200watts, am I ok with the 12v socket do I still have to wire it directly to the batteries....safely?

I got the 1000w free so really don't want to buy a smaller one if I can still use it in my 12v socket....SAFELY.
__________________
2013 Rockwood 8523 TT - 2007 GMC Sierra 2500HD Diesel - Buster & FlipperDoodle (cats). - Full-timer from NorCal.
GVJeeper is offline   Reply With Quote
Old 09-01-2015, 12:55 PM   #12
Senior Member
 
Join Date: Jul 2014
Posts: 9,899
Set it up and try it. If the wiring is to small, you will get a low battery warning from the inverter as you turn things on.

Devide your watts by volts for amp draw.

You could also try other power outlets, that may be closer to the batteries if it warns of low voltage.
__________________
twinboat is offline   Reply With Quote
Old 09-01-2015, 10:30 PM   #13
Moderator Emeritus
 
Gary RVRoamer's Avatar


 
Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 18,085
200 watts plus about 10% inverter power loss comes to 220 watts or about 18 amps from the batteries. I don't think any 12v "cigar lighter" socket is going to deliver that much, or at east not for very long. Or even have a fuse big enough for that much load. You need to hard wire. Or at least have good quality clip leads direct to the battery.

A typical 12v outlet is wired and fused for 10A. The better ones, e.g. the one in a Tesla, are 15A.

You can buy heavy duty 12v outlets rated for 20A, but you would have to wire it in yourself with a heavy gauge wire to the battery and a 20A fuse. Just as easy to hardwire the inverter itself unless you need for it to be portable.
__________________
Gary Brinck
Former owner of 2004 American Tradition
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC
Gary RVRoamer is offline   Reply With Quote
Old 09-02-2015, 11:32 AM   #14
Member
 
Join Date: Jun 2014
Location: Where my wheels are
Posts: 76
Thanks Gary. For me fire is a big issue so I'd want to be sure I wasn't overloading anything. I'll go for the hard wire.

I'm pretty handy but not sure what to do as the inverter has a 12v (cig-type) on it. How would I hard wire the inverter end? I can do the battery end but not sure how I would "replace" the 12v plug with a hard wired cable. Maybe I should just have someone do it for me.
__________________

__________________
2013 Rockwood 8523 TT - 2007 GMC Sierra 2500HD Diesel - Buster & FlipperDoodle (cats). - Full-timer from NorCal.
GVJeeper 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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Magnum inverter and Morningstar TriStar Solar controller problems lajuene RV Systems & Appliances 6 08-11-2015 10:48 AM
Norcold on inverter tompn Monaco Owner's Forum 5 06-15-2015 10:21 PM
Freedom 458 inverter voltage fluctuation Oakviewjeff RV Systems & Appliances 2 11-29-2014 10:27 PM
Need help troubleshooting inverter issues caheath National RV Owner's Forum 16 11-27-2014 01:39 PM
Residential Refrigerator / MSW vs PSW Inverter Robin_M RV Systems & Appliances 53 06-26-2014 09:24 PM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 11:55 PM.


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