Go Back   iRV2 Forums > TRAVEL TRAILER, 5th WHEEL & TRUCK CAMPER FORUMS > 5th Wheel 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 06-04-2011, 07:10 PM   #15
Senior Member
Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 21,173
You mentioned the device that automatically "Switches" from 12 volt to 120 volt.

No such device exists.

There are two different types of converters (These devices CONVERT 120vac to 12VDC and a couple different types of INVERTERS, which convert in the INVERSE diirectin.. I'm thinking you have an inverter.. Something like my Prosine 2.0 more on that in a mintue.

In the converter department. The old Magnetek 6300 line did, in fact switch over selected loads (light bulbs for example) from battery power to converter power. However if you have one of these.. Get a better converter, Modern converters do not switch from 120 to 12v. They operate in parallel just like the Lights on your car, (towed) when the engine is off, they run off the battery, when the engine is running , off the alternator, but the systems are in parallel, there is no "Switching" at all.

However in some modern INVERTERS, such as the Prosine 2.0 They monitor line voltage (120vac shore or generator) and if it is present and WITHIN SPEC they pass power on to the down-line 120 volt things

if the shore or generator power is either 1: NOT present or 2: Out of spc, they will switch over to battery power and invert it to 120vac.

Now,,, Generators come in assorted flavors.

The popular Honda or Yahaha, Kipor, Champion and ____ Fill in other makes____ Inverter generatrs generally put out good, clean 120vac well within specs, It is s true sine wave, nice and sharp on a scope, looks good and sweet and the inverter senses "Good power" and passes it.

Shore power. likewise is usually within spec (not always as it turns out) usually not as clean as an inverter generator either.

A good fairly large generator,, The exmple I'm going to use is the ONAN 5500 (Though here to the _____ applies, it's a long list) tend to be nice, clean and well regulated as well. The prosine should pass them no sweat.

However many of the portable "Contractor" type generators, these open frame, 3600 RPM shaft speed, portable ear buster generators are even noiser on the power line than to the ear drum.. The waveform is nothing at all loke a nice sharp sine wave, more like a wolly catapiller is crawling on the scope, the harmonics are way beyond 120 HZ and voltage may be spiking over 1,000 volts peak to peak (instead of 120 * 1.414)

The inverter senses "Dirty power, bad power, STAY IN INVERTER MODE" and does just that.

That may be your problem, Are you using a contractor's type generator, or a quality low speed or inverter type?

Home is where I park it!
wa8yxm 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!


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
Remote generator start not working, please help ShapeShifter Monaco Owner's Forum 20 08-24-2016 11:05 AM
Onan 7.5 Diesel Genset generator will not start yelvero MH-General Discussions & Problems 20 03-20-2011 06:11 AM
5 amp slo-blow fuse for generator andrewsmike Fleetwood Products Owner's Forum 1 09-28-2010 05:47 PM
EC-30W Auto Generator Install 69RoadRunner MH-General Discussions & Problems 8 07-23-2010 12:58 PM
Actual Dog House (bow-wow!) For Generator SoundProofing! kctrading 5th Wheel Discussion 7 11-23-2008 10:04 AM

» 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 06:16 AM.

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