Reply
 
Thread Tools Search this Thread Display Modes
 
Old 04-29-2015, 08:37 AM   #1
Rivet Master
 
BambiTex's Avatar
 
1967 26' Overlander
1955 22' Flying Cloud
1964 17' Bambi II
Clear Lake Shores , Texas
Join Date: Nov 2013
Posts: 1,150
Silly question about converters

54 FC is currently 110 volt only so I plan to add a 12 volt system at some point. Probably four circuits: lights, water heater controls, fridge controls, and water pump. None of these loads is very high (water pump will only be intermittent and lights will be LED). No plans to install an inverter as I will not have any 110 volt only appliances except A/C which will only be used on shore power. I will install a single 100Ah AGM battery.
My question is do I really need a converter or can I use a simple four stage battery charger? If I understand correctly, a converter powers all 12 volt loads while plugged into shore power while also charging the battery as needed. A battery charger, on the other hand, would charge the battery as needed but loads would run "through" the battery which I suppose could shorten battery life?
__________________

__________________
BambiTex is offline   Reply With Quote
Old 04-29-2015, 08:58 AM   #2
3 Rivet Member
 
2006 25' Safari FB SE
Merkel , Texas
Join Date: Nov 2012
Posts: 139
I am no expert but I believe you could do just with the battery charger and no converter. But I am not sure why you would want to. On a trip to Alaska a couple of years ago my converter ceased to work about half way through the trip. For the remainder of the trip I would hook the charger to the battery each time we had 120v service and otherwise we lived off the batteries. The inconvenience of it was what I disliked the most. It rained a lot and was just an added chore when setting up for the night. If you are going to permanently attach the charger, why not go with a converter which will be ready to use when you plug in to 120v? Plus it could provide circuit protection for the 12v circuits.
__________________

__________________
afneill is offline   Reply With Quote
Old 04-29-2015, 09:31 AM   #3
Rivet Master
 
BambiTex's Avatar
 
1967 26' Overlander
1955 22' Flying Cloud
1964 17' Bambi II
Clear Lake Shores , Texas
Join Date: Nov 2013
Posts: 1,150
I intend to hard wire either device. Battery charger is smaller, lighter, less expensive and can be configured specifically for AGM batteries.
__________________
BambiTex is offline   Reply With Quote
Old 11-24-2015, 01:58 PM   #4
Rivet Master
 
BambiTex's Avatar
 
1967 26' Overlander
1955 22' Flying Cloud
1964 17' Bambi II
Clear Lake Shores , Texas
Join Date: Nov 2013
Posts: 1,150
Finally close to moving forward on this. Any reason not to get a good 4 stage AGM charger and hard wire it to the battery instead of a big heavy converter?
__________________
BambiTex is offline   Reply With Quote
Old 11-24-2015, 04:47 PM   #5
Rivet Master
 
SteveH's Avatar
 
2005 39' Land Yacht 390 XL 396
Common Sense , Texas
Join Date: Sep 2007
Posts: 5,311
A converter is a simple power supply with the design voltage somewhere close to the output of a car's alternator, 14VDC +,-. The only thing a battery charger won't do that a converter will do, and then only if it is a smart enough battery charger, is power the system without a battery in place.

So, short answer, a battery charger will work just fine for your needs.
__________________
Regards,
Steve
SteveH is offline   Reply With Quote
Old 11-24-2015, 04:57 PM   #6
Rivet Master
 
Melody Ranch's Avatar
 
1956 22' Flying Cloud
1953 32' Liner
1955 22' Safari
Valley View , Texas
Join Date: Jan 2006
Posts: 3,960
Images: 78
Send a message via Skype™ to Melody Ranch
Yes it will work. BUT, WHY? Do it right and prepare for future use and capabilities. You can get an excellent PD Converter with charging for a hundred bucks, plus or minus.
__________________
"If it can't be reduced, reused, repaired, rebuilt, refurbished, refinished, resold, recycled or composted
then it should be restricted, redesigned or removed from production."
Melody Ranch is offline   Reply With Quote
Old 11-24-2015, 05:15 PM   #7
Rivet Master
Commercial Member
 
lewster's Avatar
 
Vintage Kin Owner
Naples, FL , Hood River, OR
Join Date: Dec 2005
Posts: 7,281
Nothing wrong with using a quality multi stage charging system directly to the battery and then drawing the 12VDC loads from that battery. This is exactly how the expensive Magnum inverter/chargers operate when in charge mode.

Just be sure that you get one with adjustable charging parameters for different types of batteries AND temperature compensation. Your AGM battery will definitely thank you for it.
__________________
Lew Farber...ABYC Certified Master Marine Electrician...RVIA Certified Master Tech ...AM Solar Authorized Installation Center...AIRSTREAM Solar & Electrical Specialist...Micro Air 'Easy Start' Sales and Installations
lewster is offline   Reply With Quote
Old 11-30-2015, 09:18 AM   #8
Rivet Master
 
BambiTex's Avatar
 
1967 26' Overlander
1955 22' Flying Cloud
1964 17' Bambi II
Clear Lake Shores , Texas
Join Date: Nov 2013
Posts: 1,150
Recommendations?

Quote:
Originally Posted by lewster View Post
Nothing wrong with using a quality multi stage charging system directly to the battery and then drawing the 12VDC loads from that battery. This is exactly how the expensive Magnum inverter/chargers operate when in charge mode.

Just be sure that you get one with adjustable charging parameters for different types of batteries AND temperature compensation. Your AGM battery will definitely thank you for it.
Are there particular ones you recommend?
__________________
BambiTex is offline   Reply With Quote
Old 11-30-2015, 12:48 PM   #9
Rivet Master
Commercial Member
 
lewster's Avatar
 
Vintage Kin Owner
Naples, FL , Hood River, OR
Join Date: Dec 2005
Posts: 7,281
For folks not wanting to go for a Magnum inverter/charger, Progressive Dynamics makes excellent 3-stage chargers for regular use.

Even though they are not as adjustable as a Magnum and don't have temp. compensation, they still do a good job of keeping batteries well charged.


Lew Farber
RVIA/RVDA Nationally Certified Master Tech
Master Tech Energy Systems, Inc.
AM Solar Certified Installation Center
Lifeline Batteries**Magnum Inverters
541-490-6357
__________________
Lew Farber...ABYC Certified Master Marine Electrician...RVIA Certified Master Tech ...AM Solar Authorized Installation Center...AIRSTREAM Solar & Electrical Specialist...Micro Air 'Easy Start' Sales and Installations
lewster is offline   Reply With Quote
Old 11-30-2015, 01:04 PM   #10
Rivet Master
 
Tincampers's Avatar
 
2006 22' Interstate
Sneedville , Tennessee
Join Date: Feb 2014
Posts: 1,228
Quote:
Originally Posted by lewster View Post
For folks not wanting to go for a Magnum inverter/charger, Progressive Dynamics makes excellent 3-stage chargers for regular use.

Even though they are not as adjustable as a Magnum and don't have temp. compensation, they still do a good job of keeping batteries well charged.


Lew Farber
RVIA/RVDA Nationally Certified Master Tech
Master Tech Energy Systems, Inc.
AM Solar Certified Installation Center
Lifeline Batteries**Magnum Inverters
541-490-6357

Are the PD converters adjustable at all?
__________________
Tincampers is offline   Reply With Quote
Old 11-30-2015, 01:25 PM   #11
Rivet Master
Commercial Member
 
lewster's Avatar
 
Vintage Kin Owner
Naples, FL , Hood River, OR
Join Date: Dec 2005
Posts: 7,281
Not to my knowledge. They do follow a 3-stage charging profile with acceptable but not ideal voltage set points for Lifeline AGM batteries though.


Lew Farber
RVIA/RVDA Nationally Certified Master Tech
Master Tech Energy Systems, Inc.
AM Solar Certified Installation Center
Lifeline Batteries**Magnum Inverters
541-490-6357
__________________

__________________
Lew Farber...ABYC Certified Master Marine Electrician...RVIA Certified Master Tech ...AM Solar Authorized Installation Center...AIRSTREAM Solar & Electrical Specialist...Micro Air 'Easy Start' Sales and Installations
lewster 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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Silly Question kamadeca General Interior Topics 3 01-28-2014 08:23 AM
Ask a silly question... thewolffman On The Road... 5 12-30-2013 01:30 AM
Gaucho? Silly newbie question egad Airstream History 4 05-18-2012 08:25 PM
quick silly question! EoinmcCabe Buyer Guidelines 5 02-05-2010 08:17 AM
silly ball height question. AV8 Hitches, Couplers & Balls 7 11-09-2003 06:32 PM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 06:07 PM.


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.