RV.Net Open Roads Forum: Tech Issues: features for dc to DC chargers

RV Blog

  |  

RV Sales

  |  

Campgrounds

  |  

RV Parks

  |  

RV Club

  |  

RV Buyers Guide

  |  

Roadside Assistance

  |  

Extended Service Plan

  |  

RV Travel Assistance

  |  

RV Credit Card

  |  

RV Loans

Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Posting Help and Support  |  Contact  

Search:   Advanced Search

Search only in Tech Issues

Open Roads Forum  >  Tech Issues

 > features for dc to DC chargers

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 3  
Next
Sponsored By:
pianotuna

Regina, SK, Canada

Senior Member

Joined: 12/18/2004

View Profile


Offline
Posted: 01/11/21 10:24am Link  |  Quote  |  Print  |  Notify Moderator

Hi,

What features should one look for in such a device?


Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp hours of AGM in two battery banks 12 volt batteries, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.

2oldman

south

Senior Member

Joined: 04/15/2001

View Profile


Offline
Posted: 01/11/21 10:38am Link  |  Quote  |  Print  |  Notify Moderator

My main concern was amperage. Enough to run my slides. But, mine's just a converter.. I'm not sure I'm talking about what you're talking about.

* This post was edited 01/11/21 11:33am by 2oldman *

BFL13

Victoria, BC

Senior Member

Joined: 02/15/2006

View Profile



Posted: 01/11/21 12:04pm Link  |  Quote  |  Print  |  Notify Moderator

Been some threads on this. One thing that came up was to have one that is buck/boost where some new charging systems let the starting batt run too low at 12.x and at times it is too high at 15.x.

They are programmable, so the first thing is to know what you need yours to do, then see if a particular model will do that.


1. 1991 Oakland 28DB Class C
on Ford E350-460-7.5 Gas EFI
Photo in Profile
2. 1991 Bighorn 9.5ft Truck Camper on 2003 Chev 2500HD 6.0 Gas
See Profile for Electronic set-ups for 1. and 2.

theoldwizard1

SE MI

Senior Member

Joined: 09/07/2010

View Profile


Offline
Posted: 01/11/21 12:32pm Link  |  Quote  |  Print  |  Notify Moderator

BFL13 wrote:

One thing that came up was to have one that is buck/boost where some new charging systems let the starting batt run too low at 12.x and at times it is too high at 15.x.

If a DC-DC charger can NOT boost a voltage from <13V then it is useless ! Protection from overvoltage is a bonus as is discharge of the RV battery.

theoldwizard1

SE MI

Senior Member

Joined: 09/07/2010

View Profile


Offline
Posted: 01/11/21 12:37pm Link  |  Quote  |  Print  |  Notify Moderator

pianotuna wrote:

What features should one look for in such a device?


• Wide input voltage range (maybe 11.0V - 15.0V)
• Programable for multiple battery types (flooded lead acid, AGM, LiFePO4 and ?)


Bonus (low priority) would be a way to use the RV battery to boost the engine start battery, but that would have to go through the fuse in the vehicle so that would be the limitation.

theoldwizard1

SE MI

Senior Member

Joined: 09/07/2010

View Profile


Offline
Posted: 01/11/21 12:40pm Link  |  Quote  |  Print  |  Notify Moderator

2oldman wrote:

My main concern was amperage. Enough to run my slides.

The power to run your slides is going to come from the RV batteries. If you do not have a RV battery, I doubt that these chargers would be able to run the slides.

If the batteries are heavily discharged, you will have to run the vehicle engine for some time (15-30 minutes ?) to charge those batteries and operate the slides.

time2roll

Southern California

Senior Member

Joined: 03/21/2005

View Profile



Good Sam RV Club Member


Posted: 01/11/21 12:47pm Link  |  Quote  |  Print  |  Notify Moderator

Primary feature is amp rating. JMHO. Bigger is not always better and watch the input amps. The rating is output.


2001 F150 SuperCrew
2006 Keystone Springdale 249FWBHLS
675w Solar pictures back up

theoldwizard1

SE MI

Senior Member

Joined: 09/07/2010

View Profile


Offline
Posted: 01/11/21 01:20pm Link  |  Quote  |  Print  |  Notify Moderator

Interesting video !

"It is possible to damage your AGM or LiFePO4 batteries charging them from an engine alternator."

Renogy DC-DC Battery Charger Review: "Smart" Alternator Charging

2oldman

south

Senior Member

Joined: 04/15/2001

View Profile


Offline
Posted: 01/11/21 01:34pm Link  |  Quote  |  Print  |  Notify Moderator

theoldwizard1 wrote:

2oldman wrote:

My main concern was amperage. Enough to run my slides.
The power to run your slides is going to come from the RV batteries.
Sorry... OP knows I have a 48v battery.

pianotuna

Regina, SK, Canada

Senior Member

Joined: 12/18/2004

View Profile


Offline
Posted: 01/11/21 02:18pm Link  |  Quote  |  Print  |  Notify Moderator

2oldman,

Yes I knew you have a 48 volt battery.

Does your existing converter allow you to run the slides? I'm assuming you are running the converter from an inverter?

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 3  
Next

Open Roads Forum  >  Tech Issues

 > features for dc to DC chargers
Search:   Advanced Search

Search only in Tech Issues


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:




© 2021 CWI, Inc. © 2021 Good Sam Enterprises, LLC. All Rights Reserved.