RV.Net Open Roads Forum: Tech Issues: Dedicated Battery to power cooler, solar re-charged

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

 > Dedicated Battery to power cooler, solar re-charged

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 2  
Prev
Sponsored By:
obiwancanoli

Napa

Senior Member

Joined: 02/13/2018

View Profile



Good Sam RV Club Member

Offline
Posted: 07/15/21 12:21pm Link  |  Quote  |  Print  |  Notify Moderator

Thanks

CA Traveler

The Western States

Senior Member

Joined: 01/03/2004

View Profile


Offline
Posted: 07/15/21 07:40pm Link  |  Quote  |  Print  |  Notify Moderator

You usage is not obvious: a few hours, 24/7, etc. The SUV plug can power the refer but not battery charging. You'll need larger SUV wiring and/or a DC-DC converter and both have losses. Plus some newer vehicles don't fully charge the vehicle battery - rather reduced charging to help with the EPA mileage. In addition the alternator and vehicle battery are close which is part of the charging design. A remote battery - thinking in the back - ie the starting battery is charged while the remote battery not so much.

Consider a DC-DC converter that can be set for Li or AGM or whatever battery type and alternator load.


2009 Holiday Rambler 42' Scepter with ISL 400 Cummins
750 Watts Solar Morningstar MPPT 60 Controller
2014 Grand Cherokee Overland

Bob


wa8yxm

Davison Michigan (East of Flint)

Senior Member

Joined: 07/04/2006

View Profile


Offline
Posted: 07/16/21 04:32am Link  |  Quote  |  Print  |  Notify Moderator

Setting up a solar system is very straight forward

Solar panel----Solar Controller----Battery----Load (See note)

The load may also be connected to the controller depending on the max current draw.. The configuration above is in my "Living room" running a radio.
It is the one the battery maker suggested

I would recommend a LiFePo4 battery for reasons including the one you stated.

Advantage of connecting load to controller: Low voltage protection
Advantage of LiFePo4.. You might not need low voltage protection

Disadvantage of solar: If battery is not big enough cooler may cease to cool due to low voltage. This happens with LiFePo-4 very late in the discharge cycle (like below 10%)


Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times


mr_andyj

Georgia

Senior Member

Joined: 11/13/2004

View Profile



Posted: 07/17/21 10:00am Link  |  Quote  |  Print  |  Notify Moderator

Mount the battery close to the fridge. Run the fridge to the battery to get power. Super easy.
For charging use a solar charge controller connected to your new solar panel.
Also, connect it to the vehicle alternator for when you drive. Use a solenoid switch so it is electrically connected to the alternator/starting battery when the motor is running and when ignition is off the switch turns off. Hint, you can use the radio ignition power feed to tell the solenoid switch when the vehicle is on/off.

For charging off of shoreline you can put a switch to connect it to the coach batteries that are being charged, or you can add a new charger just for your fridge battery, and when it is powered from shoreline it will charge.

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 2  
Prev

Open Roads Forum  >  Tech Issues

 > Dedicated Battery to power cooler, solar re-charged
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:




© 2022 CWI, Inc. © 2022 Good Sam Enterprises, LLC. All Rights Reserved.