Top Navigation  
 
U.S. Flag waving
Office Hours Momday - Friday  8 am - 5 pm Pacific 1-800-835-2418
 
Facebook   YouTube   Twitter
 
 
Backwoods Home Magazine, self-reliance, homesteading, off-grid

Features
 Home Page
 Current Issue
 Article Index
 Author Index
 Previous Issues
 Print Display Ads
 Print Classifieds
 Newsletter
 Letters
 Humor
 Free Stuff
 Recipes
 Home Energy

General Store
 Ordering Info
 Subscriptions
 Kindle Subscriptions
 ePublications
 Anthologies
 Books
 Back Issues
 Help Yourself
 All Specials
 Classified Ad

Advertise
 Web Site Ads
 Magazine Ads

BHM Blogs
 Ask Jackie Clay
 Massad Ayoob
 Claire Wolfe
 Where We Live
 Dave on Twitter
Retired Blogs
 Behind The Scenes
 Oliver Del Signore
 David Lee
 Energy Questions
 Bramblestitches

Quick Links
 Home Energy Info
 Jackie Clay
 Ask Jackie Online
 Dave Duffy
 Massad Ayoob
 John Silveira
 Claire Wolfe

Forum / Chat
 Forum/Chat Info
 Enter Forum
 Lost Password

More Features
 Meet The Staff
 Contact Us/
 Change of Address
 Write For BHM
 Disclaimer and
 Privacy Policy


Retired Features
 Country Moments
 Links
 Feedback
 Radio Show


Link to BHM

Get Powered Up! Certified Energy Manager Jeff Yago answers your alternative energy questions

Wondering about a great new energy-saving device
you found on the Internet? Then CLICK HERE!

Sorry. Jeff no longer answers questions online.
This will remain as a searchable
resource for all BHM website visitors.



Archive for the ‘Cargo van’ Category

 

Looking for heat in my cargo van

Wednesday, January 14th, 2009

Jeff,

I just recently found this website and I want to tell you I am impressed. Very informative !!

I am a expediter. I basically spend hours and hours, sometimes weeks out on the road at a time.

I  have a 2500 watt power inverter and I am getting ready to buy 2 6v golf cart battery and am considering buying a 120 watt solar panel from e-bay.

What I am trying to do is power my electric heater which is 1200 watt’s. Gasoline is too expensive to let the van run and propane is no different. I want to wake up alive and this is the safest way to go as far as I know.

Do you have any other suggestion’s or any past articles on safely heating my van?

Thank you,

Bill Weatherford

Bill:

If you check my last thousand replies you will find I keep telling people its not cost effective to power any electric heating device with solar electricity. For example using the numbers you give, your 1200 watt electric heater would run about 1 hour before totally discharging your 2 gold cart batteries, then it would take your single 120 watt solar module about 2 or 3 days to re-charge the batteries before you could again run the heater.

A 6-volt deep cycle battery stores about 1 kWh of power before totally discharged, which damages any battery. Two would gave you the same amount of power by safely discharging only to 50% discharged. You will get about 3 hours of full sun during winter days in most parts of the US due to the low sun angles and shorter days. Also a typical solar module will only put about 70 to 80% of its nameplate rating into the battery charge. 120 watts X 80% / 3 hrs/day = 288 watt-hrs per day, which requires 4 days to produce 1200 watts, and your heater requires this much power every hour it operates, so it will only run 1 hour before it uses up 4 days of solar charge.

Better buy electric socks and gloves!

Jeff Yago

 
 


 
 

 
 
 
 
 
Copyright © 1998 - Present by Backwoods Home Magazine. All Rights Reserved.