Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×

Thread Tools Search this Thread Display Modes
Old 03-20-2003, 08:42 AM   #1
New Member
Join Date: Mar 2003
Posts: 3
Send a message via Yahoo to soultrip11
has anyone measured phantom loads?

I am getting ready to do my power calculations for an '03 Bambi. Has anyone measured the actual phantom loads on their rigs? What is your trailer and what have you found? (refer, clock, LP detector, water heater, tank gages...)
soultrip11 is offline   Reply With Quote
Old 03-20-2003, 10:21 AM   #2
Silvertwinkie's Avatar
2004 25' Safari
. , Illinois
Join Date: Feb 2003
Posts: 10,475

Check this post out, it has some load calculations and great info on solar and generators too.


Silvertwinkie is offline   Reply With Quote
Old 02-24-2005, 08:21 AM   #3
Rivet Master
Join Date: Dec 2002
Posts: 1,335
Images: 4
I recently installed a Trimetric 2020 meter to monitor battery voltage, amperage, amp-hours remaining, and several other useful parameters of our two group 27 batteries. The meter is made by Bogart Engineering, and I purchased it through Back Woods Solar at as a kit for $190. I will shortly fit the optional lightning protector. These were very helpful people, and the install went without a hitch. I used the 100 amp shunt for greater accuracy than with the 500 amp shunt. I consider it an excellent instrument. Prior to buying the meter, I noticed that the two batteries would only last about 4 days when not attached to 120 v shore power, even when the trailer was unoccupied, and only the refrigerator was running, but on propane. Using the Trimetric 2020 I found that the current drain in the 1988 Excella was 1.30 amps. At 31.2 amp-hours a day, and reckoning on about 50 usable ah from each battery, then they would clearly be run down after 3 days. I traced the consumption of 1300 milliamps by switching off one appliance at a time. The results were:
Charging cellphone 70 ma
Climate control on Dometic refrigerator (forgot to switch off!) 490 ma
Refrigerator without climate control 310 ma
(Refrigerator with climate control therefore 800 ma)
Propane detector 40 ma
Jensen radio on standby 230 ma
Display panel over front couch 130ma
Trimetric 2020 meter 30 ma (16 ma with display off, according to the manual)

These total 1300 ma, and I will be taking steps to reduce this total. Remembering to switch off the climate control would be the easiest fix. I will be looking at fitting switches to the radio and the display panel. This has the disadvantage that clocks and selected wavelengths will need to be reset. I will also use the tow vehicle battery when I need to charge the cellphone when boondocking. I will investigate the feasibility of running the refer in limp mode, with battery power disconnected. Other intermittent loads were:
1 incandescent 1141 bulb light 1370 ma (Compact fluorescents are on the to-do list!)
Water pump 4100 ma
Furnace 6470 ma
12v TV 2400 ma
Radio on 70 ma
Stove vent fan 1650 ma
Bathroom vent fan 2250 ma.

I recommend the Trimetric 2020 meter. Used in conjunction with an Intellipower 60 amp charger and Charge Wizard, its ability to monitor amp-hours remaining as well as current and voltage gives me the knowledge I need to maintain and use the batteries.Nick
Nick Crowhurst, Excella 25 1988, Dodge Ram 2500 Cummins Diesel. England in summer, USA in winter.
"The price of freedom is eternal maintenance."
nickcrowhurst is offline   Reply With Quote

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
Chassis/House Battery Charging 4 Motorhomes Jim Tyrney Airstream Motorhome Forums 41 03-11-2011 06:50 PM
How is a Airstream measured for length? treadsowell Our Community 4 07-02-2003 01:07 AM
How are Airsteams measured ? oldvws Our Community 8 11-27-2002 01:27 PM

Featured Campgrounds

Reviews provided by


This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.

All times are GMT -6. The time now is 11:33 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.