Go Back   iRV2 Forums > TRAVEL TRAILER, 5th WHEEL & TRUCK CAMPER FORUMS > Travel Trailer Discussion
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 04-03-2014, 03:44 PM   #1
Junior Member
Join Date: May 2012
Posts: 18
New Solar System Questions

Have Tristar 45 PWM and Trimetric with 2 6 volt Trojans ... installed yesterday ... cloudy today ... I don't think it has gotten through a full charge cycle yet ... readings this morning on remote Tristar panel says 15.2 v 51 deg F 1.1 a 17 w and pwm 14% ... seems it is holding the 14.8 v absorption voltage ... but not enough sun to finish the job ... what does the pwm 14% mean ... the manual does not talk about what happens on cloudy days ... the only loads on the trailer at the Trimetrics and the Tristar controller and monitor ... would like to better understand what is going on ... John

jfinet is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 04-03-2014, 04:26 PM   #2
Senior Member
87Rockwood's Avatar
Vintage RV Owners Club
Join Date: Apr 2012
Location: Looking here and there.
Posts: 742
PWM=Pulse Width Modulation. Think of it as a duty cycle.

87Rockwood is offline   Reply With Quote
Old 04-03-2014, 04:50 PM   #3
Senior Member
vsheetz's Avatar

Fleetwood Owners Club
Ford Super Duty Owner
Join Date: Jun 2012
Location: SoCal
Posts: 12,936
You are correct. It's 14% through the absorption portion of the charge cycle. First was bulk, then moved to absorption mode. If cloudy not enough sun to complete the absorption portion and top off the batteries. You finished bulk portion so that is good.

There is a diagram in the manual that shows the modes and order they occur.

From your voltages sounds like you have it configured properly for the Trojan wet batteries. This is a good thing. Many folks don't and don't get the full potential from these batteries.

Excellent solar charge controller. I have the. 60a version with 600-800w of panels.
Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.
vsheetz is offline   Reply With Quote
Old 04-07-2014, 12:05 PM   #4
Senior Member
kekker's Avatar
Join Date: Apr 2012
Location: West Jordan, Utah
Posts: 203
how does that compare to a 45 Watt Panel?
kekker 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
Solar Installer in Orange County California twohsieh Going Green 25 11-08-2014 10:57 PM
Solar Power maryfaye Boondocking 64 09-10-2014 10:12 AM
Solar advice needed please RonInFlorida Going Green 23 04-15-2014 09:19 AM
Solar help please GSGracie RV Systems & Appliances 10 03-15-2014 03:48 PM
Essex keypad replacement questions RonD1 Monaco Owner's Forum 10 02-24-2014 08:49 AM

» Featured Campgrounds

Reviews provided by

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 04:04 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.