RV News RVBusiness 2021 Top 10 RVs of the Year, plus 56 additional debuts and must-see units → ×

Thread Tools Search this Thread Display Modes
Old 03-01-2014, 06:45 PM   #1
Rivet Master
drboyd's Avatar

1978 25' Tradewind
Metro Phoenix , Arizona
Join Date: Jun 2003
Posts: 1,492
Solar addition to system with a multi-stage converter/charger

OK, so last year I took out the old Univolt and installed a new Progressive dynamics 9245 charge controller to manage the charging while I'm hooked up to 120/1/60.

This year, we're looking at more camping without an electrical hookup, and I'm thinking about solar with an MPPT charge controller. Everything I know about electricity (which you could write on the bottom of my shoe with a can of spray paint) tells me that the 120 volt charge controller and the solar charge controller just connect to the battery in parallel.

Seems like it would probably not be a good idea to have the solar and the shore power feeding into the battery at the same time... that might let some smoke out of something.

Is there anything else I need to know, do, or buy?
"Between what matters and what seems to matter, how should the world we know judge wisely?" - E.C. Bentley, Trent's Last Case
drboyd is offline   Reply With Quote
Old 03-01-2014, 06:59 PM   #2
Rivet Master
1974 Argosy 20
2014 20' Flying Cloud
Kooskia , Idaho
Join Date: Jul 2009
Posts: 4,591
The 120 volt converter/charger and any solar charge controller are indeed simply connected to the battery together. When both are operating (line power connected) and the sun is shining, once the battery voltage increases to the charged condition, both will regulate down and not overcharge the battery.

So, no problem with them both connected and on at the same time. You won't let the smoke out.
idroba 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
Airstream solar pre-wiring compatibility with AM solar robi Electrical - Systems, Generators, Batteries & Solar 6 06-11-2014 10:31 PM
2009 Airstream 19' Bambi Flying Cloud Travel Trailer With Solar Charging System eBay Watch Airstreams on eBay 0 10-15-2011 10:30 AM
Solar system questions Getahobby Generators & Solar Power 1 10-05-2011 10:43 PM
See-Level system installed crispyboy Waste Systems, Tanks & Totes 9 07-05-2011 06:45 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 07:06 AM.

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