Solar/Shore power interaction? - Escape Trailer Owners Community

Go Back   Escape Trailer Owners Community > Escape Tech > Escape Systems | Water, Waste, Charging & Propane
Click Here to Login
Reply
 
Thread Tools Display Modes
 
Old 05-14-2016, 10:22 AM   #1
Senior Member
 
thoer's Avatar
 
Join Date: Oct 2009
Location: Galesville, Wisconsin
Trailer: 2017 21 "Blue II" & 2017 Highlander XLE (previously 2010 17B "Blue" & 2008 Tacoma)
Posts: 3,961
Solar/Shore power interaction?

I'm wondering what the interaction is between the solar controller and the charger built into the converter is when the trailer is plugged into shore power? Is there something in the solar controller that senses the charge from the converter and shuts down or vice versa? It would seem that if both were operating simultaneously that too much current/voltage would be applied to the batteries.
__________________

__________________
Eric (and Mary who is in no way responsible for anything stupid I post)

SAE Towing Standard "Beware of false knowledge; it is more dangerous than ignorance." George Bernard Shaw
thoer is offline   Reply With Quote
Old 05-14-2016, 10:38 AM   #2
Senior Member
 
padlin's Avatar
 
Join Date: Sep 2009
Location: Southwick, Massachusetts
Trailer: 5.0 TA #6, 2012 F150 EB
Posts: 3,846
To my understanding it's the voltage level. When the converter is charging the voltage is something like 13.7 volts, which is enough to cause the solar controller to not output.

My controller charges at up to 15.3v, I've never seen above the 13.7+/-, when charging via the converters charger.

Let's see what others say.
__________________

__________________
Happy Motoring
Bob
padlin is offline   Reply With Quote
Old 05-14-2016, 10:39 AM   #3
Senior Member
 
thoer's Avatar
 
Join Date: Oct 2009
Location: Galesville, Wisconsin
Trailer: 2017 21 "Blue II" & 2017 Highlander XLE (previously 2010 17B "Blue" & 2008 Tacoma)
Posts: 3,961
Thanks Bob. That makes sense.
__________________
Eric (and Mary who is in no way responsible for anything stupid I post)

SAE Towing Standard "Beware of false knowledge; it is more dangerous than ignorance." George Bernard Shaw
thoer is offline   Reply With Quote
Old 05-14-2016, 05:06 PM   #4
Senior Member
 
Join Date: Dec 2012
Location: Edmonton, Alberta
Trailer: 1979 Boler B1700
Posts: 9,055
I agree with Bob. Neither of the charging devices have any way to know what is connected to the battery or what those connected devices are doing. They should measure the net current through the battery to properly manage the battery charge, but they don't, so they have no idea whether or not it is being charged. Both of them just act based on the voltage they see: low voltage means they need to charge at a set rate of current flow, higher voltage means they need to limit that voltage according to some rule, and high enough voltage means shut down because the battery is charged.

Because the two chargers are set to different charging profiles, one will typically keep the other from operating as intended.

To make everything work just a little worse, both chargers base their control on the voltage they see at their own outputs, which is different from battery voltage by an amount dependent on wire resistance and current flow from that charger, so neither one is doing exactly what it is intended to do.

This isn't unique to Escape at all - it is the normal reality of common solar charge controller and common RV converter/chargers.
Brian B-P is offline   Reply With Quote
Old 05-14-2016, 05:24 PM   #5
Senior Member
 
fudge_brownie's Avatar
 
Join Date: Nov 2008
Location: Janesville, WI, Wisconsin
Trailer: Escape 19 (sold) Escape 21 2014
Posts: 1,227
I would agree with Bob, my measurements are the same. The recommendation then would be to unplug from shore power when wanting a full charge. Why?

Since the WFCO will only charge your batteries at 13.7 volts it will take days to get a full charge, if at all. For the dual Interstate 6 volts a full charge is 15.3 for two hours. Something few achieve because there are a very limited number of chargers able to charge at those rates.

The Gopower solar controller that Escape used to use did a much better 14.4 volt charge, if and only when you are disconnected from shore power. I am not familiar with the Samlex now being used to know its voltage.

So, given a choice, disconnect from shore power to get the best charge. If you only have the WFCO to charge, so be it, you just leave home without a full battery. Not an issue unless you are boon docking.
__________________
Paul and Janet Braun
2003 Toyota 4Runner V8 now 2012 Toyota Sequoia V8
Escape 19' 2010 now 2014 Escape 21'
fudge_brownie is offline   Reply With Quote
Old 05-14-2016, 07:13 PM   #6
Senior Member
 
thoer's Avatar
 
Join Date: Oct 2009
Location: Galesville, Wisconsin
Trailer: 2017 21 "Blue II" & 2017 Highlander XLE (previously 2010 17B "Blue" & 2008 Tacoma)
Posts: 3,961
Quote:
Originally Posted by fudge_brownie View Post
So, given a choice, disconnect from shore power to get the best charge. If you only have the WFCO to charge, so be it, you just leave home without a full battery. Not an issue unless you are boon docking.
Thanks Brian and Paul,

Paul, since at home I will be using the BatteryMinder and the trailer will be indoors in its shed, I should still be leaving home fully charged. One of these days also, I need to measure and see what voltage I get from the Highlander when connected. With the Tacoma, we always seemed to get back to full if our drives were a few hours or so,
__________________

__________________
Eric (and Mary who is in no way responsible for anything stupid I post)

SAE Towing Standard "Beware of false knowledge; it is more dangerous than ignorance." George Bernard Shaw
thoer is offline   Reply With Quote
Reply

Thread Tools
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






» Virginia Campgrounds

Reviews provided by



All times are GMT -5. The time now is 03:14 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 2012 Social Knowledge, LLC All Rights Reserved.