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07-30-2016, 01:00 PM
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#1
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2 Rivet Member
2013 25' FB Flying Cloud
Prescott
, Arizona
Join Date: Feb 2013
Posts: 24
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Solar Trickle Charger Hook-Up
I just purchased a solar trickle charger capable of 4 Watts per hour, 267mA per hour. I purchased at the same time, a cigarette lighter socket with a foot or so of wire behind it.
My plan is to wire the socket into the batteries in the battery box and just leave it there. When my AS is parked, I'll plug the solar charger in, set it out from under the cover where my AS is stored, and I'll be able to quit pulling the batteries and keeping them on a shore trickle charger in the garage.
My question is the proper hook-up. Obviously, there are two batteries in the battery box, wired in parallel (based upon what I dimly remember about electrical theory in school, maybe series?).
If I put connectors on the end of the pigtail out of the socket, should I connect both to one of the batteries or the positive on one and the negative on the other battery?
__________________
Chuhhuniban - Grey Coyote (Tohono O'odham)
A late convert to Airstreaming after 30 years of white boxes and motorhomes, now we have the Tin Twinkie.
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07-30-2016, 02:20 PM
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#2
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2 Rivet Member
Currently Looking...
Spring Hill
, Florida
Join Date: Sep 2006
Posts: 31
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If you have 2 - 12v batteries in parallel, then connecting to the + and - on one will be ok to get charge current to both.
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07-30-2016, 07:07 PM
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#3
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Rivet Master
Commercial Member
2012 25' FB Flying Cloud
Celina
, Ohio
Join Date: Jul 2010
Posts: 542
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Where did you buy this solar trickle charger?
Gary
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07-30-2016, 07:19 PM
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#4
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Rivet Master
1967 17' Caravel
Oak Creek
, Colorado
Join Date: Jul 2009
Posts: 1,560
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Quote:
Originally Posted by castaway
where did you buy this solar trickle charger?
Gary
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x2.
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07-30-2016, 10:13 PM
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#5
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2 Rivet Member
2013 25' FB Flying Cloud
Prescott
, Arizona
Join Date: Feb 2013
Posts: 24
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From Solarforceproducts.com. Canadian company,
__________________
Chuhhuniban - Grey Coyote (Tohono O'odham)
A late convert to Airstreaming after 30 years of white boxes and motorhomes, now we have the Tin Twinkie.
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07-31-2016, 08:07 AM
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#6
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Randy
2015 27' FB International
Portland
, Oregon
Join Date: May 2015
Posts: 39
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Love my BatteryMinder Model SCC-016. Bought off Amazon. Easy install.
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07-31-2016, 09:18 AM
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#7
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3 Rivet Member
2013 25' FB International
Liberty Corner
, New Jersey
Join Date: Mar 2014
Posts: 209
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Since the batteries are wired in parallel, connect to the (+) on one and the (-) on the other to make sure that both are equally subjected to the charging.
On a related note, I also thought that I could just use a solar trickle charger when in storage. So I went and purchased the ZAMP trickle charger through an AS dealer and hooked it up to the existing ZAMP side port for my other ZAMP panels. After a few weeks I found the batteries to be too low a voltage to operate anything. I believe that I had just owned the trailer for less than a year. In my case it was next to impossible to determine anything about the charging circuit since it was just a brick with no data port. I ended up recording the battery voltage over time with and without the charger and determined that while the charger was working, the batteries were bad. The AS dealer replaced them and then the solar trickle charger worked just fine. I now keep the trailer in a barn with power so I use a battery Minder (until I install a Magnum inverter) and moved the ZAMP solar trickle charger to an old Super C in building with no power.
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07-31-2016, 12:22 PM
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#8
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2 Rivet Member
2013 23' Flying Cloud
Naples
, Florida
Join Date: Jun 2015
Posts: 97
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battery tenders
Quote:
Originally Posted by Randyf22
Love my BatteryMinder Model SCC-016. Bought off Amazon. Easy install.
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Might you have purchased your Model SCC-016 a while ago? I can't find that model on Amazon or even the general web, so I can't compare its features to the current (pun intended) Battery MINDers.
Also--when you say "easy install", does that mean a blondenon-techiewhoisafraidofelectricity can do it?
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08-01-2016, 04:05 PM
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#9
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2 Rivet Member
2013 25' FB Flying Cloud
Prescott
, Arizona
Join Date: Feb 2013
Posts: 24
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Error in my previous post: It's "sunforceproducts.com" not solar. Sorry.
__________________
Chuhhuniban - Grey Coyote (Tohono O'odham)
A late convert to Airstreaming after 30 years of white boxes and motorhomes, now we have the Tin Twinkie.
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08-01-2016, 04:59 PM
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#10
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65th Anniversary CLIPPER
1996 36' Clipper Bus
Tub City
, British Columbia
Join Date: May 2009
Posts: 3,309
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As stated above, if you have 2 x 12 volt batteries, on a 12 volt system, connect the + to one and the - to the other to allow the charge to pass through both batteries.
When you connect your solar feed, use some dielectric grease so that the terminals will remain clean with good conductivity.
If you have that small a panel, you don't want too long a feed line to the trailer batteries?
And yes, keep a watch on the system for a couple months to make sure it is doing what it is expected to do.
Considering where you are in the off season, your panel may hardly replace the parasitic loss that would happen overnight?
Dave
__________________
"LOVE and LOSS, are two of the greatest emotions one can experience. -- I went to school to learn about "WHAT GOES UP MUST COME DOWN" but I had to live my life to learn the lesson of: 'WITH LOVE THERE WILL BE SORROW'."
David Stewart. (after loosing my NAVIGATOR)
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