Forum Discussion

steveh27's avatar
steveh27
Explorer
Jul 13, 2015

portable solar help

http://www.amazon.com/Infomon-Monocrystallline-Portable-Folding-Solar/dp/B005WMD8VY/ref=cm_cr-mr-title

I've had this 120 watt portable panel for a few years & rarely need to use it. When I first tried it in optimum conditions it approached the listed 6.6 amps output. But that was using the battery clamp hookups. As my battery is under the entrance step the clamp setup gets in the way.

So I bought this:
http://www.amazon.com/gp/product/B0022ZZULK?psc=1&redirect=true&ref_=oh_aui_detailpage_o09_s00

I then hooked that quick disconnect up to the battery & trimetric shunt for my meter, and have it exit the battery box outside under my entrance step for an easy QD hookup. I made an 18' quick disconnect cord out of 10 ga wire.

Since then, the few times I've tried it I've never reached 4 amps output.

Today it's hazy & getting cloudy so not optimum, but I tried both hookups;
with the clamps & using the quick disconnects (QD). My trimetric meter said the clamps gave 2.6 amps while the QD gave 1.6 amps.

SO does this mean the QD battery hookup is losing amps? It is 16 ga., but only 16".

What can I do to make the QD work as well as the clamps?

I've also thought about getting the Solar 30 cc as it's adjustable. I know it's better to have the cc close to the battery & not on the panel as mine is, but there is not much room in my battery area.

29 Replies

  • Lots of space next to the propane regulator. I would drop the wire out the bottom or side to keep the battery compartment closed. Likely use an Anderson style connector. #10 wire minimum.

    MrWizard, yes wire size and distance are interchangeable.
  • It's amazing how short the wiring run suggestions are getting

    Now down to 18" from controller to battery
    This it's not a practical distance for most solar installs, even in RVs
    No way to get that close in my RV
    Even if I mounted it on the bedroom floor of the closet it would still be at least four feet from the BATTERIES

    Yes 16ga wire is TO small..
    Yes the qd is a nice idea but you need much larger wire

    Think of it like this
    If you used a reducer and connected a 1/2" water pipe to a 2" water line.. do you think you could still fill the swimming pool at the same rate of water flow..as the open ended 2" pipe
  • smkettner wrote:
    When connected and charging... what is the voltage at the controller output terminals vs the battery?


    With which hookup method? The trimetric shows both methods at 13.2 - 13.4 v at the battery. With the clamp cable it was 13.5 at the cc.
  • When connected and charging... what is the voltage at the controller output terminals vs the battery?
  • The battery showed 78% soc on the trimetric when I started this test.

    SMK, I know the cc is better close to the battery, but as mentioned it is mounted on the back of the panel, the way it came. As that didn't change when the output dropped that would not be the cause of the output drop. I wish I had a way to mount a cc by the battery but there isn't much room. I'll try to post a pic of the batt box.

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