Solar expectations - panel output seems low - Page 2 - Fiberglass RV


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Old 06-26-2012, 02:47 PM   #15
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How does the charge control metering get affected when I'm plugged into AC and the battery is charging from the AC/DC converter? Or from the TV alternator.

Seems the controller should have a "alternate power source" or something like that.

Because if I'm using a mix as 12v sources seems like all my charging data will be worthless. Perhaps the usage data will still be useful.
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Old 06-26-2012, 03:08 PM   #16
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Originally Posted by dylanear View Post
How does the charge control metering get affected when I'm plugged into AC and the battery is charging from the AC/DC converter? Or from the TV alternator.

Seems the controller should have a "alternate power source" or something like that.

Because if I'm using a mix as 12v sources seems like all my charging data will be worthless. Perhaps the usage data will still be useful.

Battery charging from multiple sources is not a problem. Only one source will actually be charging the battery, everybody else will think the battery is fully charged. When the battery does get fully charged all will think it's fully charged and stop charging.
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Old 06-26-2012, 03:23 PM   #17
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Originally Posted by dylanear View Post
How does the charge control metering get affected when I'm plugged into AC and the battery is charging from the AC/DC converter? Or from the TV alternator.

Seems the controller should have a "alternate power source" or something like that.

Because if I'm using a mix as 12v sources seems like all my charging data will be worthless. Perhaps the usage data will still be useful.
Byron is right in regards to charging. However, charge controller monitor will not know how many amphours went back to the battery unless converter is wired into electronic guts of the solar charge controller, personally, I would not pursue this route. The solar charge controller will be able to see the battery voltage changes but it will be able to measure current flowing into the battery from the convertor.

George.
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Old 07-04-2012, 12:46 PM   #18
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Did some more troubleshooting today and the conclusion is the Bargman trailer umbilical is my problem. When I use that to connect the charge controller to the battery, the amps top out at about 1.2.

If I connect directly from the charge controller to the battery with about 2' of 10 gauge wire, I see 5.2 amps charging the battery.

Any ideas why the Bargman connector method is so poor - it is a 13' 2012 scamp so the umbilical can't be that long. Almost seems like maybe the way they have the Bargman tied into the trailer that there is some current limiting going on (maybe so that it doesn't draw too much from the vehicle when connected?).

Wish I would have known that before special ordering the Bargman connector and chopping a big hole in the side of this nice pelican box. Seems like I'm starting over now with a strategy for connectors and housing the controller.

Oh well, I'm thrilled the panel and controller are working fantastic.
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Old 07-04-2012, 04:37 PM   #19
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Byron is right in regards to charging. However, charge controller monitor will not know how many amphours went back to the battery unless converter is wired into electronic guts of the solar charge controller, personally, I would not pursue this route. The solar charge controller will be able to see the battery voltage changes but it will be able to measure current flowing into the battery from the convertor.

George.
I think you are correct. Too bad the controller doesn't have a second input beside the solar input, a "other charge sources" input that the TV, AC/DC and generator could be attached to.
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