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Old 09-06-2017, 03:21 PM   #1
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2001 30' Limited
1973 31' Sovereign
Livingston , Texas
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7 pin reverse polarity?

Hi!

I just received my new portable solar charger that connects to my batteries via the 7 pin connector.

If I don't use the 7 pin connector and hook the solar charger directly to one of the batteries via the included alligator clips, everything is working as it should.

If I DO use the 7 pin connector to connect the charger to the batteries (a huge time saver for my setup), the charger receives reverse polarity and gives me an error.

Wondering if there is a problem with my connector and if there is a quick fix to reverse polarity somewhere in the line? I've read about a few issues with polarity but, honestly, the responses when a little over my head.
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Old 09-06-2017, 04:33 PM   #2
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Hi

The polarity on the 7 pin connector is very well defined. If it goes to a two pin connector from there, you have about a 50/50 chance of it being correct. For reasons nobody can really work out, there is no standard pinout in the solar world for the two pin connector. The rest of the world seems to have a standard. The solar guys don't always follow it....

Simple answer: swap the wires going to the 2 pin connector (if that's what you have).

Bob
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Old 09-06-2017, 05:08 PM   #3
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Uncle_bob, you the man. Seems simple now that you say it, but that trick worked.

I took apart the 7pin adapter from the solar company (GoPower, if you're interested) and reversed the polarity. Everything golden now.

Thanks again!
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Old 09-06-2017, 05:45 PM   #4
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Hi

Glad it worked. It's a mystery to me why they can't agree on a standard ....

Bob
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Old 09-07-2017, 10:34 PM   #5
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I think the design is in the nature of the beast. On the output side you need an insulated positive pin to prevent shorts. However, that depends on which way the current flows. On the input side you would need an insulated negative pin because the flow is reversed. So, are you talking about input or output. Both sides could be either. If you did not have a diode and an error light, you would get a short. So your reasoning is right, just reverse the connection. Recently, we had a big discusion on which way electrons flow, but a bright flash is an "Iron Clad" clue. Just add propane, and BINGO! So be careful.
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Old 09-10-2017, 10:24 AM   #6
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7 pin connector

Our original equipment connector had the pin #'s printed on the rubber, but making a sharp U turn a couple of years ago, I cut the umbilical cord & the replacement is not numbered. Any suggestions where I can find the correct #'s so I can use my jumper to turn on the running lights when connected to shore power? I think remember #3 & 7?
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Old 09-11-2017, 07:48 AM   #7
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Quote:
Originally Posted by ghamr View Post
Our original equipment connector had the pin #'s printed on the rubber, but making a sharp U turn a couple of years ago, I cut the umbilical cord & the replacement is not numbered. Any suggestions where I can find the correct #'s so I can use my jumper to turn on the running lights when connected to shore power? I think remember #3 & 7?
Hi

Mr Google is your friend. Next step often involves a multimeter or some guessing.

https://www.etrailer.com/question-43690.html

Bob
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