How to check Polarity on the Bushwackers Solar Port (SAE Port)

Just a quick vid on how to check the polarity on the SAE port mounted on the side of the Bushwacker. When connected a solar panel, its best to verify the polarity of the line coming in to the battery.
You can find links to all the items I use on my trailer, at OutdoorTxs.com under Gear / Camping.
Feel free to comment below if you have any questions.
Thanks !

[@cdawgRJ]

This is the best video! Easy to understand and very detailed. I was always so confused when people would tell me to check polarity. Thank you

[@OutdoorTXs]

Glad it helped!

[@cdawgRJ]

This is amazing. Exactly what I needed to know. Thank you

[@OutdoorTXs]

Glad it was helpful!

[@deanhenthorn1890]

I always use MC4 connectors. Why doesn’t solar panels have red + wires and black - wires is beyond common sense. In fact I made my own polarized connection tool to check the solar panel output before installing it on the charge controller.

[@OutdoorTXs]

@@deanhenthorn1890 I'm also a fan of MC4 for solar, but this trailer comes prewired with the SAE. I believe it's prewired for zamp solar, which is reversed polarity compared toost others. I'm interested in your connection tool tho! Sounds awesome

[@deanhenthorn1890]

Change the MC4 connectors on your adapter cable to match the trailer port red positive and black negative pins. No need to have the additional polarization adapter which will only cause problems.

[@deanhenthorn1890]

@@OutdoorTXs I bought a SAE solar connection kit from Harbor Freight with various connectors options , one was an SAE with a LED bulb molded in a plastic housing. It got me thinking, so I replaced the factory SAE with MC4 connectors. I can confirm each individual panel is correct polarity. When adding multiple panels to make a Series setup, the voltage increases while the current remains constant. This got me thinking about buying a MC4 type tester. However I can’t find one so I made my own. Using OHMS law online calculator, I was able to determine the correct resistor needed. I purchased a resistor, a set of MC4 connectors and a LED bulb I made my own polarity tester that meets the requirements of my solar panel’s electrical setup. An LED bulb is polarized which will only allow current to move in one direction. Now I have a tool to check for correct polarity before connecting to the charge controller in my system, or in your case the RV connection. I understand that this is a tool that depends upon the number of panels (I have 7 100watt panels), but I’m not an electrical engineer so my tool works for me. Maybe you can make one for your needs! I like the video!