Based on product photos and other reviewers, I was expecting the polarity between the included cable and the wall mount to be annoyingly reversed. Surprisingly, however, someone in China found that it's better to pair red-to-red and black-to-black without adding the included polarity reversing adapter. Miracles never end. Looking through the sellers offering this product they all have the same issues which is why I bought it as it has the parts I need at a reasonable price. I use this product to solar power my basement where the battery is located. Next it will be installed. I'll update this if more problems arise.
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