MC4 connectors for solar panels are 4mm diameter, or .157 inches, just barely too small to match with standard .176" bullet connectors. while I could barely jam a male bullet terminal into a female MC4, the male MC4 wouldn't make reliable contact with the female .176" terminal. so I had to cut open the MC4 bodies that the wire thieves left to retrieve the inner parts, and solder my new wires to them.
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last updated 2016-01-18 13:42:30. served from tektonic.jcomeau.com