yarachel 25Pairs / 50PCS Solar Connectors – Male & Female IP67 Waterproof Connector (25 Pairs Solar connectors)
Amazon.com Price: $21.89 (as of 09/04/2023 09:49 PST- Details)
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Solar Connector Conductor pin is tinned Copper: made of PPO + PA material, It makes a rock solid connection after you crimp the pin to the wire, and these are operated perfectly under heavy load.
With excellent aging resistance and UV endurance, it can be used in harsh environment.