Below is a compiled battery cable size chart,along with a step-by-step guide to selecting the correct gauge based on amperage,voltage,and cable length. What size solar cable do I Need? Check your owner's manual or contact the manufacturer.
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Based on your PV module STC Isc value seen on the label of each module, when it's less then or equal to 18. 37 A you can use 10 AWG safely. This is only for PV source circuits.
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A: Battery cables typically carry much higher currents (50-200A+) and require larger wire sizes (2 AWG to 4/0 AWG).
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If you're asking this question, you've probably noticed that most modern high power solar modules are manufactured with wire leads that have latching connectors on the ends. These are usually referred to as MC4 connectors.
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