Short answer: solar PV cables and connectors should be selected by DC voltage, current rating, conductor size, insulation material, UV resistance, connector compatibility and project standard.
| PV cable | Confirm 1000V or 1500V DC rating, conductor size, insulation material and UV resistance. |
|---|---|
| MC4 connector | Confirm rated voltage, rated current, cable size range and connector compatibility. |
| Combiner protection | Confirm DC fuse, DC SPD, isolator and enclosure rating when required. |
| Environment | Confirm outdoor UV, temperature range, flame retardant and halogen-free requirement. |
Do not mix incompatible PV connectors only because they have similar appearance. Contact resistance and locking fit must match.
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