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Step 1: Ensure Safety First
- Turn off the solar system (inverter + DC isolator)
- Make sure there is no current flowing
- If possible, disconnect during low sunlight (or cover panels)
Note: MC4 connectors can still carry high DC voltage, which is more dangerous than AC when unplugging.
Step 2: Use an MC4 Unlock Tool (Recommended)
- Use a dedicated MC4 spanner tool (plastic key)
- Insert the tool into the side locking tabs
- Press both tabs inward
Step 3: Pull Apart the Connector
- While pressing the tabs, pull the connectors apart firmly
- Do NOT twist excessively (can damage internal contacts)
View Our MC4 Connector Product Lineup
If You Don’t Have a Tool (Not Ideal)
You can use:
- Small flathead screwdriver
- Your fingers (if accessible)
But:
- Be careful not to break the locking clips
- Avoid damaging the waterproof seal
Common Mistakes to Avoid
- Pulling without releasing the lock → breaks connector
- Disconnecting under load → causes arcing
- Using metal tools carelessly → short circuit risk
- Twisting too hard → damages pins
