You are correct, the panels generate 17.2V @4.65a, but what comes out of the charge controller is about 14V at max of 4.65a. ( 17.2V would damage the battery).A good way to check is to actually measure the current out of the charge controller under heavy load. Also keep in mind when connecting your inverter, you will need very heavy short cabling as it will require about 130+ amps from the battery if you ever use all 1500 watts.
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