How do I safely connect my inverter to the battery?
Ensure that the battery voltage matches the inverter input DC voltage, then connect the red cable of the inverter to the positive pole and black cable to the negative pole of the battery. Reverse connection will burn the fuse; make sure connections are correct and secure. (Page 4)
From the official Vevor BL Wxxxxv L 3000w Pure Sine Wave Inverter Charger manual, page 5
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