Some pedantry: 1. It’s unlikely there’s power conversion circuitry in the kit. It’s almost certainly a few cells in series. 2. I’d be surprised if it can actu

Some pedantry: 1. It’s unlikely there’s power conversion circuitry in the kit. It’s almost certainly a few cells in series. 2. I’d be surprised if it can actually produce 600A at 12V. It’ll be “12V nominal” into an open circuit, which is really more like 14V for a 4-cell Li-ion setup. But even a 600 cold cranking amp lead-acid battery only supplies 7.2V at 600A.