You seem to forget:.....The power supply I am looking for should give 17v @ 60A = 1020 watt.
If we convert that to 220v load, it would only be pulling 4.6A (@220v)
1020 watts from a 12volt source = 85 Amps assuming 100% efficiency. In the real world you can add at least 30% for losses including inefficiencies, cooling fans etc.
I think you need to approach this project again from the ground up and explore other possibilities.
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