Dick Locke wrote:
I am thinking about installing dual electric primary winches, which
are 1500 watt 12 v motors (still waiting on the electric specs to see
breaker size which will define wiring size. I believe that's startup
wattage.)

1500 Watts? Are you sure? The formula P=IE, or I=P/E = I=1500/12=125Amps.
Thats a whole lot of juice. Do you have water cooled jacketed batteries?