Not sure if this is the place to ask and I Will also be asking /g/ for sure, but this is technically outdoors so here goes.

Im getting a solar boat setup going, and I want to know if im in the right ballpark for voltage etc etc.

Materials:
>45lb TRolling motor runs at 408 watts at max
>20 amp hour deep cycle 12v battery
>#1 50 watt solar panel with panel/battery/output regulator.
Peak power: 50W
Maximum power voltage: 17.5V
Maximum power current: 2.85A

Im horrible with voltages and whatnot, So I just want to know, will this battery and solar setup keep the motor running at least for a few hours intermittently when the solar panel is overcharge-feeding the motor as well as charging battery in full sun?