400-450W is the realm of commercial
systems more than boating
systems, so you’ll need to find a good commercial solar
provider. There are many online. The cream of that crop is probably the Sunpower 435W commercial panel
. Those can be hard to come by. Next up in quality are probably the Panasonic HIT
and LG NeON panels
, although I think the largest for both of those is in the high 3xxW/panel.
No way to answer if the quantity proposed is right without a whole lot more information. A 20kW array on a boat would certainly be interesting, but at 95’ you might be able to fit it.