Mike Nickerson and all, My apologies for not answering your last question more accurately about total wattage off the roof and per square foot. At 65 x 39 inches (17.6sf) the 11 modules yield 2,585 watts (13.3 w/ft2). Their replacement with cells of similar output and utilizing the full roof area (not limited to large rectangles) would yield nearly 30 square feet and 3990 watts.
That would probably increase the speed to well over 4 mph and keep the battery bank full all (sunny) day. There are very special batteries I will be using as soon as one of the companies with whom I am working, get them into production. They are not Li types, they are in fact extremely close in specification to current Li units but are foamed lead acid. Many of the inter/intra-cellular balancing schemes and temperature problems are avoided with weight and power density the same. Some of that is covered and linked from http://www.mogcanalboat.com/ The major difficulty with a boat, that does not arise with cars and airplanes, is the need for sleeping, cooking, watermarking, power creation, hot water, anchors/chain, ground tackle, dingy, auxiliary power and a freezer, just to mention a few. For those reasons everything on the boat must have two uses (at least) or available living space gets filled in. Heat from PVs is used for assisting hot water and refrigeration in winter is used as an additional heating source….. on and on. This all results in creating a power grid (redundancy) instead of just ‘wiring’ and breakers. Keeping the 'down from roof voltage low' is also key to avoid frying someone's pacemaker (not sure that is a reality but is an example). However, the voltage must be a bit higher than the battery bank voltage to have best performance of the MPPT solar electric controllers. George _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
