Yeah battery pricing is a killer so does anyone know if the AltairNano batteries are available to the public? They are Li-Ion 88ah 13.8volts and are probably pretty light compared to Lead - they have a 20+ year calendar life and a very high cycle life so that will bring down the operating cost and reduce the weight significantly plus high output and 10 minute recharge times! Imagine the amps for that!
I am also looking for some good cheep lead batteries pairs of 6 volt or 12 volt batteries no more than 15 inches tall to go in a sail boat 400-500 amp hours total. Right now there are 4-12 volt 125ah batteries in one bank and room for a couple more under another seat.