Re: [ElectricMotorcycles] Planetary Gear Reduction with Belt drive

[Andrew Wowk]

Mike,
I will start with a 400 amp Curtis with plans for a 600 amp Navitas. With three strings each battery should see no more than 133 amps with the Curtis and 200 with the Navitas. The max charge current is a bit low for these batteries compared to Optimas, Exides, or Hawker Odysseys/Genesis. These are by no means the toughest batteries, their not junk either. The GPR ( http://www.electricmotorsport.com ) uses B&B HR (high rate) batteries which are very similar to the EVP series, just cheaper with slightly more capacity at the expense of cycle life. These batteries should provide 300 100% DOD cycles, similar to Optimas, less than Hawkers.

I don't mind using Chinese batteries. B&B provides excelling spec sheets providing power timetables, cycle information, and additional info that is difficult to find for Exides and Optimas though Hawker does have some decent spec sheets. Added to that is the fact that these B&Bs seem to have a good tract record and are of better quality than the others (Tysonic, Powersonic, Long, ect.). I've heard of people upgradeing to B&B from other Chinese brands with good results.