cruisin - I will PM you. Have interest in AC50 as an auxiliary power source for our DC conversions. Would love to tap into your experience and you are local (I am in San Mateo)
to someone's question on batteries: in this day, LiFePo4 is the only meaningful choice IMHO. Going with lead, you will:
1. Spend up to 2x MORE with lead over the life of the car on batteries.
2. You will have 2x weight of the pack for the same capacity
3. You will have 0.5x the range for the same capacity
It's just a losing proposition all around.
And no, you don't need to babysit them. Lead Acids require more maintenance than LiFePo4.
Lastly, to one of the posts on the first page. Someone asked for a choice between AC50 system and 11"DC with 1kA Zilla. That comparison is just unfair. AC50 will feel like a golf cart compared to 1000A running through a 11" series DC motor. You will see at least 3x the torque and, if you configure your pack voltage right, at least 3-4x the top power. Now, you will pay for that with 3x the weight (~350lbs for motor + controller vs. ~130lbs) and loss of ~15-20% in efficiency. This could result in 15-25% decrease in your range. And that's before considering the fact that when you have power available, you WILL use it ;-))) - further reducing your efficiency. But that's a matter of personal choice. I went with a 11" DC + 1000A controller on 256V Lithium pack on my 2500lb Fiat conversion (http://www.emotorwerks.com/cgi-bin/FiatConversion.pl
). I like it! ;-)) I am going with a big DC motor (Warp11HV most likely) and 340V pack for my BMW E46 conversion but am thinking of adding an AC50 system for regen and additional power boost - sort of an AC/DC hybrid ;-))) Cruisin - would love your take on that latter config idea.