[Bikestuff]

Guys,

This is something that I have spent a fair amount of time thinking about.

I have a possibly really dumb question....

If you somehow modeled the voltage drop over time for a given amp draw...could you then figure out how much power is left in your batteries? I have gone as far as gathering a bunch of data points (voltage vs time for given amp loads). I am thinking that I can draw out some curves that would allow me to say...I am at 12.9 volts right now and am drawing at -14 amps so I have 6 hours until I get to 11.5V and the Xantrex goes into alarm.

Is this a crazy idea?

cheers,
bill