David Roden (Akron OH USA) wrote:
>
> On 6 Oct 2002 at 9:11, Rich Rudman wrote:
>
> > So if you need some more elbow room on your Lowbatts, please feel free
> > to adjust them down. They are set where Optima would like you to never
> > go below (10 volts). But reality 8 maybe better if you have a long
> > range or a healthy controller.
>
> Your choice of course, but if you routinely discharge them so they fall below 10
> to 10.5 volts at 70-100 amps, you are murdering your batteries. That explains
> your poor battery life.
>
> What kinds of speeds do you drive, and do you have lots of hills? I wonder if it
> would help to change the gearing on the Sparrow. Maybe get a lower top
> speed, but keep the motor in a more efficient range and reduce current.
>
> What do others think?
oF course David, You are NOT talking about my 4 year old Yellow tops...
That have most likely over a thousand cycles, and dozzens of drag Race
runs....
Even a healthy Yt and a 1200 amp controller and you will suck it down
to 8 something.
So I expect to see major sag.
What John is seeing is the 270 %80 DOD cycles. He is getting 2x out of
the Yts that most of us are. And is paying for it rather fast. Now that
it's cooler his range is dropping, and he needs some thermal support,
and maybe a 15 Min splash and Go charge spot.
I have my reservations about Evercells helping because of the high
currents that his EV has to create for the direct drive application.
I give you all a Hint we are going to find out What can be done with
Evercells in a hurry.
I am going to be up to my ears in this stuff in just a few weeks.
--
Rich Rudman
Manzanita Micro
www.manzanitamicro.com
1-360-297-7383,Cell 1-360-620-6266
