Battery meter question

[yurtle]

It would be interesting to see the difference between different pedal-up/pedal-down settings, and with a heavy foot vs. a light foot, 'specially with eight T-105s, 500 amp controller and a 6.1 HP motor.

I'm sure you'd never see the difference on your power bill, but from one efficiency freak to another...

Originally Posted by yurtle

Then a simple data-logger would eliminate the "hassle". I've never played with them, as a PLC could do this in its sleep, but there are PC cards with I/O that could make this a breeze.

redneck please !!!

[JohnnieB]

Originally Posted by yurtle

It would be interesting to see the difference between different pedal-up/pedal-down settings, and with a heavy foot vs. a light foot, 'specially with eight T-105s, 500 amp controller and a 6.1 HP motor.

I'm sure you'd never see the difference on your power bill, but from one efficiency freak to another...

What I'm doing is establishing a baseline for a more or less stock PDS cart with 3.5 year old T-105 batteries, which will be later used to determine what performance increases are realized by replacing the stock PDS (@36V) controller with a DCX400 (@36V), and then between the DCX at 36V and 42V.

I've laid out a course that is 10.2 miles long (GPS) that is a mix of paved and gravel roads with a little cross country mixed in, that includes a fairly long smooth and level section for measuring top cruising speed and a steep hill (~30° incline or ~58% grade - see attached chart) with a paved surface for Max speed under heavy load.

I've got to tweak the route a little because of a busy intersection that I want to avoid to keep the stop times more consistent, but my initial run in PDS Freedom mode gives me 19MPH (GPS) on level ground and 8.5MPH on a hill that is twice EZGO's max recommended incline.

The battery pack was removed from float charge 25 hours before I started and I used the at-rest voltage at hour after I finished for my calculations.
I used 40.5AH (1.677kWh), which means I averaged about 3.97AH per Mile over a wide variety of driving conditions.
That projects to a range of about 28 miles if the battery pack was discharged to 50%, but I suspect Peukert's law will come into play and reduce that number a bit.

It will be nice to have some real numbers to play with.