RegGuheert said:How long did you leave the wipers on? Also, how often does LeafDD sample the voltage of the 12V bus? Only your low beams are LEDs. Your high beams are halogens.
1. The wipers were on the length of the outbound trip, i.e. about 45 minutes. The wipers were left
on a few minutes each time during the return trip and the voltage didn't change. Today I'll leave
them on longer and see if there's more of a delay factor. Remember, there're other motor loads,
e.g. the inside fan blower motor that even draws more startup/run current than the wiper motor.
2. The LeafDD sampling rate is much greater the my LeafSpy since the LeafDD samples less data.
The 12 volt battery voltage is sampled at less than every minute.
3. The LED highlights were indicated because they draw less current than halogens and that some
Leafs lack LEDs. So they provide less of a load on the 12 volt battery, thus being less of factor in determining
the Leaf's charging voltage than would halogens.
Update:
It does take a little over a minute before the battery voltage reaches the 14.3 to 14.5 volts after
the wipers are turned on. The voltage remains at that voltage for another minute or two after
the wipers are turned off, at which point the voltage is at 13.0. It now appears that no other
loads, e.g. heater/fan blower at any setting, will cause the charging voltage to increase to the
higher level other than the wipers. Further testing, though, needs to be done to determine
if other conditions exist where the battery is charged to a higher voltage than 13.0.
RegGuheert said:Anyone want to discuss the trade-off between wiping a dry windshield to save the 12V battery versus the cost of replacing a scratched windshield and worn wiper blades?
Again, that's YOUR assumption that the Leaf battery needs supplemental charging!