LeftieBiker wrote:The heaters only use about 300 watts, so they just aren't suited to warming the battery to a better operating temp. They can only stop the pack from "freezing."
300W is more than enough to heat the battery way above ambient. It just takes hours instead of minutes.
I estimate at least 10-15 degrees (metric) above ambient is reachable with the heating elements Leaf has.
Yes, if it is -40*C, Leaf battery will still freeze. Though this temperature is not available for long enough
where Leaf is actually sold.
Unfortunately, there is no known way to operate battery heater except opening the pack to change the temperature
sensor resistance values, so the heater will operate according to modified values. No wires come out of the pack.
I would like to switch it on myself as battery efficiency drops when there are less than 4 temperature bars.
And here where I live, I've been down to 2 bars (below -5*C inside the pack) many times. Even down to 1 bar.