I found a L2 charger at work. At 50F driving and 50F charging. Odometer reports 18.5mi drive and charger reports 5.38kwhr.
Or a total of 3.4mi/kwhr, the most efficient reading I’ve ever gotten.
Looks like L2 chargers up the efficiency by significant margins. I’ll do additional tests later of course. But it sounds like you are interested in the first test results.
L2 charger at work returned 3.4mi/kwhr !!!
L2 charging at 50F (and below) is clearly way more efficient than L1 charging.
With this, I can safely say that L1 chargers should be avoided if possible.