Lets review multiple days on single charge usage pattern scenario:
I have colleague at work who bought Model 3 AWD recently. Although he bought it to get long range battery, but later he realized: there is a catch with active BMS - it eats itself up. Here is the scenario where it becomes very uncomfortable. He bought it for long trip he makes once a month hoping he could do round trip on fully charged battery. 310 should cover it plenty, except the little detail about trip: he would stay there for a few days. Ops, the car is loosing on average 20 miles a night to keep battery worm, so when it is time to head home - he could not make it as 40-50 miles are gone, combine it with low temp capacity loss and heater (20% on 300 is 60 miles, but on 24kW Leaf capacity lost is only 15 miles as battery is small). - I could not confirm it, but my efficiency in winter is only slightly lower 4.6(summer) vs 4.2 m/kWh(winter) only < 10 miles reduction, yet both are above Leaf rated average. Heat pump certainly helps: 6 kWh (electric heater) vs. 1.5 kW (heat pump).
It gets as bad in commute scenario. Lets say you commute 20 miles a day. So you would think you can make 15 days of commute on full battery, but in reality you could barely make 7 days as every night it will loose 20 miles, so you daily commute becomes 40 miles. Yet on puny 24kW Leaf I could make 4 days. Just think what it does to efficiency? Well it is only half of rated 125 empg and comparable to good hybrids, lol. Even if active BMS EV is charged every day - it is still wasting grid energy on BMS, one way or another you are getting less efficiency, period.
Considering multiple days on single charge scenario - we have 3 x battery size outperforming small battery by lousy 70%. So on Leaf you get almost 100% of the range used for driving, while on active management BMS EV you get barely 50% of the range in this scenario.
Now, we may understand why Nissan is so adamant about active battery temperature management in their EV.
Sometime in the future, the real EV would not waste its energy on keeping itself "alive" without any negative consequences. Not there yet, but Leaf in mild climate gets us closer to the "ideal EV".
So it looks like in multiple days on single charge scenario for 20 miles commute even 40 KWh Leaf with heat pump will beat the crap out of longest range Tesla Model 3 (not even talking about MR or SR variants), 62kWh would be the efficiency king for quite some time even considering possible battery degradation for some folks.
So do your math for your usage scenario, weather condition (temperature specifically including hottest in the summer - day and lowest in winter - night) and where you keep your car during day/night before making purchase decision on EV. The usage pattern for commute I have presented is matched with my requirements and conditions, yours would be different, so is the outcome.
Last edited by Leaf15
on Sun Jan 13, 2019 3:30 pm, edited 7 times in total.
Leaf 2015 SV CPO