I recently purchased a new Nissan Leaf (S with quick-charge package) and have a 6.6kW ChargePoint charger at my work available to me at a cost of $1/hr. I'm not sure if I'll qualify for the No-charge-to-charge program on this charger, so lets assume not for the purposes of this discussion.
My question is whether is will be cheaper (per kWh received) to charge at this station vs trickle charging with L1 at home (with a cost of $0.13/kWh).
At the surface, L1 charging appears cheaper at $0.13/kWh as L2 would cost $1/6.6kW = $0.15/kWhr. Or is the actual maxiumum transfered only 6.0kW, so $1/6.0kW = $0.17/kWh. But L1 is less efficient than L2 charging due to the lower voltages involved (110V vs 220V). I've seen different efficiency ratings of L1 (66-75%) and L2 (75-87%) quoted.
Also -- I'm not sure if ChargePoint charges for actual time used or increments (in 15min etc...).
Also -- I'm not sure if ChargePoint continues to charge even when the battery is full.
While I know that many ChargePoint chargers are free, this really wouldn't be convenient for me on a daily basis, so let's restrict the discussion to a cost of $1/hr to use the charger.
Any thoughts would be appreciated. Certainly L2 is much faster which is great, but I'm primarily interested in the comparing the final cost charged vs. energy received.
My question is whether is will be cheaper (per kWh received) to charge at this station vs trickle charging with L1 at home (with a cost of $0.13/kWh).
At the surface, L1 charging appears cheaper at $0.13/kWh as L2 would cost $1/6.6kW = $0.15/kWhr. Or is the actual maxiumum transfered only 6.0kW, so $1/6.0kW = $0.17/kWh. But L1 is less efficient than L2 charging due to the lower voltages involved (110V vs 220V). I've seen different efficiency ratings of L1 (66-75%) and L2 (75-87%) quoted.
Also -- I'm not sure if ChargePoint charges for actual time used or increments (in 15min etc...).
Also -- I'm not sure if ChargePoint continues to charge even when the battery is full.
While I know that many ChargePoint chargers are free, this really wouldn't be convenient for me on a daily basis, so let's restrict the discussion to a cost of $1/hr to use the charger.
Any thoughts would be appreciated. Certainly L2 is much faster which is great, but I'm primarily interested in the comparing the final cost charged vs. energy received.