So, the pricing issue sounds like a short-term problem. Also, no mention was made of what level charging one gets for the $3-$4. Is that DC fast charging, 30 amp level 2, or something else?
As for hurting BEVs, that's more a function of the charger built into the vehicle. My Roadster can charge at up to a 70 miles of range per hour given a 70amp J1772 (which exist at some Rabobank branches along 101 and at least one place along Hwy 5, both in CA). 90 minutes could yield 105 miles of range, which for $3-$4 ain't a bad deal. As the article says, chargers in cars will get more capable over time, with Nissan planning that the Leaf's charger will double capacity in 2013.
I doubt Walgreens or anyone else in the retail world will be able to create much of a business model for $65,000 400V Level 2 DC chargers to be installed.
At even $4 per HOUR they certainly would be losing money! (50kWh @ 10 cents per is 5 bucks energy cost per hour)
Most of the commercial grade J1772 EVSEs I've seen for these types of applications from the various venders support 30A Level 2 charging @7.2kW maximum which equates to about 25 miles per hour charging (mphc) which at a $3000-$5000 per unit investment is probably "just" do-able potentially receiving a return in a year or two if they are used daily 2-3 times.
But of course 7.2kW is still somewhat overkill for almost all of the J1772 compliant cars that currently exist (Volt, Leaf, iMev) as they are intentionally clipped to 3.3kW (~11.4mphc) mostly in order to facilitate less expensive home 240V EVSE installations (only 20A breaker and wiring required). In fact for the next couple years your Tesla with it's 16.5kW maximum J1772 charge rate would probably be THE ONLY car that could benefit from the 7.2 maximum EVSE output until such time as some of the newer cars that claim a higher 6.6kW rate (~22mphc) such as the 2013 Focus (& Leaf?) can actually make it to market.
But in the meantime this particular "time based" costing model as outlined by Walgreens puts cars at 3.3kW at a distinct disadvantage as it will cost them more than twice as much per kwh than what YOU (a Tesla owner) would pay for 1.5 hours of energy. This is because in 1.5 hours the Volt or Leaf will have amassed 4.95kW but your Tesla would have swallowed up 10.8kW for the same $4. For that matter even 2013 Leaf or Focus owners would also feel somewhat discriminated against receiving just 9.9kW in 1.5 hours. Not such good business practice for a store that sells bologna by the pound!
This I am opposed to. It would be better if they had a selection screen to select your car and priced it accordingly (but still per hour). But of course that would mean a more expensive EVSE that takes longer to pay for itself. (Although most marketing gurus looking at these charging stations consider them more of a tool for increasing business traffic than a direct buy low-sell high profit tool)
Should be interesting to see how it all plays out...
WopOnTour