Hi,
Approaching retirement, I wanted to minimize my out-of-pocket expenses and EV is the answer. But I also knew we would like to do cross country trips to family. So our initial change:
Two Prius -> One Prius and One REx
The 03 Prius was 'sold' to our housekeeper and replaced by a 14 BMW i3-REx. The 10 Prius was kept as backup which turned out to be a good-news / bad-news backup. The 14 BMW i3-REx had a motor mount bolt failure that took the car out of service for two weeks. Switching over to the 10 Prius was much easier than dealing with the typical BMW loaner BUT lack of collision detection and dynamic cruise control, I test drove the 17 Prius Prime.
One Prime and One REx
We sold the 10 Prius and bought a new, Prius Prime Plus, an unplanned to affordable expense. The first drive, 1200 miles @55.7 MPG. Radar based, dynamic cruise control and collision avoidance, it has worked every time and gave me confidence even in foggy conditions. The Prime should be paid off the end of this month and has a 25-30 mile EV range versus 72-80 of the REx.
Lessons Learned
Between the Prime and REx, I'm learning how to find EV charging stations, what works and doesn't work:
- home charging - the L1 is OK but caution, running an extension cord or outlet at 80% of rated capacity, they will run warm.
- shopping/dinner out charging - needs to be fast DC or 40A, L2
- work charging - multiple, medium 16A, L2 chargers or 16A, L1 chargers so the employee can do at least half a shift, 4 hours, before needing to move the car
The second lesson is cross country travel is more affordable by maximizing, use of utility-rate, electricity. But finding affordable electrical charging can be difficult or more expensive per mile than gasoline. For example, my trip on Monday to Nashville.
I found EVgo chargers within 3-4 blocks of my physician's office. But http://www.plugshare.com users warned about broken chargers and limited access. This matches my first, experience with an EVgo charger. After 30 minutes, the charger never came on but EVgo did charge my credit card (later fixed.)
Happily, Chargepoint showed a new, 4-port EVSE (aka., charger) that was not on Plugshare which I used:
- $0.85/hour up to 4 hours, 6.6 kW ($0.129/kWh) - this well exceeds the battery capacity of our REx.
- $5.00/hr after 7:30 PM ($0.758/kWh) - Ouch! These are gasoline rates per mile.
The assumption that residential electrical rates would be significantly cheaper than gas holds true. Utility rates don't change as fast as gasoline and today are about 38% the cost per mile as gasoline. But when the Colonial pipeline broke last year, gasoline prices went from just under $2/gal to ~$3/gal. Should another Katrina hurricane hit the Louisiana and Texas coasts, we'll be back in over $3/gal gasoline across SouthEastern USA.
Bob Wilson