The new ev you mentioned has around a 150kW electric motor and a 64kWh 300 KM battery.
My DW's Kia EV actually has a published 385 km range in standard mode, and it is claiming almost 475 km in Eco mode.
Assuming you charge at least every other day at home, with at least a 32A/ 7.4kW charging station, wondering what the total annual electric consumption is for one car? Or do you charge with a standard outlet?
She uses our smart 230V/32A Level 2 EVSE (charger) to charge it, and the EVSE claims that she is putting 52 kWh into it every other day for 302 km of commuting. Assuming no loss of range in the winter (which is a fallacy), it is using about 6,300 kWh/year for commuting...which is less than $1,000 at our current electric rate. In reality, running the heater and lost range in the winter will probably push it up to 7,500-8,000 kWh from my guestimates. Both of our vehicles use heat pumps and not resistance heating, so it shouldn't be as big of a hit as the Nissan Leaf experiences in the winter.
I charge my i3 on a wall outlet every other night, since it only has a 132 km battery range and can easily charge overnight on the slower 120V Level 1 charger.
Can solar (and solar subsidies resold back to grid) cover the costs?
With our average of 31 kWh/day in EV power usage for commuting, we would need 5,000 watts of panels on a 6-hour sun day. I only have room for 3,000 watts of solar panels, and of course those panels cost money to purchase.
At the moment, the county where my DW works has free EV chargers at every park and county office paid for by their tourism department. No guarantee that they will be free forever, but for the next few years her commuting energy expenses could essentially be zero if she used them instead of charging at home.
NY State also has a grant program that pays employers $4,000/plug for every EV charger they install for employee use. I'm working with my employer now to install a few, not that my car's $11/month electric use is a huge expense.
To me, the math that matters is cost of kWh in electricity, not savings from gas. Remember, the newest gas engines in compact cars get incredible mileage. The new Corolla alone claims 32/42.
Remember to factor in maintenance costs, like oil/fluid changes, tuneups, etc.
The only scheduled maintenance on my EV according to BMW is a brake fluid flush every two years, which is more important in an EV since the use of regen braking prevents the water from being boiled out of the fluid from braking heat.
The only concern with EV life is battery aging. BMW gives an 8 year, unlimited warranty mileage warranty on the traction batteries, guaranteeing that they will have at least 70% of their original capacity or they will be replaced. Kia has an 8/100K mile warranty on their batteries, and Kia has an "unlimited" lifetime warranty on their battery packs (same ones used in the Kia). I'm not losing any sleep over battery life.....