09-18-2016, 01:34 AM
(This post was last modified: 09-18-2016, 01:37 AM by flying_solo.)

The SAM discussion got me to thinking. In spite of the danger, I started crunching some numbers and have a few questions.

It looks like the Sam's 100-mile / 12kWh battery costs $5750. If we assume that the Solo's 16.1kWh battery would be about $6k, and last 100k miles, that would be 6 cents per mile. At 150k life - 4 cents per mile. At 200k - 3 cents per mile.

Where I live, electricity runs about 12 cents per kW. There are different rate plans, etc, but that is about average. 16kWh * .12/kW for 100 miles works out to about 2 cents per mile (1.92).

Which leaves a range of 5 to 8 cents per mile for "fuel", with 60% to 75% of the fuel costs paid for upfront in the purchase price of the vehicle.

At $2.00 per gallon, which is the current price for regular locally, that works out to about the same price as 25mpg to 40mpg.

Admittedly, there are some maintenance costs in an ICE vehicle that the EV will avoid:

Oil & filter changes.

Transmission & diff lubes.

Spark plugs and wires.

Fuel filters.

Air filters.

Fan belt.

Starting battery.

I haven't gone through the maintenance schedule for my cars to estimate the cost of maintenance (DIY or dealer) for 100/150/200k, but I ran a quick guesstimate of about $1400 for 200k for DIY. I'm ignoring repair costs, just scheduled maintenance.

That would work out to less that 1 cent per mile (0.7) for routine maintenance exclusive to gasoline vehicles.

If we subtract that from the EV calc above, we wind up with 4 to 7 cents per mile, or 29 to 50mpg equivalent.

At $2.50/gal for gas ~ 36 to 63 mpg

At $3.00/gal for gas ~ 43 to 75 mpg

At $3.50/gal for gas ~ 50 to 88 mpg

Those calcs are assuming a 200k useful battery life at the high mpg end, and 100k at the low mpg end. Also, they are based on the Solo's advertised projections, and would be different for any other EV.

I'm not sure the assumptions are correct, but the calculations were interesting to me.

Do the assumptions seem reasonable?

Do the numbers seem reasonable?

Would this motivate you to buy an EV/Solo, or to walk away? Or would it affect your purchase decision at all?

It looks like the Sam's 100-mile / 12kWh battery costs $5750. If we assume that the Solo's 16.1kWh battery would be about $6k, and last 100k miles, that would be 6 cents per mile. At 150k life - 4 cents per mile. At 200k - 3 cents per mile.

Where I live, electricity runs about 12 cents per kW. There are different rate plans, etc, but that is about average. 16kWh * .12/kW for 100 miles works out to about 2 cents per mile (1.92).

Which leaves a range of 5 to 8 cents per mile for "fuel", with 60% to 75% of the fuel costs paid for upfront in the purchase price of the vehicle.

At $2.00 per gallon, which is the current price for regular locally, that works out to about the same price as 25mpg to 40mpg.

Admittedly, there are some maintenance costs in an ICE vehicle that the EV will avoid:

Oil & filter changes.

Transmission & diff lubes.

Spark plugs and wires.

Fuel filters.

Air filters.

Fan belt.

Starting battery.

I haven't gone through the maintenance schedule for my cars to estimate the cost of maintenance (DIY or dealer) for 100/150/200k, but I ran a quick guesstimate of about $1400 for 200k for DIY. I'm ignoring repair costs, just scheduled maintenance.

That would work out to less that 1 cent per mile (0.7) for routine maintenance exclusive to gasoline vehicles.

If we subtract that from the EV calc above, we wind up with 4 to 7 cents per mile, or 29 to 50mpg equivalent.

At $2.50/gal for gas ~ 36 to 63 mpg

At $3.00/gal for gas ~ 43 to 75 mpg

At $3.50/gal for gas ~ 50 to 88 mpg

Those calcs are assuming a 200k useful battery life at the high mpg end, and 100k at the low mpg end. Also, they are based on the Solo's advertised projections, and would be different for any other EV.

I'm not sure the assumptions are correct, but the calculations were interesting to me.

Do the assumptions seem reasonable?

Do the numbers seem reasonable?

Would this motivate you to buy an EV/Solo, or to walk away? Or would it affect your purchase decision at all?