Tue May 03, 2016 1:43 pm
Tony Crocker wrote:We just completed one month of ownership, during which we drove 2,554 miles. This included 2 trips to Mammoth and one to Santa Barbara wine country. I used 698kWh at Superchargers and 398kWh at home. The charging speed at home on the 240v NEMA 14-50 is about 26 miles/hour. The marginal cost of electricity at home is about 20 cents/kWh, so that's about $80. A "full charge zero to empty" is theoretically 90kWh or $18 at home. But I limit home charging to 70% to be conservative about prolonging battery life. And when we arrive home from a trip near empty we take the car down to the local supercharger 3 miles away late at night and put 200+ miles of charge on the battery. So the daily home charging is mostly recharging the 20-50 miles we might drive locally each day. I suspect the ~$80/month for local driving is a likely fairly stable cost going forward. The supercharging use is what will vary the most and spring will definitely be the highest Tesla travel season. Winter travel is either by air or beyond the efficient Tesla travel radius of ~400 miles.
I have also had solar panels since 2009 that cover ~3/4 of my electric bill pre-Tesla. Going forward solar should still pay a bit over half, but of course the marginal cost of 20 cents/kWh is the correct way to look at that. In terms of comparing to gasoline cost, California is well above average for the US for both gasoline and electricity, so these comparisons should be done using one's local rates.
The marginal cost of supercharging is zero, but I've read that $2,000 of the price of each Model S or X is earmarked to build out the Supercharger network. The Model 3 is described as "Supercharger enabled." I have not seen yet whether Model 3 will have "free supercharging with cost built into the car" or paid supercharging. One could argue that many Model 3 buyers would prefer a lower initial cost and pay-as-you-go supercharging, especially if the car is going to be mostly used in a radius from home and not much on extended travel. However, the existing supercharger network would need to be retrofitted to accommodate payments, and to distinguish which cars are paid vs. free.
Tue May 03, 2016 2:30 pm
Tue May 03, 2016 3:45 pm
Admin wrote:And how to figure in the $5000 electrician bill to install the charger, and the relevant share of the cost of the solar panels? Recovering that investment is going to take a while at that rate.
Wed May 04, 2016 12:22 am
admin wrote:the $5000 electrician bill to install the charger
MarcC wrote:My break-even point for a solar array/batteries/et al with tax subsidies and other incentives was about 22 years.
Wed May 04, 2016 11:34 am
Tony Crocker wrote:I've never made the argument that my Tesla Model S will be a money saver. But Elon Musk's design/marketing strategy to build cars desirable first on their own merits is proving correct. Cheap gas prices are depressing sales of hybrids and basic plug-in cars, yet there were 180,000 deposits made for Model 3 on its first reservation date March 31 and about 300,000 by now.
Sat Jun 11, 2016 6:19 pm
The solar industry added more new generating capacity this past quarter than coal, natural gas, and nuclear power combined, according to the U.S. Solar Market Insight report released Thursday.
With 1,665 megawatts brought online in the first quarter of 2016, solar accounted for 64 percent of all new electric generating capacity, the Solar Energy Industries Association (SEIA) report said. One megawatt of solar power can energize roughly 160 homes, though that depends on average sunshine, average household electricity consumption, and other factors. According to the report, there are now more than a million operating solar photovoltaic installations across the country, representing 27.5 gigawatts of operating capacity. Just one gigawatt is enough electricity to power about 700,000 average homes.