But the Tesla battery lets you store the energy at home -- and potentially go completely off the grid. The average U.S. household uses 943 kilowatt-hours of electricity in a month and pays 12¢ per kWh, according to the U.S. Energy Information Administration.
http://money.cnn.com/2015/05/01/technology/tesla-home-battery-price/index.html
Buying Model 3 will not cause you to incur additional demand charge of 6.21$/kW and 3.78$/kW in winter and summer, respectively. Your shouldn’t incur the demand charge if you charge your Tesla at night (when your energy demand is low).
https://forums.tesla.com/forum/forums/cost-charging-home
Plan ahead if you have a more complicated installation, such as trenching to a detached garage. Cost can range from $500 to $5,000 (or more) depending on the scope of work. The average NEMA 14-50 installation is between $1,000-$2,000, however it's important to note that every installation is custom to the home.
https://www.tesla.com/support/home-charging-installation
Tesla recommends installing a NEMA 14-50 outlet for use with the Mobile Connector and NEMA 14-50 adapter. Alternatively, a Tesla Wall Connector (optional equipment) can also be installed near your parking spot to prepare for home charging. Compare differences between the Mobile Connector and Wall Connector.
https://www.tesla.com/support/home-charging-installation
Frank99 | May 9, 2016. I have a time-of-use plan - a KW-HR costs me about $0.044 at night, and way more during the day. To fully charge a 60 KW-HR battery would cost me about $2.64, or about $0.012 / mile (assuming 215 miles for a 60 KW-HR battery, and that I charge at night).
https://forums.tesla.com/forum/forums/cost-charging-home
Cost of charging at home. My brother-in-law owns a Model S and he said his electricity bill went up about $15 more a month. I live in SoCal and drive a model S 100 miles a day. It added $150 a month until I offset it all with solar panels.
https://forums.tesla.com/forum/forums/cost-charging-home
Even better, you'll pay only a fraction as much for electricity as you did for gasoline. To prepare your home for charging, hire an electrician to install an outlet near where you park your Tesla vehicle, convenient to the charge port location in the driver’s side rear tail light.
https://www.tesla.com/support/home-charging-installation
In 3+ years of Tesla MS ownership we have charged our MS off our solar paneled roof, we have not paid an electric bill in over three years (all electric home) and our utility provider has paid us between $3,900 and $4,900/year for our excess solar production (net metering).
https://forums.tesla.com/forum/forums/cost-charging-home
Most customers install a 240 volt NEMA 14-50 outlet which will charge their Tesla vehicles at the rate of about 30 miles of range each hour. Identify your daily charge time using the Home Charging Calculator.
https://www.tesla.com/support/home-charging-installation
When will a Tesla home battery pay for itself? The answer depends on where you live -- and how you use it. If you live in the South and already own solar panels, it could take you just under three years to make up the cost of the $3,000 Tesla Powerwall battery. But if you live in the Pacific Northwest and don't have solar panels, it could take you at least 16 years to make up the cost of buying Tesla's new home battery. There are a lot of variables and some tricky math involved to figure out whether the Tesla Powerwall battery makes sense for you.
http://money.cnn.com/2015/05/01/technology/tesla-home-battery-price/index.html
cost of charging tesla at home
The cost of charging a Tesla at home is 12¢ per kWh. The cost of charging Tesla at home is 12 cents per Kilowatt Hour.