Off-peak charging & smart-home automation

The cheapest, simplest charging automation is already in your car: a charging schedule. Your smart home handles reminders and shifts other big loads out of peak hours.

Safety first: Never run a Wall Connector, Mobile Connector or any EV charger through a consumer smart plug. Charging draws a heavy, continuous load for hours. Use a dedicated circuit installed by a qualified electrician, and control charging with the car's schedule or the Tesla app instead.

1. Set an off-peak charging schedule

1. On the car's touchscreen (or in the Tesla app), go to Schedule and choose Charge.
2. Set an End by time at the end of your utility's off-peak window, and pick weekdays or every day.
3. Plug in when you get home. Tesla's manual says the car briefly draws power to work out when it needs to start, then charges to finish by your End by time.
4. Schedules are saved for each location, so a home schedule won't hold you up at a Supercharger. Tesla says scheduled charging is ignored at fast chargers.

Tip: Even without time-of-use rates, Tesla recommends finishing near your departure time. A battery that's still warm from charging needs less energy to precondition.

2. Plug-in reminder with Apple Home

A schedule only works if the car is plugged in. Use recipe 6. CarPlay Disconnected: Plug-In Reminder or automation 7. Plug-in reminder so you get a nudge when you park.

3. Change the charge limit by time of day

Recipe 9. Off-Peak Charge Limit uses the Tesla app's Set Charge Limit action in a Time of Day personal automation.

4. Move other big loads out of peak

1. In the Home app, tap + > Add Automation > A Time of Day is Reached, then pick the start of your peak window.
2. Choose plugs for small loads (dehumidifier, fan, lamp) and set them to Off. Use only plugs rated for the load.
3. Create a second automation at the end of peak that turns them back on.
4. Do the same in Alexa (Routines > Schedule) or Google Home (Automations > Time) if that's your hub.

5. Get your Wall Connector back on Wi-Fi

Smart Charging, Powershare Home Backup and automatic firmware updates all need your Gen 3 or Universal Wall Connector on your home Wi-Fi. If it drops out of the Tesla app after a new router, a password change or a Powerwall swap, reconnect it. These steps follow Tesla’s own support and commissioning pages.

1. Find the Quickstart Guide that came in the box. Its sticker has a QR code and the Wall Connector’s case-sensitive Wi-Fi password. Lost it? Use Diagnose on Tesla’s troubleshooting page and pick Lost Wall Connector Password.
2. Unplug the car and keep it unplugged until you’re done.
3. Make the Wall Connector broadcast its own Wi-Fi. Press and hold the button on the charge handle for about 5 seconds until the lights come on, or switch its breaker off and back on. A pulsing green light means it’s ready. The network, named TeslaWallConnector_ plus a code, only stays up for a few minutes (Tesla says up to 15, depending on firmware), so stand next to the unit.
4. Join that network on your phone by scanning the QR code or typing the password. If your phone won’t join, Tesla suggests turning off cellular data and trying again.
5. Pick your home Wi-Fi. Use the Tesla One app (Tesla Device Setup), or open http://192.168.92.1 in your phone’s browser and choose Wi-Fi. The Wall Connector only joins 2.4 GHz networks with a password.
6. Check the Tesla app. Once the Wall Connector shows up, turn on Smart Charging or Powershare. Tesla says a fix can take up to 24 hours to settle.

Tip: Garages often get weak Wi-Fi. If the Wall Connector keeps dropping off, add a mesh node near the garage that broadcasts 2.4 GHz.

Stop and call Tesla or your electrician if the unit shows no lights, the breaker keeps tripping, or you’d need to open the faceplate. Tesla also says not to troubleshoot during a power outage or extreme weather.

Recommended gear

Real-world examples

Summarized in our own words. Links go to the original posts.

Checked against: Tesla Model Y manual: Scheduled Precondition and Charge · Apple: scenes & automations · Tesla: Troubleshooting a Wall Connector · Tesla: Installing a Wall Connector · Tesla: Wall Connector commissioning