Set It and Forget It: The Complete Guide to EV Charge Scheduling

You plug in when you get home. The charger waits until electricity is cheapest, usually between 9 PM and 6 AM. Your car is full by morning. That is charge scheduling: a one-time setup that saves 40 to 100 dollars a month depending on your utility's time-of-use rate spread, without any daily effort on your part.

Charger-Based vs Vehicle-Based Scheduling

Most Level 2 chargers pulling 32A to 48A on a 240V circuit (7.7 to 11.5 kW) support app-based scheduling out of the box. A charger delivering 40A continuous on a 50A breaker (NEC 210.19 80% continuous-load rule) adds roughly 9.6 kW, enough to replenish 25 to 30 miles of range per hour. Scheduling that load into an off-peak window is the single highest-leverage move an EV owner can make on their electric bill.

Setting Up by Platform

ChargePoint Home Flex (48A, 11.5 kW max)

1. Open the ChargePoint app and select your home charger
2. Tap "Schedule"
3. Set "Start Time" to your off-peak hour (e.g., 9:00 PM)
4. Set "End Time" to before peak starts (e.g., 6:00 AM)
5. Enable the schedule; it applies every day automatically

Tesla Wall Connector / Tesla App (up to 48A, 11.5 kW)

1. Open the Tesla app, tap "Charging" then "Schedule"
2. Set "Start Charging" time (e.g., 11:00 PM)
3. Alternatively, set a "Departure Time"; the car back-calculates charge start based on current battery percentage and target state of charge (usually 80%)

JuiceBox (JuiceNet app, 32A-48A models)

1. Open JuiceNet app, select your charger
2. Tap "Smart Charging" or "Schedule"
3. Set preferred charging window
4. Optionally enable "Green Charging" to prioritize low-carbon grid hours

Wallbox Pulsar Plus (up to 48A, 11.5 kW)

1. Open myWallbox app, select your charger
2. Navigate to "Schedules"
3. Create a new schedule with start and end times
4. Set which days it applies (weekdays only, every day, etc.)

Departure Time vs Fixed Start Time

Departure Time features (standard on Tesla, Ford, Rivian, and most GM EVs) work backward from a target time and target state of charge. If you tell the car you leave at 7:00 AM and want 80% charge, it calculates the exact charging duration needed for your battery's current state and starts just late enough to finish on time, usually with a small buffer. This differs from a fixed start-time schedule, which begins at a set clock time regardless of how much charge is actually needed.

Battery Longevity: Why 100% Isn't the Goal

Lithium-ion EV batteries degrade faster when held at full charge for extended periods, particularly in heat. Most manufacturers (Tesla, Hyundai, Ford) recommend keeping daily charging in the 20 to 80% range and reserving 100% charges for road trips. A fixed-start schedule that finishes charging at 1 AM but doesn't leave until 7 AM means the pack sits at 100% for six hours, unnecessary calendar-aging stress. Departure Time scheduling avoids this by timing the finish to match your actual leave time.

Utility Smart-Charging Programs

Beyond simple TOU scheduling, many utilities (PG&E, SCE, ConEd, Duke Energy in EV pilot markets) offer enrolled smart-charging programs that pay a rebate, typically $50-$200/year, or a per-kWh credit, in exchange for letting the utility shift or briefly pause your charging session during grid-stress events. These programs use the same charger APIs (ChargePoint, JuiceBox, Wallbox all support utility integrations) that already run your schedule, so enrollment doesn't require new hardware.

How Much Scheduling Actually Saves

The savings depend entirely on the spread between your utility's peak and off-peak rates. A common residential TOU structure charges $0.35-$0.45/kWh during peak hours (typically 4-9 PM) and $0.12-$0.18/kWh off-peak (typically 9 PM-6 AM or midnight-6 AM). Charging a 60 kWh battery from 20% to 80% draws about 36 kWh. At a $0.20/kWh spread, that single session costs roughly $7.20 less off-peak than on-peak. Charged 20-25 times a month, that adds up to $144-$180/year in savings from scheduling alone, before factoring in any utility smart-charging rebate.

Circuit and Charger Basics That Affect Scheduling

Scheduling only matters if the charger is sized correctly in the first place. Most Level 2 home chargers run on a dedicated 240V circuit at 16A-48A, with 32A (7.7 kW) and 40A-48A (9.6-11.5 kW) being the most common residential installs. Under NEC 210.19 and the 80% continuous-load rule, a 40A charger needs a 50A breaker, and a 48A charger needs a 60A breaker. Hardwired installs typically use NEMA 14-50 or 6-50 circuits when plug-in, or direct wiring when hardwired; either way, the breaker size and wire gauge determine your maximum charging speed, which in turn determines how long your scheduled window actually needs to be. A car needing 36 kWh on a 32A/7.7kW charger takes about 4.7 hours; the same 36 kWh on a 48A/11.5kW charger takes about 3.1 hours, that difference determines whether an 8-hour off-peak window is generous or tight for your setup.

Setup Checklist

1. Confirm your utility's TOU rate schedule and exact off-peak hours (varies by utility, commonly 9 PM-6 AM or midnight-6 AM)
2. Choose charger-based OR vehicle-based scheduling, never both simultaneously
3. Set start time 15-30 minutes into the off-peak window
4. If your commute is fixed, use Departure Time instead of a static start time
5. Check for a utility smart-charging enrollment program before finishing setup

Verify It's Working

After setup, check these things during the first week:

1. Plug in during peak hours; the charger should NOT start charging
2. Check the charger app or vehicle app at your scheduled start time; charging should begin within a few minutes
3. Review your utility bill after the first full billing cycle; peak-hour kWh usage should be minimal or zero

Calculate your exact off-peak savings with our Charging Cost Calculator, or confirm your charger supports app scheduling with the Charger Compatibility Checker.