EV Scheduled Charging and Departure Preconditioning: Start Times, Battery Prep and Off-Peak Rules

Correction — November 9, 2026: An earlier checklist incorrectly said the checked 2026 Kia EV6 source did not establish strict and prioritized off-peak modes. Kia's own exact-year U.S. manual expressly documents both Charge ONLY during Off-peak and Prioritize Off-peak Charging, for scheduled AC/portable charging. The checklist below now distinguishes verified EV6 controls from unsupported assumptions about other brands and models. This narrowly sourced correction does not complete the guide-wide source audit overdue since October 31.¹²

Scheduled charging and preconditioning do not mean the same thing in every EV. In the current U.S. sources checked here, some vehicles wait for a fixed start time, some work backward from a desired completion/departure time, and some explicitly distinguish strict off-peak charging from off-peak-prioritized charging that may continue after the cheap window ends.³⁴⁵⁶

2026 U.S. Kia EV6 off-peak choice (source-scoped addition, Nov. 8, 2026): Kia's exact-year CV1/2026/en_US manual distinguishes Charge ONLY during Off-peak (charging stays within the set off-peak window but may not reach 100%) from Prioritize Off-peak Charging (charging starts within that window and may continue afterward to reach 100%). Its separate scheduled-charging chapter limits this schedule to AC/portable charging and says holding the charging-port button for two seconds initiates immediate charging when the vehicle is waiting on the schedule. A priority setting is not a promise to avoid peak electricity rates; neither manual establishes exact owner-bill savings, a software defect, or identical UI across every VIN/software build. This narrow correction does not recertify the rest of this guide, whose whole-source review was due October 31.¹²

Ford's current 2026 Mustang Mach-E U.S./Canada manual adds another useful boundary: Preferred Charge Times are a priority, not a guaranteed no-charge window. At a saved charging location, the vehicle may charge outside the preferred window — including starting immediately after plug-in — when additional time is needed to reach the target charge by the next departure.⁷

The 2027 U.S. Chevrolet Bolt is an especially consequential example: its GM-authored model-year manual explicitly allows Preferred Charge Times to continue charging after the selected time until the target charge is reached. A weekday/weekend completion preference is not a guaranteed utility-price hard stop. Unscheduled days may also charge toward 100% immediately unless the separate Next Charge choice overrides that behavior.⁸

A second control layer can matter just as much: a smart home charger or utility-managed program may have its own schedule. Current SPAN, Emporia, ChargePoint and PG&E documentation shows that schedule ownership, waiting states, overrides and offline behavior are product-specific. There is no support in the checked sources for a universal always use the car or always use the charger rule.^910111213

Departure preparation also differs materially by manufacturer. Tesla's current Model Y manual supports scheduled cabin-and-battery preparation even while unplugged outside Low Power Mode; Ford's current U.S. guidance makes the off-plug option cabin-only and says battery preconditioning requires the vehicle to be plugged in; Hyundai's 2026 IONIQ 5 manual explicitly says scheduled climate uses connected-charger power to control vehicle and battery temperature without using high-voltage-battery power.³¹⁴¹⁵

This verified cohort covers current source scopes for Tesla Model Y, 2026 Hyundai IONIQ 5, 2026 Kia EV6, Chevrolet's current Charging/Energy app behavior, Nissan ARIYA/2026 LEAF connected charging, current Ford departure guidance, the exact-current 2026 Mustang Mach-E Preferred Charge Times behavior, and current ChargePoint Home, Emporia, SPAN Drive and PG&E managed-charging behavior, plus the exact 2027 U.S. Chevrolet Bolt manual controls. Not established means the checked first-party source does not prove that behavior for the stated scope; it does not mean the product can never do it.

The charging-schedule behavior matrix

Who owns the timer: vehicle, smart EVSE or utility?

A home charging session can have more than one control layer. The vehicle can delay when it accepts energy; a smart EVSE can withhold power; and a managed-charging program can choose when an enrolled vehicle or charger is allowed to charge. The exact interaction is not universal. Use the row for the product or program actually controlling the session.

What to do when multiple schedules exist

1. Identify the active controller before changing anything. A plugged in but not charging state can be a normal vehicle wait, an EVSE intentionally withholding power, or a managed-program decision. Emporia even documents that its Ready state can occur when the vehicle itself has a schedule.¹⁰
2. Follow explicit interaction guidance when the manufacturer gives it. SPAN directly recommends disabling the vehicle schedule when SPAN owns the timer and documents an overlap-only outcome when the two schedules conflict.⁹
3. Do not turn SPAN's rule into a universal rule. The checked ChargePoint Home, Emporia and PG&E pages do not establish that every other vehicle/charger/program combination has identical precedence.
4. Know the override semantics for your layer. ChargePoint Home uses a quick plug-unplug-replug override; SPAN uses a charging-mode change; Emporia says its offline manual-start procedure does not override a future schedule event.⁹¹¹¹²
5. Offline does not always mean unscheduled. Emporia and ChargePoint both say their stored schedules continue without Wi-Fi, while the checked PG&E page does not establish an equivalent outage fallback for its managed program.¹¹¹²¹³

For electrical-service headroom and dynamic load sharing rather than clock-time scheduling, use ATC's home EV charger load-management guide and home EV charger circuit calculator.

Departure preconditioning: what actually gets prepared?

The word preconditioning can describe different jobs. The table below is deliberately narrower than the charging-schedule table: it asks what the manufacturer currently says happens before a planned departure, how plug state changes the result, and whether the OEM directly identifies the energy source.

Four boundaries that matter

Cabin preconditioning is not proof of traction-battery preconditioning. Chevrolet's current home-charging guidance directly establishes cabin conditioning from charger energy, but the checked page does not say the departure routine thermally prepares the propulsion battery.¹⁷

Being plugged in is not proof that every preconditioning load comes from the charger. Hyundai directly states the energy source for its scheduled-climate routine. The checked Tesla and Ford departure pages do not provide an equally explicit all-load energy-source statement, so this guide does not fill that field by inference.¹⁴¹⁵

Battery-temperature control is not automatically the same promise as every OEM's battery preconditioning label. Hyundai says its scheduled climate can control vehicle and battery temperature; this guide preserves that wording instead of silently converting all OEM terminology into a single universal feature.¹⁴

Departure preparation is not DC-fast-charge preparation. Ford and Chevrolet separately document battery warming/preparation when approaching a public fast charger, while Tesla says its scheduled charging routine is ignored at fast chargers. The 2026 Mach-E manual also explicitly excludes charging-location and departure/comfort settings from DC fast charging. For the fast-charge-specific job, use ATC's EV battery preconditioning guide.³¹⁵¹⁸⁷

Three schedule types owners should not confuse

1. Fixed-start charging

A fixed-start schedule means the vehicle waits for a specified time before beginning. Kia's 2026 EV6 documentation is the clearest checked example: with Scheduled Charging active and the charger connected, the vehicle waits until the configured time/date. Kia also documents a physical charging-port-button override when immediate charging is needed.⁵

Tesla can also use a Start at time, but its schedule is more flexible because a separate End by time can be used by itself or together with the start.³

Ford's 2026 Mustang Mach-E Preferred Charge Times should not be treated as a strict fixed-start timer. Ford describes preferred windows at a saved charging location and explicitly gives the target-by-departure requirement higher priority when more charging time is needed.⁷

2. Ready-by / departure charging

A ready-by schedule works backward from when you want the vehicle prepared rather than simply starting at a clock time.

Tesla's End by logic briefly draws power after plug-in to calculate the start time needed to reach the charge limit. Chevrolet's current Charge Later support similarly lets the driver choose when the vehicle should be ready.³¹⁷

Hyundai's 2026 IONIQ 5 Next Departure ties scheduled charging and scheduled climate to the planned departure time. Ford's 2026 Mustang Mach-E manual explicitly says reaching the target charge by the next departure is the priority, which is why charging can spill outside the preferred window.¹⁴⁷

3. Strict off-peak vs off-peak-prioritized charging

The 2026 IONIQ 5 makes the difference explicit:

• Charge ONLY during Off-peak: charging stays inside the configured off-peak period even if the vehicle may not reach its target.
• Prioritize Off-peak Charging: charging favors the off-peak period but may continue after it ends to reach the target.⁴

Ford's 2026 Mustang Mach-E lands on the priority/ready-by side of this distinction for Preferred Charge Times. Ford says the vehicle charges in the preferred windows at a saved location, but can charge outside them when additional time is required to reach the target by the next departure.⁷

Those are different promises. An owner trying to guarantee never charge outside my cheap-rate window should not treat a prioritized mode as equivalent to a strict one.

2027 Chevrolet Bolt: completion by a time is not a hard cutoff

For the 2027 U.S. Bolt, choose Next Charge > Charge Later when you want the vehicle to aim for a target percentage by a departure/completion time. To assign different targets, completion times and optional cabin preparation to particular weekdays, use Upcoming Schedule at the saved Home Location. The default Charge Now choice starts immediately instead.⁸

The subtle but important exception is in Preferred Charge Times. GM says those weekday/weekend settings encourage cost-effective off-peak charging, but the car can keep charging beyond the specified completion time until it reaches the chosen charge level. They are not documented as an absolute rate-window lockout. Another easily missed default: days not assigned to any weekly schedule start charging to 100% when plugged in unless Next Charge is set differently. Check the active day, target percentage and Next Charge mode rather than assuming the calendar excludes all unscheduled days.⁸

For an hours-only electricity restriction, confirm which device actually controls power. The checked MY2027 manual does not establish that the car can guarantee zero charging during every expensive tariff hour. A separate smart EVSE may withhold AC power on its own configured clock schedule only where its particular manufacturer's documentation supports that behavior; the independent SPAN, Emporia and ChargePoint rows above have different overrides and interactions. This is not a diagnosis of a 2027 Bolt defect, an assurance of compatibility, or a calculated bill saving.⁹¹¹¹²⁸

Why a car may charge immediately even though a schedule exists

The answer is model/software specific.

Tesla documents several cases where Model Y Scheduled Charging can start immediately, including when the car is plugged in during the scheduled block, within a defined period after a start time when no end-by time exists, when the next schedule is sufficiently far away, or when there is not enough time to reach the charge limit by an end-by time.³

Ford documents a parallel but source-specific condition for the 2026 Mustang Mach-E: if the vehicle needs additional time outside the preferred window to reach the maximum charge level by the next departure, it can begin charging right away after plug-in.⁷

That is why it ignored my schedule is not enough to diagnose a charging problem. The behavior may be an intentional ready-by rule rather than a schedule failure.

For the 2026 U.S. Kia EV6, Kia specifies holding the charging-port button for two seconds to start immediately when scheduled AC/portable charging would otherwise wait. Disabling the schedule via infotainment or Kia Access is another documented option. Kia's strict off-peak mode is the documented choice for limiting a scheduled AC session to the configured cheaper window; priority mode may cross that boundary. The correct charge mode does not establish a particular utility tariff or fix an unrelated charger-side schedule.⁵¹²

For Hyundai, Nissan and the Chevrolet app scopes above, this guide does not invent an equivalent late-plug or manual-override rule when the checked source does not establish one.

Location can be part of the schedule

Tesla saves schedules by location and says a Current Location schedule is reused when the car returns to approximately the same physical location. Chevrolet's current Charging app requires a Home Charge Location for weekly home schedules; Chevrolet's Energy app also supports different location-based charging preferences.³⁶¹⁹

Ford's 2026 Mustang Mach-E manual likewise ties Preferred Charge Times to a charging location. Before saving a new location, Ford says the vehicle should have successfully charged there for at least a few minutes.⁷

That means a schedule appearing correctly configured in the vehicle or app does not necessarily prove it will apply at every charging location.

Scheduled charging and preconditioning are related, but not identical

A departure schedule can include climate or battery preparation without making every preconditioning control part of the charge-timer algorithm.

• Tesla: Precondition is separately scheduled and prepares the battery and cabin by the selected time; the current manual also allows it to operate unplugged when the vehicle is not in Low Power Mode.³
• 2026 IONIQ 5: scheduled climate is tied to Next Departure and directly uses power from the connected charger while controlling vehicle and battery temperature without high-voltage-battery power.¹⁴
• Chevrolet: the current home-charging flow lets the driver set a ready-by time and enable cabin preconditioning; Chevrolet says that cabin preconditioning uses energy from the charger. The checked source does not establish traction-battery departure preconditioning.¹⁷
• Ford: current U.S. guidance says Departure Times prepare the battery and cabin while plugged in; off plug, the current documented option is cabin-only and battery preconditioning does not occur.¹⁵

For preparing the traction battery before DC fast charging, see ATC's EV battery preconditioning guide. That is a different reader task from scheduling a home/departure routine.

Ford Energy Rewards versus TXU Free EV Miles: a utility reward is not the car's charging timer

Eligibility check first: Ford's current Ford Energy Rewards portal describes a participating-utility managed-charging program. Ford says qualifying owners need a supported EV/PHEV linked to Ford App, the ability to charge at home, and an actual participating utility; Ford builds a schedule from the owner's preferences. Rewards may be one-time or ongoing, but the currently indexed portal is JavaScript-dependent and does not establish a complete list of eligible utilities, vehicles or ZIP codes.²¹

TXU Energy Free EV Miles is a distinct Texas-specific example, not a nationwide Ford incentive or complimentary public fast charging. Ford's April 23, 2026 announcement advertises bill credits for qualifying at-home EV charging plus conditional $100 Ford signup and $250 TXU plan-anniversary incentives for enrolled owners. An individual household's eligibility, signed rate plan and benefit payment have not been verified.²²

Practical eligibility/billing checklist: Verify the exact utility and service address, Ford model and enrollment, whether the program is Ford Energy Rewards or a specific TXU retail electricity plan, the actual signed Electricity Facts Label, charger/vehicle telematics authorization, scheduling authority and possible late-charge override, plus the subsequent bill's credited EV-charging kWh. TXU's general first-party plan wording applies credits to eligible EV charging at the service address, not unrestricted whole-home electricity. Individual annual savings and enrollment rewards are not guaranteed by these public source descriptions.²¹²²²³

Source limitation (Oct. 28, 2026): Ford's fully interactive eligibility portal and the TXU general English plan were not independently rendered as complete current contracts. TXU's 7 p.m. general-plan text is from a first-party search-indexed page, with a separately directly inspected 2024 TXU original; the attempted TXU Spanish campaign URL redirected to the homepage and was not used as evidence. Current plan-specific governing eligibility/credit hours remain needs-evidence, not a certified nationwide utility-rate matrix. The existing full-guide source review is still due Oct. 31, 2026.²¹²³²⁴

Before relying on a cheap-rate or departure schedule

1. Know which layer owns the timer. Vehicle, EVSE and utility-managed schedules can all control a home session. Follow the exact current product/program guidance rather than assuming one layer always wins.^79101213
2. Know whether your setting is strict or ready-by. If the vehicle is allowed to overflow the cheap window to hit the target, the utility bill may not match a simple nighttime-timer assumption. The 2026 Mach-E Preferred Charge Times behavior is explicitly priority/ready-by rather than strict.⁷
3. Check whether your departure routine is cabin-only or cabin-plus-battery. Ford, Tesla, Hyundai and Chevrolet do not expose the same documented behavior.^3141517
4. Check the plug-state rule. Ford's battery preconditioning requires a plug in its current Departure Times guidance; Tesla's current Model Y scheduled Precondition can operate unplugged outside Low Power Mode.³¹⁵
5. Check the location state. A saved-home schedule may not apply elsewhere; the 2026 Mach-E manual specifically requires a learned/saved charging location for Preferred Charge Times.³⁶⁷
6. Check what happens when you plug in late or need power now. Tesla and the 2026 Mach-E document conditions where charging can begin immediately to satisfy a ready-by target; home-EVSE overrides vary materially between SPAN, Emporia and ChargePoint.^3791112
7. Use the exact current manual/app/program scope. App labels, utility integrations and schedule behavior can change independently of the hardware model year.
8. Do not infer behavior from a related brand or platform. Kia's 2026 U.S. EV6 manual independently documents both Charge ONLY during Off-peak and Prioritize Off-peak Charging for scheduled AC/portable charging. That EV6-specific evidence does not establish the same modes for a Hyundai IONIQ 5 or another model. Likewise, the 2026 Mustang Mach-E rule should not be generalized to F-150 Lightning without exact-current Lightning evidence.¹²⁷
9. Keep target SOC separate from timing. A charging schedule controls when energy is taken; the target-charge setting controls how high to charge. See ATC's routine EV charge-limit guide.

Sources