Energykit

EnergyKit

Use grid cleanliness and cost guidance to shift or reduce managed-device load. For managed-device insights, submit the device's real load events promptly.

Beta-sensitive. Core EnergyKit ships in iOS/iPadOS 26. The iOS/iPadOS 27 ElectricalLoadDevice and Home-facing LoadEvents experience are beta; re-check current Apple documentation before relying on those APIs.

Contents

• Setup
• Core Concepts
• Querying Electricity Guidance
• Working with Guidance Values
• Energy Venues
• Submitting Load Events
• Electricity Insights
• Common Mistakes
• Review Checklist
• References

Setup

Entitlements and Version Split

All EnergyKit use requires com.apple.developer.energykit; enable the EnergyKit capability on the app target. On iOS/iPadOS 27+, add the EnergyKit LoadEvents capability (com.apple.developer.energykit.loadevents-experience) only when the app needs device names, energy context, activity logs, historical charts, or trend notifications in the Home app. That Home experience requires both capabilities. Missing permission can surface as EnergyKitError.permissionDenied.

Import

import EnergyKit

Platform availability: Core EnergyKit APIs are iOS/iPadOS 26.0+. Some insight breakdown APIs, including grid cleanliness categories, are 26.1+ and need availability guards. Apple currently documents electricity guidance only for the contiguous United States; handle EnergyKitError.unsupportedRegion.

Core Concepts

EnergyKit provides two main capabilities:

1. Electricity Guidance -- time-weighted forecasts telling apps when electricity is cleaner and, when rate data is available, less expensive
2. Load Events -- telemetry from managed devices (EV chargers, HVAC) submitted by the same device/app that requested guidance so EnergyKit can generate insights

Key Types

Suggested Actions

Querying Electricity Guidance

Use ElectricityGuidance.Service to get a forecast stream for a venue.

import EnergyKit

func observeGuidance(venueID: UUID) async throws {
    let query = ElectricityGuidance.Query(suggestedAction: .shift)
    let service = ElectricityGuidance.sharedService

    let guidanceStream = service.guidance(using: query, at: venueID)

    for try await guidance in guidanceStream {
        print("Guidance token: \(guidance.guidanceToken)")
        print("Interval: \(guidance.interval)")
        print("Venue: \(guidance.energyVenueID)")

        // Check if rate plan information is available
        if guidance.options.contains(.guidanceIncorporatesRatePlan) {
            print("Rate plan data incorporated")
        }
        if guidance.options.contains(.locationHasRatePlan) {
            print("Location has a rate plan")
        }

        processGuidanceValues(guidance.values)
    }
}

Working with Guidance Values

Each ElectricityGuidance.Value contains a time interval and a rating from 0.0 to 1.0. Lower ratings indicate better times to use electricity.

func processGuidanceValues(_ values: [ElectricityGuidance.Value]) {
    for value in values {
        let interval = value.interval
        let rating = value.rating  // 0.0 (best) to 1.0 (worst)

        print("From \(interval.start) to \(interval.end): rating \(rating)")
    }
}

// Find the best time to charge
func bestChargingWindow(
    in values: [ElectricityGuidance.Value]
) -> ElectricityGuidance.Value? {
    values.min(by: { $0.rating < $1.rating })
}

// Find all "good" windows below a threshold
func goodWindows(
    in values: [ElectricityGuidance.Value],
    threshold: Double = 0.3
) -> [ElectricityGuidance.Value] {
    values.filter { $0.rating <= threshold }
}

Displaying Guidance in SwiftUI

import SwiftUI
import EnergyKit

struct GuidanceTimelineView: View {
    let values: [ElectricityGuidance.Value]

    var body: some View {
        List(values, id: \.interval.start) { value in
            HStack {
                VStack(alignment: .leading) {
                    Text(value.interval.start, style: .time)
                    Text(value.interval.end, style: .time)
                        .foregroundStyle(.secondary)
                }
                Spacer()
                RatingIndicator(rating: value.rating)
            }
        }
    }
}

struct RatingIndicator: View {
    let rating: Double

    var color: Color {
        if rating <= 0.3 { return .green }
        if rating <= 0.6 { return .yellow }
        return .red
    }

    var label: String {
        if rating <= 0.3 { return "Good" }
        if rating <= 0.6 { return "Fair" }
        return "Avoid"
    }

    var body: some View {
        Text(label)
            .padding(.horizontal)
            .padding(.vertical)
            .background(color.opacity(0.2))
            .foregroundStyle(color)
            .clipShape(Capsule())
    }
}

Energy Venues

An EnergyVenue represents a physical location registered for energy management.

// List all venues
func listVenues() async throws -> [EnergyVenue] {
    try await EnergyVenue.venues()
}

// Get a specific venue by ID
func getVenue(id: UUID) async throws -> EnergyVenue {
    try await EnergyVenue.venue(for: id)
}

// Get a venue matching a HomeKit home
func getVenueForHome(homeID: UUID) async throws -> EnergyVenue {
    try await EnergyVenue.venue(matchingHomeUniqueIdentifier: homeID)
}

Venue Properties

let venue = try await EnergyVenue.venue(for: venueID)
print("Venue ID: \(venue.id)")
print("Venue name: \(venue.name)")

Submitting Load Events

Report device consumption data back to the system. This helps the system generate electricity insights. The same EnergyKit-capable device/app that requested electricity guidance must submit the corresponding load events, using the guidance token returned by EnergyKit. Do not invent a token.

EV Charger Load Events

func submitEVBeginEvent(
    at venue: EnergyVenue,
    guidanceToken: UUID,
    deviceID: String,
    deviceName: String
) async throws {
    let session = ElectricVehicleLoadEvent.Session(
        id: UUID(),
        state: .begin,
        guidanceState: ElectricVehicleLoadEvent.Session.GuidanceState(
            wasFollowingGuidance: true,
            guidanceToken: guidanceToken
        )
    )

    let measurement = ElectricVehicleLoadEvent.ElectricalMeasurement(