Dynamic EV Charging Automation v3.1 - Tesla Fleet for Home Assistant

Jamespigeon · October 1, 2026, 11:00am

Dynamic EV Charging Automation v3.1 - Tesla Fleet for Home Assistant

Tesla Fleet-focused fork of the original Dynamic EV Charging Automation by EDV11.

This blueprint dynamically adjusts EV charging current so the total household power draw stays below a configured limit.

It is designed to work especially well with Tesla Fleet + Tesla Wall Connector + a fast whole-house power sensor such as Tibber Pulse, while retaining compatibility with the original select-based charger control.

Version status

Stable release: v3.0 Tesla Fleet
Stable tag: v3.0-Tesla-Fleet
Development build: v3.1 Tesla Fleet on main

v3.1 adds whole-house power sensor failsafe handling. The stable v3.0 tag remains unchanged.

Highlights in v3.1

Tesla Fleet start/stop support

The charging start/stop input supports both:

switch entities
select entities

For a Tesla Fleet switch:

switch.turn_on  → start charging
switch.turn_off → stop charging

Tesla Fleet commands already wake the vehicle automatically when required.

Whole-house power failsafe

v3.1 no longer treats an unavailable or invalid whole-house power sensor as 0 W.

Default behavior:

Whole-house power invalid/unavailable
→ immediately block ramp-up and charging start
→ hold the current charging setting during the grace period

Still invalid after 120 seconds
→ cap an already-active charging session to 10 A
→ never increase current while failsafe is active

Valid fresh house power returns
→ normal dynamic control resumes

Both values are configurable:

Setting	Default
Whole-House Power Failsafe Current	10 A
Whole-House Power Failsafe Timeout	120 s / 2 min

The failsafe current is a cap, not a target: if charging is already below 10 A, v3.1 does not increase it to 10 A. A stopped vehicle is not started while house-power telemetry is invalid.

Independent ramp-up and ramp-down

Charging current can increase and decrease using different step sizes and delays.

v3.1 re-evaluates charging once per minute while idle. It runs in single mode so a scheduled one-minute trigger cannot cancel an active ramp. While ramping up, every increase step waits for the configured delay and then re-reads whole-house power plus charger power/current before deciding whether another increase is still safe.

The Ramp-Up Deadband is only used to decide whether a new upward ramp is worth starting. The configured value is the minimum upward difference required to start a ramp, so with a 1 A deadband an increase from 18 A to 19 A is allowed. Once a ramp has started, it continues toward the latest safe target and may use a smaller final step to land exactly on that target.

Default values:

Setting	Default
Ramp-up step	1 A
Ramp-up step delay	10 s
Ramp-down step	2 A
Ramp-down step delay	10 s
Ramp-up deadband	1 A (used only to start a new ramp)
Ramp-up stability time	30 s
Restart lockout	300 s / 5 min

One Maximum Grid Draw limit

v3.1 removes the old separate day/night limits and schedules.

You now configure one value:

Maximum Grid Draw (W)

This represents the maximum total household power draw, including EV charging.

Supply presets

Available fallback supply types:

Single-phase 230 V
Three-phase 230 V
Three-phase 400 V

These are used when measured charger power/current are unavailable.

Measured charger power and current

v3.1 can use local charger measurements for more accurate control.

When both are available:

watts per amp = actual charger power / actual charger current

The measured W/A value is preferred over the theoretical supply formula.

Measured charger watts are only counted as active EV load while the charger state is charging, charging_reduced, or starting. This prevents a stale charger-power reading immediately after charging stops from artificially inflating the EV power budget.

If either sensor is unavailable or zero, the blueprint automatically falls back to the selected supply type.

Local charger status

An optional Local Charger Status Sensor can be used instead of slower vehicle telemetry for charging-state decisions.

For Tesla Wall Connector:

sensor.tesla_wall_connector_status

Typical local states include:

charging
charging_reduced
ready
connected
waiting_car
negotiating
charging_finished
not_connected
error

Configurable starting current

Starting Charging Current controls the current requested immediately before a start/restart command.

Default:

6 A

The value is automatically clamped so it cannot exceed the calculated safe target or the configured maximum charging current.

Minimum charging current

The requested minimum can be configured down to:

1 A

If the calculated safe target falls below the configured minimum, charging is stopped instead.

The EV or charger may enforce a higher physical minimum even if Home Assistant accepts a lower requested value.

Restart protection

After charging has been stopped, the blueprint applies a restart lockout.

Default:

300 seconds / 5 minutes

Before restarting, the blueprint waits for the configured stability period and checks household power again. After charging starts, every ramp-up step also uses fresh house/charger readings before increasing current.

Debug logging

Enable Debug Logging while testing.

Messages are written to the Home Assistant Logbook and can include:

current whole-house power
grid_headroom: Maximum Grid Draw minus current whole-house power
charger power source: measured or estimated
W/A source: measured or theoretical
EV_budget: maximum charger power currently available after subtracting non-EV household load
calculated target current
ramp-up / ramp-down decisions
deadband holds
restart lockout status
whole-house power failsafe pending/active status
start command status

Example:

START COMMAND SENT – Tesla Fleet will wake vehicle automatically if required.
Requested start current=6 A (configured=6 A, safe target=14 A).

Recommended Tesla setup

The blueprint labels entity inputs by source:

[CAR] = entity belonging to the EV, normally from Tesla Fleet
[CHARGER] = entity belonging to the local wall charger, such as Tesla Wall Connector
[HOUSE] = whole-house power meter, such as Tibber Pulse
[CAR/PERSON] = optional location tracker

For a Tesla Fleet + Tesla Wall Connector installation, use:

Blueprint input	Use this source
[CAR] EV Charging State Sensor	Tesla Fleet charging-state sensor
[CAR] Charging Start/Stop Control	Tesla Fleet charge switch
[HOUSE] Whole-House Power Sensor	Tibber Pulse or another fast total-power sensor
[CHARGER] Actual Power Sensor	Tesla Wall Connector total power / `Billader`
[CHARGER] Actual Current Sensor	Tesla Wall Connector `Vehicle current`
[CHARGER] Local Status Sensor	`sensor.tesla_wall_connector_status`
[CHARGER] Vehicle Connected Sensor	`binary_sensor.tesla_wall_connector_vehicle_connected`
[CAR] Target EV Charge Cable Sensor	Tesla Fleet Model Y charge-cable binary sensor
[CAR] Charging Current Control	Tesla Fleet charging-current number
Charging Supply	Match the electrical installation

For a Norwegian 230 V IT installation with three-phase EV charging, select:

Three-phase 230 V

For a 400 V TN installation with three-phase charging, select:

Three-phase 400 V

How the calculation works

The blueprint starts with the configured:

Maximum Grid Draw

It reads the current whole-house load and determines how much of that load belongs to the EV.

Two useful values are exposed in debug logs:

grid_headroom = Maximum Grid Draw - current whole-house power
EV_budget     = Maximum Grid Draw - current non-EV household load

grid_headroom shows how far the house is currently below or above the configured limit. EV_budget shows how many watts the charger is allowed to use while respecting that same limit. The EV budget is clamped so it can never exceed Maximum Grid Draw, even if house and charger sensors update at slightly different moments.

When an actual charger-power sensor is available:

non-EV load = whole-house power - actual charger power

Then:

EV power budget = Maximum Grid Draw - non-EV load

If measured charger power and measured charger current are both valid:

real W/A = measured charger power / measured charger current
target current = EV power budget / real W/A

Otherwise, the selected electrical supply preset is used as the W/A fallback.

The resulting target current is:

capped at Maximum Charging Current
changed to 0 A when below Minimum Charging Current
otherwise rounded down to a whole amp

During ramp-up, this calculation is repeated before every increase step. If the fresh target falls, the blueprint stops increasing and can reverse into the configured ramp-down behavior.

After the initial ramp-up stability delay, a fresh target below the current charging current now triggers an immediate ramp-down instead of waiting for the next one-minute evaluation. If the fresh target falls below the configured minimum, charging is stopped.

Suggested starting settings

Maximum grid draw:          9000 W

Minimum charging current:   1 A
Starting charging current:  6 A
Maximum charging current:   Set for your installation/car

Ramp-up step:               1 A
Ramp-up step delay:         10 s

Ramp-down step:             2 A
Ramp-down step delay:       10 s

Ramp-up deadband:           1 A
Ramp-up stability time:     30 s

Restart lockout:            300 s / 5 min

Failsafe current:           10 A
Failsafe timeout:           120 s / 2 min

Debug logging:              On while testing

Installation

Stable v3.0 Tesla Fleet

Manual URL:

https://raw.githubusercontent.com/Teeseeone/electric-vehicle-ev-dynamic-charging-home-assistant-/v3.0-Tesla-Fleet/Dynamic-EV-Charging-Automation.yaml

GitHub release:

https://github.com/Teeseeone/electric-vehicle-ev-dynamic-charging-home-assistant-/releases/tag/v3.0-Tesla-Fleet

Development v3.1

Use main to test the v3.1 failsafe changes before the next release:

https://raw.githubusercontent.com/Teeseeone/electric-vehicle-ev-dynamic-charging-home-assistant-/main/Dynamic-EV-Charging-Automation.yaml

In Home Assistant:

Go to Settings → Automations & Scenes → Blueprints.
Select Import Blueprint.
Paste the URL.
Preview the blueprint.
Import or override the existing blueprint.
Open the automation and verify all v3.1 inputs.

Charging-state behavior

When a valid Local Charger Status Sensor is configured, it is preferred over the vehicle charging-state sensor.

Active/startable states currently handled by the blueprint include:

charging
charging_reduced
starting
stopped
no_power
ready
connected
waiting_car
negotiating
plugged_in
waiting
waiting_for_authorization

States outside the supported list are left alone.

This means states such as a completed or disconnected charging session are not automatically restarted.

Location tracker

The location tracker is optional.

Empty → no location restriction
Selected and home → charging control allowed
Selected and not home → automation blocked

Important notes

Maximum Grid Draw refers to total household load, not charger power.
CAR/Tesla Fleet entities are used for vehicle-specific commands. CHARGER/Wall Connector entities are used for fast local status and measured power/current.
Very low requested currents may not correspond to a physically usable charging current on every EV/charger.
The blueprint does not change the vehicle charge limit.
For shared chargers, configure both Charger Vehicle Connected Sensor and Target EV Charge Cable Sensor. If either configured gate is not ON, the blueprint sends no EV charging commands.
The target-EV cable sensor comes from vehicle telemetry and may update more slowly than local Wall Connector data, so this reduces shared-charger risk but cannot cryptographically identify the vehicle connected to the Wall Connector.
Reading these Home Assistant sensor states does not itself send extra Tesla commands; Tesla Fleet commands are only sent when the blueprint changes charging current or start/stop state.
If the whole-house power sensor becomes invalid, v3.1 blocks ramp-up immediately. After the configured timeout it caps an active charge session to the configured failsafe current rather than assuming the house is using 0 W.
Keep Debug Logging enabled during initial testing.

v3.1 failsafe test checklist

Before releasing v3.1, verify the existing dynamic-control behavior plus:

charging starts successfully
starting current is applied correctly
measured charger W/A is shown in debug logs when both sensors are configured
whole-house load stays near/below Maximum Grid Draw
the fixed one-minute idle re-evaluation works as expected
ramp-up behaves as configured without being interrupted by the one-minute trigger
each ramp-up step re-checks fresh Tibber/house and charger measurements
ramp-down reacts correctly to a sudden household load
charging stops below the configured minimum
restart lockout lasts the configured time
completed/disconnected charging is not restarted
optional location tracker works both filled and empty
house-power sensor becoming unavailable immediately blocks further ramp-up
invalid house-power telemetry for less than the timeout holds the current setting
invalid/stale telemetry for the full timeout caps active charging at the failsafe current
charging below the failsafe current is never increased by failsafe mode
a stopped vehicle is not started while house-power telemetry is invalid
normal dynamic control resumes after valid fresh house-power telemetry returns

Version history

v3.1 Tesla Fleet — development

Added configurable whole-house power failsafe current (default 10 A)
Added configurable whole-house power failsafe timeout (default 120 seconds / 2 minutes)
Invalid/unavailable house-power telemetry immediately blocks charging start and ramp-up
After the timeout, an already-active charging session is capped to the failsafe current
Failsafe mode never raises a lower charging current
Added house-power freshness checks after stability delays and before every ramp-up step
Prevented invalid house-power states from being interpreted as 0 W

v3.0 Tesla Fleet — stable

Added 230 V single-phase, 230 V three-phase, and 400 V three-phase supply presets
Simplified power limiting to one Maximum Grid Draw value
Added direct Tesla Fleet switch start/stop support
Added local charger-status support
Added measured charger-power support
Added measured charger-current support
Added real measured W/A calibration with automatic supply-formula fallback
Added configurable minimum, starting, and maximum charging currents
Added independent ramp-up and ramp-down settings
Added ramp-up deadband and stability checking
Changed deadband behavior so it is the minimum difference required to start a new ramp; a 1 A difference starts when deadband is 1 A, and active ramps finish at the latest safe target
Added a five-minute default restart lockout
Fixed the optional location tracker when left empty
Added detailed optional Logbook debugging, including both grid_headroom and EV_budget
Added explicit start-command logging and documented Tesla Fleet automatic wake behavior
Added shared-charger safety gates using local vehicle-connected and target-EV charge-cable sensors
Labelled blueprint entity inputs as [CAR], [CHARGER], [HOUSE], or [CAR/PERSON] so the intended source is obvious
Removed the 1/3/5-minute interval selector and standardized idle re-evaluation to once per minute
Changed automation execution from restart to single so scheduled triggers cannot cancel an active ramp
Added fresh whole-house and charger re-checks before every ramp-up step; ramp-up halts or reverses if the safe target drops
Fixed stale charger-power handling so measured charger watts are ignored when the local charger is no longer actively charging
Clamped EV budget so sensor timing mismatches cannot make it exceed Maximum Grid Draw
Added immediate post-stability ramp-down/stop when the fresh target falls below the current charging current

v2.3

Added direct switch support for charging start/stop
Added Tesla Fleet start/stop compatibility
Added separate ramp-up and ramp-down step sizes and delays
Improved minimum-current handling

v2.2 — upstream

Made the location tracker optional

v2.1 — upstream

Added case-insensitive charging-state handling, including ESPHome Tesla BLE Charging

v2.0 — upstream

Added charger start/stop control
Updated power-calculation logic
Added gradual charging-current adjustment

Credits

Based on the original Dynamic EV Charging Automation by EDV11:

The original project introduced the core dynamic-charging concept and the earlier start/stop, location, and power-limit logic.

This fork adds Tesla Fleet support, local charger measurements, measured W/A calibration, and the additional charging-stability controls described above.