AION EMS Zeus can bring your EV charger into the complete home energy picture.

By connecting your charger to Zeus, you can monitor live charging power, accumulated energy and charging activity, understand how EV charging affects household demand, and include charging sessions in Zeus analytics and the Home Energy Timeline.

EV charging can represent one of the largest electrical loads in a modern home, so measuring it separately gives Zeus a much clearer understanding of where your energy is going.

Current status: EV charger monitoring has been real-world validated with go-e Charger Gemini devices. Advanced Zeus Smart Control of EV charging should only be enabled/documented after the corresponding control functions have been fully validated.

Before You Start

Your EV charger should already be connected to Home Assistant through its normal integration.

Check that Home Assistant can see the charger and its measurements before configuring Zeus.

Depending on your charger and integration, you may have entities for:

  • Total charging power
  • Phase power
  • Charging energy
  • Charging state
  • Connected vehicle state
  • Current limit
  • Number of active phases
  • Charging enable/disable control

For basic Zeus monitoring, the most important measurement is live charging power.

Step 1 — Add the EV Charger

Open:

AION EMS Zeus → Device Manager → Add Device

Choose:

EV Charger

Give the charger a clear name, for example:

Garage EV Charger

go-e Charger

Wallbox 1

If you have multiple chargers, register each charger separately.

For example:

EV Charger 1
EV Charger 2

This allows Zeus to distinguish their individual consumption and activity.

Step 2 — Connect Charging Power

Select the Home Assistant entity representing the charger’s total current charging power.

This should normally be measured in:

W or kW

Use the total charger power where your integration provides one.

For example:

Charging Power: 8.4 kW

This allows Zeus to recognize the EV charger as an active household load and account for its contribution to House consumption.

Total Power vs Phase Power

Many three-phase chargers expose measurements for:

L1
L2
L3

as well as:

Total Power

If a reliable Total Power entity exists, use that as the main Zeus Power measurement.

Do not map Total Power and the three individual phase measurements as four separate charger loads. That would count the same charging consumption twice.

Phase measurements can still be useful as additional diagnostic information where supported.

Step 3 — Connect Charging Energy

If available, select the accumulated Energy entity for the charger.

This should normally use:

Wh or kWh

and commonly reports:

device_class: energy

with:

state_class: total_increasing

This measurement allows Zeus to understand how much electrical energy the charger has consumed over time.

Remember:

Power = charging right now

Energy = accumulated charging consumption

Step 4 — Save the Charger

Save the device configuration.

The EV charger should now appear as a registered Zeus device.

When no vehicle is charging, the charger may show:

0 W

or a small standby consumption.

When charging begins, Zeus should detect the increase in Power.

Verify Charging

The easiest test is during a real charging session.

Compare the original Home Assistant charger entity with Zeus.

For example:

Home Assistant EV charger: 8.4 kW
Zeus: approximately 8.4 kW

Small differences caused by different update times are normal.

The important thing is that Zeus represents approximately the same real electrical load.

Check House Consumption

Starting EV charging should cause a clear increase in total House demand.

For example, before charging:

House: 2.0 kW

EV charging begins:

EV Charger: 8.4 kW

House consumption should increase to approximately:

10.4 kW

depending on what other devices are doing at the same time.

The EV charger should then appear as part of the registered household load rather than remaining hidden inside Unknown Consumption.

Home Energy Timeline

Zeus can use EV charger activity to create meaningful events in the Home Energy Timeline.

For example:

EV charging started

and later:

EV charging stopped

This provides a simple chronological record of when a large flexible load affected the home energy system.

Charging Restarts and Phase Changes

Some EV chargers can change their operating configuration during a charging session.

For example, a charger may switch between:

1-phase charging

and:

3-phase charging

Depending on the charger, this may require a brief interruption or restart of the charging process.

Zeus should interpret real charger transitions based on the available measurements rather than assuming every short change in Power represents a completely new user charging session.

Multiple EV Chargers

Zeus can monitor more than one EV charger.

Register each independently using its own Power and Energy measurements.

For example:

EV Charger 1 — Garage

EV Charger 2 — Carport

This allows Zeus to distinguish their individual contribution to total household consumption.

Be careful not to additionally register a combined EV charging sensor as another separate load if that sensor already contains the consumption of both chargers.

Otherwise the same energy could be counted twice.

Solar Charging

Your EV charger may already have its own manufacturer control, Home Assistant automation or external energy-management logic for solar charging.

That is completely compatible with Zeus monitoring.

Zeus can observe the resulting charging Power and energy flow without becoming the controller.

For example, another system may decide that the EV should charge at:

4.2 kW

Zeus can still measure that 4.2 kW and include it correctly in:

House Consumption
Registered Loads
Energy Statistics
Timeline

Monitoring and controlling are separate responsibilities.

Smart Control

Do not grant Zeus control of an EV charger simply because the charger has writable Home Assistant entities.

EV charging control involves additional considerations such as:

  • minimum charging current
  • phase configuration
  • vehicle state
  • charger state
  • start/stop behavior
  • communication delays
  • solar-surplus stability
  • grid limits
  • competing charger logic
  • manufacturer-specific behavior

For this reason, the public Zeus guide should treat EV chargers as monitoring devices first.

Advanced EV Smart Control should only be introduced after the complete control path has been tested and validated on supported hardware.

Existing EV Automations

If you already use Home Assistant automations or the charger’s own solar-management system, you do not need to disable them for Zeus monitoring.

Zeus can remain an observer.

If EV Smart Control is added to Zeus in the future, there should be only one active control owner for the charger to prevent competing commands.

What If My Charger Only Provides Power?

That’s enough for useful Zeus monitoring.

With live Power, Zeus can provide:

Current charging consumption
Registered-load accounting
Charging activity detection
Timeline events

An Energy sensor adds historical consumption information but is not required for basic monitoring.

What If My Charger Provides Many Entities?

Do not map everything simply because it exists.

Start with the measurements Zeus actually needs:

Total Power

and, if available:

Total Energy

Additional entities should only be configured when Zeus has a defined use for them.

A smaller number of correct mappings is better than a large number of uncertain mappings.

Validated EV Charger

Zeus EV monitoring has currently been real-world tested with:

go-e Charger Gemini

Testing has included:

  • Live charging Power
  • Registered-load accounting
  • Start/stop detection
  • Home Energy Timeline events
  • Charging restart behavior
  • 1-phase / 3-phase transitions

This does not mean Zeus is limited to go-e chargers.

Other EV chargers can be monitored when they provide suitable Power and Energy entities through Home Assistant.

Troubleshooting

Charger is active but Zeus shows 0 W

Check the original Home Assistant Power entity.

If Home Assistant shows the correct charging Power, review the Zeus Power mapping.

Zeus shows three times too much EV consumption

Check whether individual phase Power entities and Total Power have both been counted.

Use the total charger measurement once.

Charging appears under Unknown Consumption

Make sure the charger is registered in Device Manager and has a valid Power mapping.

Timeline does not show charging

Verify that Zeus receives a clear live Power change when charging begins and ends.

EV Charger Connected

Once Zeus shows approximately the same live charging Power as Home Assistant, the basic EV Charger setup is complete.

For now, keep EV charging as a monitored energy device unless you are using a Zeus control profile that has specifically been tested and validated for your charger.

Zeus can already use the charging information to improve its understanding of your complete household energy demand.

Next: Connect Your Household Devices

Charge your vehicle. Measure the impact. Keep the complete energy picture visible.