Smappee EV

Myny_HA · July 28, 2025, 9:53am

Hi all

I recently worked on a new version of the Smappee EV Charger integration, based on the original fork of gvnuland/smappee_ev. You can find my updated version here. It is based on API calls to the Smappee API.

Why?? The original Smappee integration does not support EV Chargers!

This new HACS integration has a few purposes:

Trigger actions in Home Assistant to set the charging mode (SOLAR, SMART, STANDARD), as well as control the charging current/speed. It also includes some interesting actions like setting LED brightness
An important one might be setting the station as available or unavailable — handy when you’re on holiday.
Provide a way to link the charger to open-source (or other) Energy Management Systems.

One such EMS is EVCC. This integration creates a custom sensor specifically for that. There are still some open-ended challenges — for instance, the Smappee charger internally handles 1-phase / 3-phase switching automatically (depending on your installation of course), and there’s no API call to control this. This could have implications for integration and optimization. More testing is needed to figure out the best way of working.

Finally, as I own a Smappee EV Wall Home with Infinity Series meter (Connect, not the Genius). The Genius supports MQTT for easy integration with Home Assistant, the Connect does not! Therefore, I explored using Modbus instead. It appears to provide real-time sensor data: currents, voltages, power, and energy. A how-to is included in the GitHub repo as well.

Let me know if you’ve tested it and whether it fits your use case. Looking forward to seeing your integrations and getting inspired by what you build, but also to discover the best way of integrating it with EVCC for example.

Forssux · August 11, 2025, 1:03pm

Hi There,

Thanks for this…
I have a similar installation, only I have 3-phase and so even with 6A I have 4440 Wh charging.

This is in Belgium not pleasant as you probably already know.
We have something called “capaciteitstarief” witch measure the heaviest load during a 15 min interval and locks that number. It’s then multiplied with 4.5 EURO.
If you only do 14000 kn/year slow charging is a must otherwise you quickly throw away 500 Euro a year.

What I therefore would like to see is the power with wat the car is charged, a way to only charge over 1-phase without changing the cable.

Thanks for reading

Myny_HA · August 12, 2025, 7:50pm

Hi

Indeed, I have the same issue. 3 phase and min 6A implies about 4000W.
Via the modbus integration, power can be read out and shown in Home Assistant. For now, I have figured out how to use it with third party apps, like EVCC, but one major challenge remains: how to switch from 3 phases to 1 phase, especially in winter.
Until now, I do not see an option via API-calls. Let’s hope it may get enabled at some time or someone finds a trick.

Forssux · August 13, 2025, 8:28am

Let,s ask Smappee directly via support…
Why did they not use a kWh Slider instead of there %

Thanks for reading
Guy From Wijnegem

Forssux · August 13, 2025, 8:46am

Kan je me vertellen hoe je de modbus integratie werkend kreeg.
Moet ik iets in de Smappee Home wall box zelf steken?

Een wifi dongle of zoiets?, of is het enkel instellingen in Home assistant?
ps. ik heb Smappee gecontacteerd voor deze waarde in api te krijgen en een kWh slider te gebruiken ipv hun percenten

Mvg,
Guy Forssman

Myny_HA · August 14, 2025, 5:44am

Beste

op de github beschrijf ik de stappen om MODBUS aan de praat te krijgen.

github.com/myny-git/smappee_ev

docs/Smappee_modbus.md

59a156c45

# ⚡ Smappee Modbus Integration Guide (Smappee EV with Infinity series + Home Assistant)

This document explains how to connect your **Smappee EV Wall (Infinity series)** to **Home Assistant** using **Modbus TCP**, enabling real-time access to **power and current** data from your EV charger, grid, and PV system.

> ✅ This setup is designed for advanced users and integrators who want fine-grained control for monitoring, automation, or integration with systems like [EVCC](https://github.com/evcc-io/evcc).

---

## 🧱 Prerequisites

- ✅ Smappee Infinity system (with Modbus support) --> Smappee connect (not the Smappee Genius, this has MQTT and can be manually enabled)
- ✅ IP address of your Smappee module (e.g. `192.168.XX.XX`)
- ✅ Port 502 accessible in your local network
- ✅ Home Assistant with Modbus integration enabled
- Send an email to [email protected] with a request to open modbus on your Connect system
- Afterwards, when you receive the confirmation from Smappee Support, you may have to reboot the charger (put fuse off and on).

## 🛠️ Home Assistant Configuration

**Usage instructions:**

This file has been truncated. show original

Let op, dit werkt enkel als je een Infinity hebt, met Smappee Connect.

Ivm de slider: in de HA integratie heb ik stroom (in A) als primaire bron voorzien. Gebaseerd op de stroom, kan je de power eenvoudig berekenen. Je zou hier een HA template sensor voor kunnen maken die de omzetting doet.

Postal · August 18, 2025, 12:46pm

Thanks for creating the Smappee integration in HCAS.
I was looking for an integration that can control the Smappee as well.
I’ve a fixed 3 phase installation.
As already stated in a other post charging at a low Amp rating is the best option. I’ve set the max charge at 6 Amp in the Smappee dashboard. However, when I flip the “EVCC charge controller 1” to on, I get this error:

Failed to perform the action switch/turn_on. Invalid current range: 6 == 6

When I set the “Maximale stroomsterkte bij connector Rechts” to 7 A, than switching the “EVCC charging control 1” is not giving an error.
As I (almost) always want tot charge with the minimum value on a 3phase system, ie 6 Amp, it is not so handy and save to have to set the minimum on the Smappee dashboard higher than 6 Amp.

Having in the Smappee dashboard the connector at Solar (with max charge 6 Amp) and change that to Normal via the Home-assistant API integration i get

Failed to perform the action button/press. set_charging_mode failed: “/ by zero”

Is there a solution for this?

Is it possible to read the connector status via the API? In order to have the connector status in Home-Assistant to reflect the actual status.

Myny_HA · August 20, 2025, 8:13pm

Hi

i worked hard and have a new version out, as I discovered the MQTT service:
mqtt.smappee.net

Moreover, in that version, normally, I fixed the 6A issue of you, hopefully

Additionally, the connector status is now being read via MQTT, which should give you the same status as on the online Smappee Dashboard.

Let me know if things work (or don’t work)