Energy calculation for over_switch becomes wrong ?

[rept4ol]

Hi all,

Since the 18 January and at this date for me a VTherm update in version 8.6.0, all my energy sensors (x10) show wrong values : Typically, the energy value no longer varies when the room temperature is stabilized with a "low" power percent. I confirm that those values were before fully coherent with the power percent. No change with the last update in version 8.6.1.
So it really seems to be a bug ... Have you noticed the same issue ?

The attributes of one of my Vtherm below:

hvac_modes: heat, off
min_temp: 8
max_temp: 25
target_temp_step: 0.1
preset_modes: none, frost, eco, comfort, boost
current_temperature: 19.5
temperature: 16
hvac_action: idle
preset_mode: eco
hvac_mode: heat
ema_temp: 19.54
specific_states: 
is_on: true
last_central_mode: null
last_update_datetime: '2026-01-24T22:51:28.763445+01:00'
ext_current_temperature: 4.1
last_temperature_datetime: '2026-01-24T22:51:28.761725+01:00'
last_ext_temperature_datetime: '2026-01-24T22:13:04.133425+01:00'
is_device_active: false
device_actives: []
nb_device_actives: 0
ema_temp: 19.54
temperature_slope: -1.2
hvac_off_reason: null
total_energy: 57801.45
last_change_time_from_vtherm: '2026-01-24T22:30:00.197389+01:00'
messages: []
is_sleeping: false
is_locked: false
is_recalculate_scheduled: false
auto_tpi_state: 'off'
auto_tpi_learning: {}

configuration: 
ac_mode: false
type: over_switch
is_controlled_by_central_mode: false
target_temperature_step: 0.1
timezone: Europe/Paris
temperature_unit: °C
is_used_by_central_boiler: false
max_on_percent: null
have_valve_regulation: false
cycle_min: 7
minimal_activation_delay_sec: 16
minimal_deactivation_delay_sec: 0

preset_temperatures: 
frost_temp: 10
eco_temp: 16
boost_temp: 20.5
comfort_temp: 19.5
frost_away_temp: 0
eco_away_temp: 0
boost_away_temp: 0
comfort_away_temp: 0

current_state: 
hvac_mode: heat
target_temperature: 16
preset: eco

requested_state: 
hvac_mode: heat
target_temperature: 18.000000000000014
preset: eco

is_presence_configured: false
is_power_configured: false
power_manager: 
device_power: 900
mean_cycle_power: 0

is_motion_configured: false
is_window_configured: false
is_window_auto_configured: false
is_safety_configured: true
safety_manager: 
safety_state: 'off'
safety_delay_min: 7
safety_min_on_percent: 0.4
safety_default_on_percent: 0.2

is_lock_configured: true
lock_manager: 
is_locked: false
lock_users: true
lock_automations: true
lock_code: false

timed_preset_manager: 
is_active: false
preset: null
end_time: null
remaining_time_min: 0

is_heating_failure_detection_configured: false
is_over_switch: true
on_percent: 0
power_percent: 0
vtherm_over_switch: 
is_inversed: false
keep_alive_sec: 0
underlying_entities:
  - input_boolean.rad_bureau
on_percent: 0
power_percent: 0
on_time_sec: 0
off_time_sec: 420
function: tpi
tpi_coef_int: 0.55
tpi_coef_ext: 0.01
tpi_threshold_low: 0
tpi_threshold_high: 0
minimal_activation_delay: 16
minimal_deactivation_delay: 0
calculated_on_percent: 0
vswitch_on_commands: []
vswitch_off_commands: []

friendly_name: Therm Bureau
supported_features: 401

[jmcollin78]

Hello, in 8.6.0 or 8.6.1 there is really no changes about energy calculation.
There was in 8.5.1 but for over_climate VTherm and that is not your case: https://github.com/jmcollin78/versatile_thermostat/releases/tag/8.5.1

Can you add in your graph the switch state ?

[rept4ol]

Hello, thank you very much for your quick interest and response !
Please find the asked graph below with the switch state. I have also added the power measured by the heater plug (legrand celiane).

I add again the VTherm graph (zoom view below) because I certainly selected another one in the yesterday graph: sorry for this confusion, even if it doesn't change the issue, and the update VTherm and HA core.

[jmcollin78]

It's really looks like a bug. I will transform this question into an issue.

[rept4ol]

Thank you ! VTherm is really a great tool for saving money while improving comfort at home.