Utility meter integration start error

A few days ago I configured several utility meters to measure the daily energy flow from different sources.
Unfortunately, after the power value being constant for a while the utility meter “jumps”. It seems it uses the trapezoidal integration, which whould be wrong.
Integrated graph: (see the jump?!)
Clipboard01

source sensor:
starts charging at around 10, before the value is always 0.
Clipboard02
config of power sensor

  - platform: template
    sensors:
      evchargingpower:
        friendly_name: "Leaf Ladeleistung"
        unit_of_measurement: "W"
        value_template: >
           {% if states.sensor.myenergi_zappi.attributes["ectp1"] is defined %}
             {{ states.sensor.myenergi_zappi.attributes["ectp1"] }}
           {% else %}
             0.0
           {% endif %}

ok, never mind, just realized I had to configure an integrator, which by default is trapeziodal… So I will add here the right integration config, which should solve the issue:

  - platform: integration
    source: sensor.evchargingpower
    name: evcharging_energy
    unit_prefix: k
    round: 3
utility_meter:
  daily_evcharging_energy:
    source: sensor.evcharging_energy
    cycle: daily