Simple template to sum 3 sensors does not yield correct result

Configuration
1

I am trying to sum the energy consumption of 3 sensors (Mill brand ovens) .
Any ideas as to why these three sensors won’t sum unless all of them have a value other than 0?

Code:

      kwh_po_hourly:
        value_template: >
          {{ '%0.1f' | format(states('sensor.kwh_po_soverommet_hourly') | float(0) + 
                              states('sensor.kwh_po_barnerom_hourly:') | float(0) + 
                              states('sensor.kwh_po_kontoret_hourly:') | float(0)) }}
        unit_of_measurement: 'kWh'
        friendly_name: Panelovner Samlet Forbruk per Time

Result below, where the bottom one should yield 0,18 (?)
sum po

2

Hi
the colons ( : ) at the end of the 2nd and 3rd entity name?

Armin

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