Beiträge von Uksa007

    For anyone who has Net metering I have created a set of templates for Home Assistant that calculate Import, Export and Consumption using the power sensors, which are updated every second so will be about as good as we can get till we can convince someone over at Allterco/Shelly to add the import and export sensors natively.

    Shelly 3EM 3-phase Net Metering templates for Import, export and consumption
    Hi, Please see my templates below to calculate Net Metering correctly for the Shelly 3EM with 3-phase and solar(single or 3-phase), as used in Australia and…
    community.home-assistant.io

    Let me know if you have any questions.

    Hi,

    Shelly 3EM does not support Net metering, which is used extensively here in Australia and in many other parts of the world eg Canada, Denmark, Netherlands, Slovenia, Spain, USA.

    We have to create complex sensors in home assistant to calculate Net metering and it's not accurate due to the update frequency of the sensors.

    With Net metering the 3 phase meter is treated as whole service, you are not metered per phase, you are metered for the sum of the phases as import or export.

    So if you have constant for 1hr:

    Phase A = 100W

    Phase B = 150W

    Phase C = -2000W (solar generation)

    You are metered for the sum: 100+150 +(-2000) = -1750Wh export.

    On your bill you are charged(for that 1hr):

    0 kWh Usage (import)

    1.75 kWh Feed-in credit (export)

    The counters total and total_retuned do not sum up the phases, they increment per phase.

    Could you add some counters(kWh) that increment for each moment in time?:

    power_import(W): if (PhaseA_power + PhaseB_power + PhaseC_power) > 0

    power_export(W): if ((PhaseA_power + PhaseB_power + PhaseC_power ) < 0 ) * -1)

    total_import(kWh): - power_import recorded over time

    total_export(kWh): - power_export recorded over time

    Would be great if the 3EM could add support for Net metering and increment these counters in real time!