Huawei solar show string wattage

Energy
1

Hello,

Is it possible to create a graph showing wattage per string?
I have the Amperage and voltage per string.
So I can calculate the wattage the string is delivering.

Greetings,
Ward

2

What I’d do, but I’m old school, there might be a direct way
Create some templates

  - sensor:
    - name: L1Power
      unit_of_measurement: W
      device_class: power
      state_class: measurement
      state: >
        {{ states('sensor.inverter_pv_1_voltage') | float(0) * states('sensor.inverter_pv_1_current') | float(0) }}
    - name: L2Power
      unit_of_measurement: W
      device_class: power
      state_class: measurement
      state: >
        {{ states('sensor.inverter_pv_2_voltage') | float(0) * states('sensor.inverter_pv_2_current') | float(0) }}

Then you can graph them no issue

1 Like
3

You may also want to consider power factor. The ratio between real and apparent power.

4

Thank you for the info, It didn’t work as you posted.
But I was able to create 2 separate helpers for this with template.

5

The important parts are

device_class: power
state_class: measurement

It will allow integration with energy dashboard and create long time statistics, to have graphics with the history shade like this

image

6

Interesting. One question tho, the output of the inverter in watt is different then the above calculation, by a lot. Possibly it would be good to add a “loss” to the calculation.

For me, the output is 225 Watts in the inverter and the calculation spits out 300 Watts.

7

This could easily be the power factor. I have some pf as low as 0.64.