WLED Power

[milandzuris]

System Health details

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Checklist

• [X] I have read the FAQ to see if there is a known solution to my problem.
• [X] I have enabled debug logging for my installation.
• [X] I have filled out the issue template to the best of my ability.
• [X] This issue only contains 1 issue (if you have multiple issues, open one issue for each issue).
• [X] This issue is not a duplicate issue of currently previous issues..

Describe the issue

Hi, for 160mA is not ok 180watts how fix this?

Settings: 5V 0.9Power Factor

Reproduction steps

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Debug logs

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Diagnostics dump or YAML config

No response

[bramstroker]

That's strange. Could you please share you YAML configuration or when you use the GUI click the three dots and download diagnostics?

Also please enabled debug logging and share logs after startup.

[milandzuris]

That's strange. Could you please share you YAML configuration or when you use the GUI click the three dots and download diagnostics?

Also please enabled debug logging and share logs after startup.

config_entry-powercalc-83f27abab59cc7c15d8d1e403976a615.json.txt

[bramstroker]

Looking at the supplied JSON seems you have set standby power to 180 yourself for this light. When the light is off powercalc will use that value.

[milandzuris]

I change to 0 and 0.72w i think is same too big or no?

[bramstroker]

What is too big? Power is shown as 0.72 W now, which is correct 160 mA 5v 0.9 = 0.72 W

kWh will still be high as this only increases. You must reset this sensor. https://homeassistant-powercalc.readthedocs.io/en/latest/energy-sensor.html#resetting-energy-sensor

[milandzuris]

What is too big? Power is shown as 0.72 W now, which is correct 160 mA 5v 0.9 = 0.72 W

kWh will still be high as this only increases. You must reset this sensor. https://homeassistant-powercalc.readthedocs.io/en/latest/energy-sensor.html#resetting-energy-sensor

but this Power and kWh in 5V i need change when im want in 230V?

[bramstroker]

You'll need to input the voltage of your led strip, NOT 230 volt. Your led strips are not connected to 230 volt directly but uses low voltage which is transformed and supplied by your LED power supply. Would typically be 5, 12 or 24 volt.

[nepozs]

In this case correction factor should be used - typical impulse LED power supply has efficiency about 85%, so power multiply factor should be about 1.176 (only if current/voltage/power was measured at low voltage side).

[bramstroker]

@nepozs There is already a setting on WLED for the power factor. It is at 90% by default. No need to hassle with the multiply factor setting.

[nepozs]

Maybe this "power factor" is in reality efficiency (I can't check it now, because my WLED devices use ESP-01 modules and I'm not able to upgrade firmware to more current version having this option, without hardware upgrade to modules with bigger flash…), but in fact efficiency and power factor are completely separate concepts.

So if in WLED "power factor" means efficiency it is worth issue in that project (because it is misleading).

In real life there are NO devices with efficiency 100% (especially the power supplies), but lots of devices with power factor=1 (incandescent bulbs, heaters, generally resistive load).

https://en.wikipedia.org/wiki/Power_factor https://en.wikipedia.org/wiki/Energy_conversion_efficiency

[bramstroker]

@nepozs Maybe good idea to create a discussion post to further discuss this. This configuration is from powercalc not WLED firmware. WLED only provides an "estimated current" sensor. To create a powercalc sensor with that information I introduced the power factor setting. Real power = current * (power_factor / 100)

Think I will do some real world testing to see how close the power estimation is. When this is a little of we might hardcode the loss of power supply efficiency in the formula.