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mampfes / ha_epex_spot

Adds EPEX Spot data to Home Assistant.
MIT License
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smartENERGY (Austria) Net Price Calculation incorrect #108

Closed AkshayRao27 closed 6 months ago

AkshayRao27 commented 6 months ago

There’s a mismatch between the current price shown on the smartENERGY website and what the sensor calculates.

As of time of writing, the electricity price is ¢8.55 according to the website, and my sensor shows ¢8.842 (¢1.44 surcharge and 20% tax).

The smartENERGY API entry for right now says ¢7.114 which is exactly ¢1.44 short of what their website says.

No matter how I configure the integration, I cannot seem to reach this value. If I include both tax and surcharge, the sensor over reports (current config). If I include just the surcharge but 0% tax, then it under reports.

According to smartENERGY, the prices reported by the API already include 20% tax, so the sensor needs to simply add a static ¢1.44 (the current surcharge) to every price value from the API.

mampfes commented 6 months ago

You have to configure your taxes and surcharges as described in the Net Price Sensor chapter: https://github.com/mampfes/ha_epex_spot?tab=readme-ov-file#1-net-market-price-sensor

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angeeinstein commented 6 months ago

According to smartENERGY, the prices reported by the API already include 20% tax

That is wrong, even though they say it on their website. The provided price from smartENERGY is without tax. It's the same as on the EPEX Spot website. You have to add a surcharge of 1,2ct and then 20% tax. That gives you the 1,44ct (1,2×1,2) surcharge that you really pay to smartENERGY.

AkshayRao27 commented 6 months ago

Okay, that fixes it. I guess the ticket can be closed - might be a good idea to mention this in the documentation somewhere 😉

angeeinstein commented 6 months ago

I already mentioned this to smartENERGY

angeeinstein commented 6 months ago

I already mentioned this to smartENERGY

Their reply (translated): "As you can set the prices in the API yourself, they can also be shown including tax. Our description is therefore a matter of setting, depending on the configuration."