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henricm / ha-ferroamp

Ferroamp MQTT Home Assistant sensors for EnergyHub, SSO, ESM and ESO
MIT License
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sensor.ferroamp_total_solar_energy suddenly decreasing in value #76

Closed jonasbkarlsson closed 3 years ago

jonasbkarlsson commented 3 years ago

The new Energy feature of HA is great, but it heavily depends on the inputs to be "state_class":"total_increasing".

I had a sudden drop in the sensor.ferroamp_total_solar_energy (from 532.2 to 443.5), which messed up the Energy feature.

From the database, select * from states where entity_id="sensor.ferroamp_total_solar_energy";

6724537|sensor|sensor.ferroamp_total_solar_energy|532.2|{"state_class":"total_increasing","unit_of_measurement":"kWh","friendly_name":"Total Solar Energy","icon":"mdi:solar-power","device_class":"energy"}|7436277|2021-09-14 07:10:12.056101|2021-09-14 07:10:12.056101|2021-09-14 07:10:12.056101|6724087
6724760|sensor|sensor.ferroamp_total_solar_energy|443.5|{"state_class":"total_increasing","unit_of_measurement":"kWh","friendly_name":"Total Solar Energy","icon":"mdi:solar-power","device_class":"energy"}|7436523|2021-09-14 07:13:14.061745|2021-09-14 07:13:14.061745|2021-09-14 07:13:14.061745|6724537
6724796|sensor|sensor.ferroamp_total_solar_energy|532.2|{"state_class":"total_increasing","unit_of_measurement":"kWh","friendly_name":"Total Solar Energy","icon":"mdi:solar-power","device_class":"energy"}|7436563|2021-09-14 07:13:45.058075|2021-09-14 07:13:45.058075|2021-09-14 07:13:45.058075|6724760

What could be the cause of this?

I have 2 SSOs, and both of the sensor.ferroamp_sso_XXX_total_energy look ok. At this time they had the values 307.3 kWh and 224.9 kWh. So none of them were 443.5 kWh

I have manually fixed the statistics table to fix the Energy view. So I'm not in a urgent need for help, but it would be nice to avoid this in the future.

argoyle commented 3 years ago

That sounds like a question to Ferroamp I would say.

jonasbkarlsson commented 3 years ago

Right, the source of the problem could be Ferroamp. BTW, I have had similar issues with data from the Nibe component. Sure it would be nice if all sources of data provides error-free information, but considering all the issues I have had the last month, I doubt that is a reasonable expectation. So my conclusion is rather that HA as a whole needs to be more robust. And maybe it the Energy feature that needs improvements, instead of each individual component.

argoyle commented 3 years ago

The "contract" of state class total increasing is that the value always increases. If the value decreases for some reason, the sum is reset to zero and then start increasing from there again which would give you a spike in usage. I had the same problem a week ago but my spike was like 10000kWh 😳 making my graphs very difficult to read.

argoyle commented 3 years ago

I think they are introducing a new state class in the next release which might be more suitable that will cope with those kinds of changes. I'll leave the issue open until I have investigated.