Incorrect Power Readings in Complete Darkness (Phantom Power)

[Biospargel]

What happened?

I have noticed that OpenDTU continues to display a power input of 24W (it’s different every time) even in complete darkness. This issue persists despite the inverter being offline for several hours.

The last update from the inverter was at 15:10, yet OpenDTU still displays power input at 20:57. Could this be caused by a caching issue or a bug in power calculation?

To Reproduce Bug

It’s only sometimes and not really common. But for me it’s annoying because I have charging automations that uses this value.
A restart solves this problem.

Expected Behavior

That the input value is set to zero after the inverter is shut down.

Install Method

Pre-Compiled binary from GitHub releases

What git-hash/version of OpenDTU?

5A9F44

What firmware variant (PIO Environment) are you using?

generic

Relevant log/trace output

Anything else?

No response

Please confirm the following

• I believe this issue is a bug that affects all users of OpenDTU, not something specific to my installation.
• I have already searched for relevant existing issues and discussions before opening this report.
• I have updated the title field above with a concise description.
• I have double checked that my inverter does not contain a W in the model name (like HMS-xxxW) as they are not supported.

[tbnobody]

Could this be caused by a caching issue or a bug in power calculation?

The value is not calculated it is the same value as the inverter supplies..

That the input value is set to zero after the inverter is shut down.

Its not possible to detect whether the inverter is shut down. It's just known that the inverter is no more reachable.. In this case, just enable the Zero Runtime Data feature.