High temperatures

[bereware]

Hello,

I have recently acquired 3 shelly em pro, I have installed them in the electrical panel together (I have no more space), and they give off quite a lot of heat.

I have activated the Eco mode, but they still give off a lot of heat.

The one in between around 54ºC and the two side ones 52ºC (eco mode)

I do not see anywhere the specification of what is the temperature they support, other than that there must be an ambient temperature of max. 40 º C. and the PCB holds a temperature without load of between 50 º C and 60 º C

 

In addition, the manual says that if it reaches 95ºC it automatically shuts off, is this correct?

Does anyone know if there is a problem with the temperatures or have you experienced anything about the temperatures?

Edited July 28, 2024 by bereware
Find the temperature exposure

[tvbshelly]

You can read the internal temperature of the Shelly via a simple call:

http://<shellyIP>/rpc/Temperature.GetStatus?id=0

I have several Pro 3EMs, which usually report a internal temperature between 50 and 55 degrees Celsius.

Edited July 28, 2024 by tvbshelly

[RikC]

On 28.7.2024 at 21:15, tvbshelly said:

You can read the internal temperature of the Shelly via a simple call:

http://<shellyIP>/rpc/Temperature.GetStatus?id=0

I have several Pro 3EMs, which usually report a internal temperature between 50 and 55 degrees Celsius.

That may work with the 3EM but doesn't seem to work with the EM-50 on the latest firmware (1.4.4). I get the error: "No handler for Temperature.GetStatus"

However, I can find a temperture listing when I download the device listing under the diagnostics section:

    "switch:0": {
      "id": 0,
      "source": "init",
      "output": false,
      "temperature": {
        "tC": 52.8,
        "tF": 127.1

[RikC]

Now, to go on what @bereware is stating here. I also have four EM-50's sitting next to each other measuring the groups that consume power in our house (the PV panel group already has it's own CT clamps that come with it's interface).

Immediately after installing I noticed that the EM-50's get quite balmy also when compared to the doorbell transformer which off course is a notorious energy consumer in most distributor boards and putting the EM-50's in eco mode does not make much difference.

Now I suppose the EM-50's are built to handle this but what I'm also concerned about is simply energy consumption. I got the EM-50's out of curiosity and to get our power consumption under control but when they are sitting switched on in my distributor board 24/7 also a few extra watt matter and I have four of them.

I'm reading their data via ethernet and have got every option that I can have disabled on them disabled. But I'm wondering. Would there the possibility to lower the clock speed even further than what is currently the case with Eco mode. Or can radio's in the device completely be disabled if that is not yet the case? And what about local data storage? I don't need that as I'm reading and processing their data further via home assistant.

[wooly]

why instead of putting all side by side you do not put each one on its group, without anything on their side ?
Probably if you read data by radio and remove the switch you could even lower the energy used, more than turning off radio

 

[RikC]

Well, indeed I figured out that a radio connection (especially bluetooth BLE) might be more energy efficient than using ethernet. But in this case I prefer to have a wired connection. They are side by side as well as the three modules width on the right of the EM-50's are used for wiring the electricity to the individual modules with Wago 221-500 adapters which is not visible from the outside.

The heat as such and thus having them side by side doesn't bother me that much. But for me it is an indicator that the EM-50's energy use is higher than what I expected.