Energy Management > Inverter temperature

[julmou]

Good morning,

I have two questions about the "Inverter temperature" section, when we go to Energy Management.

1. When is an inverter considered indoor? What about the containerised solutions such as provided by SMA? See photos below. Indoor? Outdoor?
2. Also I don't understand the last parameter "Increase Acc to Glob Inc, $011" .... seems a bit obscure to me and I didn't find any info in the Helpfile.

Thanks for your help in advance.

Edited April 26, 2022 by julmou

[Michele Oliosi]

Hi,

The $01 is due to a bug, the correct text should indicate something along the lines of: "increase according to global irradiance on the plane of array".
Basically, it means that the temperature will increase according (proportionally to) to the irradiance on your field, i.e. the power generated. The value to be inserted is the increase in degrees per 1000 W/m^2 of irradiance.

The question of outdoors or indoors is really a question of temperature control. In this case the inverters are probably subject to the ambient temperature, so ambient temperature / ambient temperature with shift are both reasonable choices.

[julmou]

Thank you so much Michele, this is clear for me now.

Just one last question to be sure to understand how it works, regarding the "Increase Acc to Glob Inc, $01" parameter (Temperature increase according to incident global irradiation)

It seems the standard value by default from the software is 25°C. So just to make sure, if I leave the "Base temperature" value at 25°C (i.e. it is 25°C in the room) and the increase also at 25°C, does this mean if I have 1000 W/m2 irradiance outside, the room temperature will be at 50°C?

I mean, is it 25°C base temperature when I have zero irradiance and it only goes up from there? (that could make sense, that would mean 25°C when the inverter is not working basically, and then it goes only up from there with every added irradiance).

Thank you in advance for enlightening me.

What if the inverter room is cooled and the temperature always stays at a constant value, do I just put the increase at 0 and the "Base temp." as the controlled temp?

[Michele Oliosi]

Yes and yes.

If you leave 25° & 25°/1000W you will get 50° at 1000W : 25° is the base temperature.

If the inverter is cooled efficiently then yes you can put 0°/1000W as the proportional increase.