external fans on inverter

My house has a "U" shape and the inverter is in the middle of this "U". In summer it gets quite hot in this enclosed area and its fans have no speed control, it's either on or off and they are crazy loud. In my case it's more an issue with the noise than about it being too hot.

I added fans on the opposite side of the inverter's existing fans to pull air through the radiator. These fans are controlled by Home Assistant and ramp up based on the inverter temp. Even at max speed it's barely audible inside the house, this is a graph from today, the inverter fans only kicked in ~4 times (they turn on at 50c):

1793474685875.png
 
My garage is also getting hot I was thinking of trying to put a pull and push fan pair in to move fresh air through it. Keep the Sunsynk cool.
 
I reckon if they are turning themselves off then you are just fine.

If they were staying on the whole time then you have a problem.

Why not rather for an extractor far to the garage roof itself and in doing so cool the whole thing down?
 
Keep them in a spare utility room with an inverter aircon set to 20 C. No issues so far. Large batteries and inverter too - enough to go off grid for now, at least. Maximising panels next by getting Canadian stuff. 30 year warranty is no joke, they make their stuff good even if it is outsourced to China.
 
denmendez65 said:
You guys are jumping through hoops redesigning stuff that is not necessary. These things have datasheets and show you what the max operating ambient temp is.

You cannot walk into a garage and say "its hot" and start worrying about your inverter etc. Has the inverter given a temp alarm? Do you have actual ambient temp measurements? Etc.

Most of these hacks are pointless in my opinion. If the inverter etc says its fine then leave it. Sticking a fan on top of a inverter and forcing hot ambient air through it is a pointless exercise. Just have a window or something open.

Its like the Powerforum guys inverting the fans on axperts etc so that they suck in rather than blowing downwards. Another pointless exercise. I can find hundreds of people with zero tech savvy having never changed any fan positioning or added additional fans and the inverters are hitting 10 years.

If it hasnt hit an alarm leave it as is. Note "Alarm" there is still there actual cut off level after the alarm. Shows you how much buffer these things have.
Click to expand...
Yea there is likely a reason for the non perfect fan ditection on axperts

Often in humid enviroments you get condensation on the fan grids as the fan super cools that metal grid right by the fan

This way that condensation would be blown out the bottom instead of being blown into the inverter
 
leon.davibe said:
Yea there is likely a reason for the non perfect fan ditection on axperts

Often in humid enviroments you get condensation on the fan grids as the fan super cools that metal grid right by the fan

This way that condensation would be blown out the bottom instead of being blown into the inverter
Click to expand...
That is the best explanation I have read about why they blow out the bottom. I am sure there is more to it also but some people on Powerforum think they are smarter than the guys that design these things for a living.
 
denmendez65 said:
That is the best explanation I have read about why they blow out the bottom. I am sure there is more to it also but some people on Powerforum think they are smarter than the guys that design these things for a living.
Click to expand...
I had some miners in high humidity enviroment

Had to wet and dry vacuum them
one rainy day

Because of the condensation on the super cooled grids right by the fan

Replacing them with 3d printed fan gaurds solved the problem
 
Noticed over the last few days that my slave inverter has been running quite a bit warmer than the master. On closer inspection, my one fan on the slave died.

I've been one of those 'idiots' that decided some airflow couldnt hurt and put two PC fans under each inverter, blowing upward. Cant remember the exact temps, but something along the lines of 'as soon as one of them get to 56 degrees on the DC side, switch on fans and only once lowest temp goes below 42 degrees, switch off'.

So yeah, one of the fans failed and I immediately saw it.

The temps are high, I know, but I WORK my inverters during the day. The slave saw 83 degrees today, where highest on the master was about 70.

I'll be replacing the fan over the weekend. I prefer to call it 'insurance, rather than ridiculous and if the manufacturer wanted fans, they would put it in'. This isnt China.
 
JPSTORM said:
Noticed over the last few days that my slave inverter has been running quite a bit warmer than the master. On closer inspection, my one fan on the slave died.

I've been one of those 'idiots' that decided some airflow couldnt hurt and put two PC fans under each inverter, blowing upward. Cant remember the exact temps, but something along the lines of 'as soon as one of them get to 56 degrees on the DC side, switch on fans and only once lowest temp goes below 42 degrees, switch off'.

So yeah, one of the fans failed and I immediately saw it.

The temps are high, I know, but I WORK my inverters during the day. The slave saw 83 degrees today, where highest on the master was about 70.

I'll be replacing the fan over the weekend. I prefer to call it 'insurance, rather than ridiculous and if the manufacturer wanted fans, they would put it in'. This isnt China.
Click to expand...
What fans do they use ? 220v or 12v?
 
You must log in or register to reply here.
Back
Top
Sign up to the MyBroadband newsletter
X