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diy solar

Giandel inverter fans need mounted horizontal apparently

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I was doing maintenance on my setup and wanted to see if I could run with the higher output into my EV so I cranked the input of the EV to 12A at 120V to see how everything would work. While investigating the system for any hiccups and such, I noted it was really quiet. Both fans on my inverter apparently retired. Researching these fans allowed me to identify them as sleeve bearing fans. Apparently sleeve bearing fans are supposed to stay horizontal. Mine were mounted vertical. I did get a good solid two years with these in the AZ outdoors. Just be aware of the mounting requirements and such. I am replacing them with dual ball bearing fans that do not care about orientation and may last longer anyways.
 
The ball bearing fans will also be quieter and consume less power when running. Just make sure to compare CFM for apples to apples.
 
robbob2112 said:
The ball bearing fans will also be quieter and consume less power when running. Just make sure to compare CFM for apples to apples.
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Ball bearing fans are almost always more noisy than sleeve bearings. Especially after year or two of operation. Balls roll and rattle over every nanometer imperfection in the bearing races causing noise.

For the fans I’d buy Sanyo San-Ace. These seem to come out of 10-20years old server equipment still in working condition.
 

Cooling Fan Noise - Sleeve Bearing vs Ball Bearing

Introduction Quite often in low-flow electronic cooling fans for computers, where the aerodynamic noise is low, the predominant noise emitted by the fan is generated in the bearing system. This type of fan usually has either an oil-impregnated sleeve bearing or ball bearings. Both bearing...
www.comairrotron.com www.comairrotron.com

Interesting part was that ball bearing fan can be damaged by rough handling making it noisy and shortening its lifetime.
 
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