External Temperature Controller for an Inverter.

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Introduction: External Temperature Controller for an Inverter.

About: As of April 2017 I have decided to no longer post on instructables. The fact that several of my published works have been removed without my consent is inexcusable. Also the insult of an author having no co...

My off grid home uses powerbright inverters and as much as I love these units, the internal cooling fans fail pretty fast.

Here is how I installed an external temperature controller and fan for my inverter.

Step 1: Controller.

This controller runs off 24vdc and is fully programmable. The Centre led shows the real time temperature. The left led is turn on temperature. The right is turn off.

Step 2: Fan.

I used a 24vdc brushless fan stuck externally to vent the inverter.

Step 3: Sensor.

The thermal probe I glued onto the case.

Step 4: Wiring.

I used the onboard relay to switch the 24vdc supply to the fan. The negatives for fan and controller are the same. Crimp lugs I used to provide supply from the inverter's power lugs.

Step 5: Completion!

At a turn on of 38C and off 33C, the new fan controller is operational and hopefully should give long service life.

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    I got mine off Amazon.com. Just search for programmable temperature relay or programmable temperature controller. You will get a range of DC and AC powered devices.