External Temperature Controller for an Inverter.

by Mjtrinihobby in Circuits > Electronics

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External Temperature Controller for an Inverter.

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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.

Controller.

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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.

Fan.

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

Sensor.

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The thermal probe I glued onto the case.

Wiring.

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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.

Completion!

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