Newbie for electronics here. I’d like to regulate the voltage I feed into a solar-powered attic fan (no battery). The panel provides 44V and about 9A when in full sun; the fan motor is rated for 1-38V. I don’t have other fan specs but when I’ve run it at full speed using a power supply it pulled about 3a at 29V (that’s speed is much faster than I want it to run when installed).

First, does this buck have under voltage lockout? That will help at sunrise and sunset when the voltage is marginal.

Second, am I at risk for burning up the converter? The converter is rated at 8A, which the load would never pull….but where I get confused is where the panel can provide 9A. Am I correct to assume that the converter would not ever see 9A, but only see the same current as the load draws? Since I already burned up a different converter (rated to 43V…dumb of me to try it), I don’t want to make another mistake…

Here’s the direct link for this specific device: https://www.droking.com/dc-power-supply/dc-buck/400w-nc-voltage-regulator-power-supply-module-dc-6-65v-to-0-60v-8a-buck-adapter-charger-voltmeter-ammeter-capacity-meter-time-meter

Thanks for any advice!