400W 8A buck converter: regulating power from solar panel to attic fan

[Gary February 8, 2019 at 10:31 pm Post count: 0]

#35475 Reply |

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!

[DrokKeymaster February 14, 2019 at 9:36 am Post count: 2971]

#35505 Reply |

Hello Gary，
This item doesn’t have under voltage setting.
8A is the max output current it can handle. Output current is mainly decided by load.
Unless there is short circuit or other issue, the max output current will not be over 8A.

Any more questions, please kindly contact us.
Best regards.

[Author]

Posts