mdkelley wrote:
From another forum
MaxxFan top voltage = 13.5V per Airxcel, Inc.
Once that fan gets to 13.5 is when its starts to cause concern.
Derek Hicks
Technical Assistance Coordinator
RV Products, a division of Airxcel, Inc.
3050 N. St. Francis
Wichita, Kansas 67219
Office: 316.832.4357
Fax: 316.832.3417
www.Airxcel.com
Well, for a "device" that is supposed to be designed for a RV that is certainly a stupid voltage rating.
Most devices designed for 12V use like automobiles are typically designed with the capability of dealing with up to 15V DC..
Not all is lost, one can add one or two diodes in series with the fan positive input lead. Each diode will drop about .6V-.7V, two diodes in series should get you about 1.2V-1.4V voltage drop. So, the fan now should be fine with converter voltages up to 14.7V-14.9V.
You will have to chose diodes that have a high enough current rating for the max draw of the fan.