All good replies this far. I would recommend looking for the greatest output solar cell/array you can find that will fit in the designed area available. Next check the motor and see if is a brushless type motor. If not see if you can find a brushless motor with the same ratings. You end the problem of brush wear and I believe that in most applications the brushless motor will draw less current (be more efficient). A good cell/array with a brushless motor and you are set for many years of sunny comfort. Drew Meyer --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------