My dock neighbor is doing this. While I understand the appeal conceptually it seems to me that the numbers don't quite add up with a conversion. The cost of the conversion is very high. Too high to make sense economically. The range of the motor under power is not that great. The upside is that the batteries can be recharged anywhere (for cruisers) and the motor is low maintenance. I can also see the appeal for weekend sailors in the ease of use of a motor. With all that said it is very expensive. Also, beware who you get to do the conversion for you. This is a fairly new thing and there are folks out there who do not really know what they are doing.