The other thing is you will burn the motors and speed controller out if you keep running it on 12 volts. Millions of trucks use 24 volt alternators so should be fairly easy to come by.

Here is one
http://www.ebay.com.au/itm/Deutz-Bosch-Alternator-24v-55-amp-/322097465818?hash=item4afe8149da:g:wNYAAOSwKtlWlC~X
I also have a new alternator in the shed been there for years,I was told it was off a Volvo. It is a fairly big alternator so it could be a 24 volt one, not sure how to tell, might have to get Mark to look at it. You are welcome to that one if it is suitable

Last edited by NormK; 14/05/16 06:53 AM.