It might be of interest for cars using Dynamo's an Electronic regulator
is now available which offers significantly improved current from the
dynamo & improved regulation for the battery.
A 12 volt system could obtain 25 amps using this regulator.
If you are interested contact a Martin Grindrod on
< www.custompowerdesigns.co.uk > .
They cost £65 each & can be 6 or 12 volt & be used on motor bikes.
Hope this helps Robin Woolmer