Join Date: Oct 2009
Thanked 107 Times in 104 Posts
Id agree a dynamo system has a regulator that ensures the dynamo output is only switched to the battery when its above the battery voltage (otherwise the battery will feed the dynamo as a motor!) and a second component that disengages the feed when the battery voltage reaches a certain level (typically 14 or so volts) The black box regulator normally has 2 coils in it to do these two functions.
Its possible the pre regulated output has been fed back to the second battery but it would then have to have its own regulator or you risk massively overcharging the second battery.
Dynamos are less effective at low revs so the move the an alternator would be a smart choice. In which case the stock regulator would need to be removed and bypassed and a splitter added to ensure the two batteries are isolated from each other.
When measuring a dynamo system you need the revs to be quite high to get a decent output tick over or a low rpm won't produce much output.
Europe. We're not out till we're out. Until then we're still in. Mind you out is looking a lot like in but with less benefits!!!