Veggie and I have been conversing in the background. I'll post this here so everybody has the same information.
There is a mistake in the Changfa manual. I faithfully hooked up my electrics according to the book and managed to cook a battery by feeding it unregulated, unrectified A/C.
Here is a scan from the Changfa manual with a red circle on the error.
Here is my corrected version of the Changfa manual. Blue indicates an optional connection
for more current. I added red and green to clarify what wires are connected to the regulator
Finally, here is my own schematic of the same thing.
I hope this helps others avoid problems when they are hooking up their electrics.
--
Martin