I have a crazy idea ..
All generators outputs will be rrctified and filtered without any
stabilisation at all .
Now a transformator with many primaries one for each generator
will genetrate square wave with stable amplitude.
Each primary will be fed by a sqare wave generated from its generator .
All primaries will be in phase .
The output of the transformer will supply squre wave with varying amplitude .
That output square wave will be rectified and filtered
and will chrge the batteries with a charging control .
How is that ?
Elico