I'm really interested in building my own charger. This thread rocks!!! I was thinking that it might be almost as simple to use a buck/boost regulator instead of a voltage doubler and then a buck and then the pack voltage capability would be pretty much anything people could want (I'm shooting for a 360V nominal pack in my car). Am I missing something that would make this technically infeasible assuming a PIC is used to control the PWM and the charger algorithm? This is pretty much what I'm thinking of:
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