Quote:
Originally Posted by NiHaoMike
The peak voltage for 120v AC is right about the correct charge voltage for a 144v lead acid pack! In fact, I remember reading about someone who made a large UPS with little more than 12 12v batteries and a bridge rectifier.
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I don't think that's correct. The bridge rectifier shouldn't put out the peak voltage of the ac sine wave; it should put out the *average* voltage minus Vf of the diodes (0.637*Vpk -1.4). Feel free to correct me if I'm wrong.
The old K&W BC-20 I have a passing familiarity with was incapable of charging above 108V packs from the standard ac line. It required a Line Booster to charge 120V packs.