Battery backup to 6V gen?
Hi, I'm running a 6V, 3W light setup (Union brand). What I'm interested in is adding battery backup for illumination at slow/no speed, as well as a redundant system in case of gen. failure, plus if I just want to be lazy and let Duquesne light do all the illumination work, lol.
I happen to have 10, Ni-mh batteries that output ~1.35V each. I was thinking that I'd wire 4 of them in parallel with the gen, and at lower speeds, the batteries would "win" the voltage war and drive the lights. At higher volts, the gen would win.
1. Do I need to put a diode coming off the batteries? (At high speeds, the gen would otherwise attempt to "charge" the batteries, and I'm not aware if there'd be an overcharge concern.)
2. Do I need to put a diode coming off the gen?
3. Does this sound otherwise workable?