brianshalerI have some wind generators and lithium batteries. There's a regular that sends current to heating elements (dump resisters) to avoid overcharging the batteries. While I can get like 15amps out of them, there can be a voltage drop of ~0.5v over the mondo 0-gauge cable that means over 80% charge it'll dump anything more than 5amps because the voltage at the regulator shoots up.
I guess the critical design flaw is that the regulator senses the output voltage over the load circuit, when a separate sensor circuit could get a more accurate reading of a distant battery with a tiny wire. Kinda makes me want to try building a rudimentary regulator that just trips a relay between the batteries & resistors.