I have a Bosch SB200. 200 amp school bus alternator. and ive run down the road with my Dash A/C, rear A/C, and a portable 1000 watt A/C (on my inverter) running and didnt kill the electrical system or the alternator.. I have the 2 regular group 31 engine batteries plus 2 Deep cycle AGM batteries.. the isolator connects htem all together and charges them with the one alternator.. only time I noticed my voltages drop below 13 volts was when I would idle down... the alternator couldnt keep up with all those loads at that point..
-Christopher
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