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View Full Version : Dual alternators - snowplow benefit



Mark Rinker
11-19-2010, 05:44
My 2009 has the dual alternator option. Had a chance to plow snow with it last weekend for the first time, and boy does that help with keeping the batteries up while running the plow hydrualics!

I never saw the voltmeter vary from +14V, never a flicker of the headlights, nothing...even when subjecting the plow motor to an intentional left/right/up/down torture test of five minutes or more.

Same test on single alternator, dual battery setups would have seen dimming lights and voltage drop on the system as the plow motor heated up and became less efficient.

Thumbs up for 240amps of charging power, and dual Delcos!!! :D

Heartbeat Hauler
11-19-2010, 19:24
I am trying to figure out this issue with my cousin's '89 Chevy gasser plow-truck. I thought about adding a second battery, but several folks have mentioned upgrading to a 200 amp alternator. I think I will try it if I can figure out the brackets for it. Good to know that big alts. help! :D