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how big of an inverter?


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feb2009 
Member - Posts: 1
Member spacespace
Joined: February 18, 2009
Location: Pennsylvania, United States
Posted: February 18, 2009 at 5:39 PM / IP Logged  
I want to run a 3.5 amp drill off of an inverter that is hooked onto my ATV.
How big of an inverter do I need(they sell them in watts)?
Can the ATV battery handle that load?
i am an idiot 
Platinum - Posts: 13,666
Platinum spaceThis member consistently provides reliable informationspace
Joined: September 21, 2006
Location: Louisiana, United States
Posted: February 18, 2009 at 8:10 PM / IP Logged  
3.5Amps X 120Volts = 420Watts   What are you going to be drilling?  What size and type of drill bits will you be using?
wiringfool 
Member - Posts: 20
Member spacespace
Joined: October 22, 2006
Location: United States
Posted: February 19, 2009 at 10:58 PM / IP Logged  
Hi just a little extra watts never hertz.Get a little bigger than that ,for loaded drill and startup current
wiringfool eieioztztzt
Mad Scientists 
Silver - Posts: 380
Silver spacespace
Joined: February 07, 2004
Location: United States
Posted: February 21, 2009 at 1:48 PM / IP Logged  

Determining current for an electric motor rquires taking into account power factor.. First thing I would do is take an actual measurement of the current.. this will give you a better idea of inverter size. I have a 1k watt inverter.. I wouldn't use anything smaller than that.

Moot point anyway.. the ATV charging system and battery won't survive long with that kind of draw on it. I'd either carry a big deep cycle battery on the rack, or a small generator, unless you're talking about 1-2 small holes.

Jim


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