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inverter on with car on w/o switch


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dkeshish 
Copper - Posts: 92
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Joined: December 01, 2005
Location: United States
Posted: June 11, 2007 at 5:05 PM / IP Logged  
Hello I am trying to wire my car inverter to turn on when my car is turned on. Instead of constantly opening the trunk to turn the inverter on and off I would love to be able to not worry about "oh did I leave my inverter on? did I turn it off". Just curious if I can wire my inverter to run when I turn my car on and off when the key is off...  I know to directly wire it to the battery so this is where I am stuck... THANKS ALL.
still_walkin 
Silver - Posts: 644
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Joined: April 18, 2007
Location: California, United States
Posted: June 16, 2007 at 3:27 AM / IP Logged  
to your fuse box pick a curict that you can use either when the car is completely on or in accesory mode .liek if you have power locks that fuse requires the car to be comletely on . make sure you fuse the invertor
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stealthone 
Member - Posts: 26
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Joined: April 01, 2006
Location: United States
Posted: July 20, 2007 at 3:56 AM / IP Logged  
If your inverter draws less than 30 amps, you could simply break the power feed from the battery with a standard automotive (black cube)relay that is wired to an ignition-on circuit. That way you would need to have the ignition on to power the relay and in turn the inverter.
KPierson 
Platinum - Posts: 3,526
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Joined: April 14, 2005
Location: Ohio, United States
Posted: July 20, 2007 at 8:06 AM / IP Logged  
It all depends on the size of the inverter......
Kevin Pierson
js305 
Member - Posts: 26
Member spacespace
Joined: April 29, 2007
Location: United States
Posted: July 22, 2007 at 11:12 PM / IP Logged  
There is also a 70 amp relay available that is much like the standard 30 amp relay you are referring to. The main difference is that two of the connections have to be done with .375 inch terminals. One company that markets this relay is NTE. Their part number is R51-1D70-12F I believe.
As you say, the best way to use the ignition to turn things on and off is with a relay with a low amperage coil and the points wired directly to the battery. Especially in newer vehicles where computers and other electronics are sensitive.
Joe in Texas

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