relay for power inverter

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jibjabhater

Member - Posts: 12

Joined: July 10, 2008

Location: Alaska, United States

Posted: October 13, 2011 at 11:37 PM / IP Logged

The project: Install a2200 watt power inverter (I will be running around 1100 watts regularly) in my diesel truck and have it switched on to run when the truck is running.

My question is, since this will be a switched power source ( when truck is running) what size relay should I use. I have checked some of the stats and I can get a reasonably priced 300 amp relay for around 25 bucks. My problem is they state it is only rated 150 amps continous and 300 surge. I saw the next step up was a 500 amp. Should I follow the go big or go home philosphy? Thanks for any help you can send my way.

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oldspark

Gold - Posts: 4,913

Joined: November 03, 2008

Location: Australia

Posted: October 13, 2011 at 11:39 PM / IP Logged

1100W => 110A so 150A is fine.

With a 150A fuse/breaker in case it overloads.

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relay for power inverter

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