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relay for power inverter

Printed From: the12volt.com
Forum Name: Relays
Forum Discription: Relay Diagrams, SPDT Relays, SPST Relays, DPDT Relays, Latching Relays, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=128837
Printed Date: May 15, 2025 at 8:33 AM


Topic: relay for power inverter

Posted By: jibjabhater
Subject: relay for power inverter
Date Posted: October 13, 2011 at 11:37 PM

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.




Replies:

Posted By: oldspark
Date Posted: October 13, 2011 at 11:39 PM
1100W => 110A so 150A is fine.
With a 150A fuse/breaker in case it overloads.


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