I have 2 fans of 20 amps each. I blew a 40 amp fuse on the second day and didn't have a spare battery with me, I hardwired 2 batteries, the relay cut off shortly after. The kit should be rated at 39 amps. For people like me who like to push the limits. However, there is also a positive side: the kit was easy to install and was well priced. I suggest getting a replacement fuse immediately. And a second relay if your fans draw more than 39 amps.
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