Author Topic: Inverter fuse  (Read 354 times)

mulligan

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Inverter fuse
« on: February 25, 2019, 05:59:23 PM »
Greetings all. I have a vertamax 1500 pure sine wave inverter which came with a 150amp in-line fuse on the connection to the battery. My entire house however uses only 21 amps total. Want to know if I change the 150amp fuse to a 30 or 40 amp fuse without causing any damage to the inverter and my system?

mike90045

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Re: Inverter fuse
« Reply #1 on: February 25, 2019, 06:29:37 PM »
It's all in the watts !

12V at 125A = 1500w   Add a little bit more for the internal losses, and your inverter needs 140A @ 12VDC to fully power a 120V AC load.   

So no need to mess with the fuse.    And remember - the cables going to the inverter need to last longer then the fuse, so your cables ought to at least handle 170A or they risk becoming the fuse themselves.
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