What size fuse for inverter (2 Viewers)

[Roadroamer]

thanks for all the help I think I will fit a 300a fuse/circuit breaker

 

[HandyAndy]

Never going to work at 3000 watts with that size fuse.

anything over 1536 watts and he would get a mild fizzing sound followed by darkness / silence

 

[TheBig1]

the reason for fitting a large inverter is I had a 2500w 5000w inverter which went bang using a 1500w coffee maker and the supplier said it is not man enough for it so rejected my warranty claim

cheaply made chinese rubbish then

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[TheBig1]

the reason for fitting a large inverter is I had a 2500w 5000w inverter which went bang using a 1500w coffee maker and the supplier said it is not man enough for it so rejected my warranty claim

cheaply made chinese rubbish then

 

[Lenny HB]

OK you've made your point.

 

[TheBig1]

OK you've made your point.

you picking on me for my stutterrrrrrrr?

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[Lenny HB]

you picking on me for my stutterrrrrrrr?

Jim tells us it can't happen with the new software so how do you do it?

 

[TheBig1]

Jim tells us it can't happen with the new software so how do you do it?

wish I knew Lenny and could fix it

 

[Bessy765]

Rough guide you will use 28 amps @ 12 volt d.c. To produce 1 amp @ 230 volt a.c. This allows for inverter efficiency and voltage drop in cables.

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[HandyAndy]

I'd add to that, the harder you push your inverter, the larger those losses will be too.

 

[pappajohn]

I phoned the importer of my inverter to check fuse size , they told for my 1500w unit it was a 150amp fuse
so I’m assuming 500w would be 50amp but lennys sizes sounds good to me

It's easy enough.....
Watts ÷ volts = amps

500w ÷ 12v = 41.66a (at full load)

To prevent it blowing prematurely a 50a fuse will do but won't protect 6mm2 cables.

 

[Lenny HB]

It's easy enough.....
Watts ÷ volts = amps

500w ÷ 12v = 41.66a (at full load)

To prevent it blowing prematurely a 50a fuse will do but won't protect 6mm2 cables.

Plus 15% for inverter inefficiency.

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