Suitable Fuse for a 1500 PSW Inverter | MotorhomeFun | The Motorhome Support and Social Network

Suitable Fuse for a 1500 PSW Inverter

Jun 19, 2014
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Hi I am looking to fuse on the DC side a 1500 PSW Inverter running small items ie tv,mobile phone charging, electric bike charging, laptop .Is there a formula for working out the size of fuse. All help appreciated. Robert.
 

scotjimland

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Fuses are fitted to protect the cable from overload / overheating.. so the fuse size should be calculated to the max safe full load current of the cable..

A 1500 watt inverter on full load will draw: w/v = 1500/12 = 125A

do you know what size the cable is .. ?
are you using what has been supplied or fitting your own ?
and if so what is the length ?

For example.. if your cable run is 1 mt you will need 25mm cable (acceptable loss of 2%)

that should be protected by a 125A Fuse.

you can calculate cable sizes here http://www.solar-wind.co.uk/cable-sizing-DC-cables.html
 
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robpam47
Jun 19, 2014
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Thanks very useful info have bookmarked site. Robert

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