Battery-inverter cable.

[simsy56]

I have bought a 1500/3000w inverter, but I need longer cables from the battery to the inverter. I believe the cable is 1/0awg and I could do with approx 1m length of black and red. Where do I get some please? I need 10mm eyes at both ends too.

Thanks,

Craig

 

[Steve and Denise]

i Have 2x 2mtrs of 35 mm sq here very flexible £20 posted if any good

 

[100brian]

I have bought a 1500/3000w inverter, but I need longer cables from the battery to the inverter. I believe the cable is 1/0awg and I could do with approx 1m length of black and red. Where do I get some please? I need 10mm eyes at both ends too.

Thanks,

Craig

Hi Craig.
Auto Sparks South Quay they will put the ends on also. Think the number is 613161
Brian

 

[Jaws]

I have bought a 1500/3000w inverter, but I need longer cables from the battery to the inverter. I believe the cable is 1/0awg and I could do with approx 1m length of black and red. Where do I get some please? I need 10mm eyes at both ends too.

Thanks,

Craig

When I wanted a metre of suitable cable I just went to the local small car shop and bought a decent pair of jump leads.
They also had the 10mm eyes in stock
I cut off what I needed, refitted the clamps to the jump leads and sold them on for what they cost

 

[Stealaway]

Halfords? Not be cheap though.

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[Richard n Ann]

Ebay?

 

[pappajohn]

I dependant motoring shop.
It's the kind of size used by the boy racers for their onboard music amps.

 

[100brian]

Also auto electrical on the old castletown rd in Douglas.

 

[olley]

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[GPW]

but I need longer cables from the battery to the inverter. I believe the cable is 1/0awg

The installation instructions of a decent inverter will give you a small table of length vs thickness for cables to use, if you don't have the instructions see if you can download some for a good inverter of the same power you are using and follow them.

If in doubt for a 12V system I'd not go lower than 25mm thinwall. I say thinwall because for house wiring a 2.5mm2 wire is 2.5mm of the copper, but much automotive wire appears to include the insulation in that figure now, so 25mm thinwall is the stuff to get.

But look for instructions for any similar power inverter first to keep if not just safe but efficient too. Also if you lose (for example) 1V in your cable the inverter will switch off earlier as it will think your battery has 1V less than it really has in it so always try to go thicker, even if you have to pare down the ends to fit.
On eBay you can specify pipe eyelets to be fitted too, but you can also buy them and solder them on yourself if so inclined.

Also buy and insert a decent 150A fuse or so at the battery end in case of wire chafing shorts etc.
1500W from 12V = 1500/12 = 125A draw.

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[autorouter]

I believe the cable is 1/0awg and I could do with approx 1m length of black and red.

1 AWG is 42mm2, 0 AWG is 53mm2. Where did you get those figures? It sounds a bit OTT, I'm sure you could get away with 35mm2 for only a metre.

What matters is the total area of copper, so you could use three 16mm2 or two 25mm2 if that's all you have available.

 

[Geo]

If you do go to Halfrauds ask for
Some Fick Stuff

 

[Misterg]

Where did you get those figures?

"0" is also known as "1/0" ~50mm^2 (Likewise "00" becomes "2/0" etc.)

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Pretty meaty in any case!

 

[Ingwe]

If you do go to Halfrauds ask for
Some Fick Stuff

They'll point you to their staff.

 

[HandyAndy]

Personally I'd get the 50mm2 and a 250A fuse.
The inverter (in theory) is capable of pulling 3000w at 12v which is 250 amps on the nose..
This is what I've fitted on my Odesseys in my old camper.
But as Autorouter has already said, if you have enough cable supplied, just run two lengths of it together, it's the same thing as fitting bigger cable.

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[Robert Clark]

Our 2kw Victron inverter specifies 70mm cable

 

[HandyAndy]

Our 2kw Victron inverter specifies 70mm cable

ass covering exercise in case you have the batteries at the front and the inverter at the back of the bus..

 

[Robert Clark]

ass covering exercise in case you have the batteries at the front and the inverter at the back of the bus..

How long is the van ?

 

[HandyAndy]

How long is the van ?

They don't know, that's my point, they want you to fit a cable that will be safe in all use cases so they over spec the cable size to be sure.
You can look up AWG cable sizing charts for amp rating at 75°C and size 1 will be good for 250 amps up to 100ft. (at around 60% duty cycle)

 

[Robert Clark]

They don't know, that's my point, they want you to fit a cable that will be safe in all use cases .

That’s good enough for me

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[HandyAndy]

That’s good enough for me

Bigger is better as they say... until you are the one having to fit the stuff

 

[Robert Clark]

Bigger is better as they say... until you are the one having to fit the stuff

I did fit it

 

[Misterg]

You can look up AWG cable sizing charts for amp rating at 75°C and size 1 will be good for 250 amps up to 100ft. (at around 60% duty cycle)

True, however you need to consider voltage drop, too - 100' of 1 AWG passing 250A will drop quite a few volts!

This page is quite handy

 

[HandyAndy]

True, however you need to consider voltage drop, too - 100' of 1 AWG passing 250A will drop quite a few volts!

This page is quite handy

Appreciated but I don't think we have any motorhomes here 100ft long

 

[simsy56]

All sorted now, found a place to fit the inverter using the supplied cables. Thanks for your help and advice.

Craig

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