So i.ve happened to acquire a top of the range big 24v 3000/6000 inverter, every cheap one i have had before has only had 1 red and 1 black terminal to connect the battery leads to, simple enough, this new inverter has 2 red and 2 black, whats the procedure for connecting this up ?
chaversdad:
whats the procedure for connecting this up ?
RTFM
Im sure if you google the make/model youll find the manual
peirre:
chaversdad:
whats the procedure for connecting this up ?RTFM
Im sure if you google the make/model youll find the manual
I have, and it doesnt, it just says connect to 24v power source, does that mean i have to run 4 cables from the battery? Only use 2 of the terminals? Join 2 reds and 2 blacks together so i have 2 singles going to the anderson plug? Anybody got a sensible suggestion
chaversdad:
So i.ve happened to acquire a top of the range big 24v 3000/6000 inverter, every cheap one i have had before has only had 1 red and 1 black terminal to connect the battery leads to, simple enough, this new inverter has 2 red and 2 black, whats the procedure for connecting this up ?
I would guess that 1 set of leads for each battery
Assumption time, for it to deliver that sort of power it needs a good supply, and one pair of cables won’t be enough, so it requires two sets, so that’s 4 leads from the batteries.
Four leads will enable it to run at its max of 6000,
Two leads for 3000 max.
biggriffin is almost certainly correct.
Is there any writing on the outside of the cables ? It might give you the conductor size in mm2
A 6000w inverter is going to pull about 250 amps and you need a minimum 40mm2 conductor but they may have chosen to put 2 x 25mm2, to give you the choice of only running it at 3000w and also because the 25mm2 cable will more flexible to route. Surprised the manual does not say.
A cable with 40mm2 conductor will be about 13mm outside diameter, 25mm2 will be 10, or less.
Would I be right in saying that the time you can operate it at 6000w is limited anyway because of the heat the inverter itself produces ? That probably depends on the quality of it, like welders, but you sat it’s a quality one ?
I am not an electrician so all the above is just from my experience, and not guaranteed 
Like this? Different size though.
ato.com/2500-watt-power-inverter
Two smaller cables are easier to route than one with twice the cross section, so maybe that is the reason for the design.
.
I`m not an electrician, so check this first:
i-p/v
6,000watt / 24v = 250amp!
So, thats 125 amp per terminal. From this [solar-wind.co.uk/info/dc-ca ... calculator](https://www.solar-wind.co.uk/info/dc-cable-wire-sizing-tool-low-voltage-drop-calculator) Youll need 70mm.sq cross section for 125amp, 24v, 5m long, with 2% loss. (approx 10mm diameter for copper conductor alone)
ebay.co.uk/itm/262632644076 … Sw-itXtWX3
From eBay £8 per metre.
Daresay someone will check my workings, and correct my errors.
Ed. Posted just after Manski.
Thanks for the maths lessons 
This is the one i have, it has no packaging or manual but for a 150 quid i couldnt refuse it
Ah so it’s actually a 3000w inverter that will cope with up to 6000w for 2 sec only, for example when a motor starts if you were using something that needs a big current on start-up, I think maybe microwaves do that ? ie a big power demand just to start and then drops. I suppose it is possible that one cable will be enough if you only use it for resistive loads, like kettle, warming oven etc. as they do not surge at the start but you would need to know the size of that cable / speak to the manufacturer. Hard to see you going past the 3000w though with a microwave. Why not just send them an email and say you have one of these in a truck and the cable is damaged / you want to extend the cable and are the 2 necessary / what size should I use ? Like I said I am not qualified to give advice but have joined lots of reds to reds /blacks to blacks and not blown much up yet.
You done well for £150 quid whatever. (Assuming it works…)
Cheers Manski, i have 5 mts of red and black 35mm cable with an anderson plug fitted to go on so should be plenty i think, oh and it definately works ,its brand new, it fell out of the warehouse back door rather than the back of a lorry 