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Renogy 12V 3000W continuous 6000 surge pure Sine wave inverter /cable size

Rukesh

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Sep 2, 2022
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Hi. I am new to this inverter world . I am so confused right now. Can anybody help me please. I have recently bought this inverter. I have this 3 x 12V 126AH battery . I am planning to parallel all 3 of them. Can i know the size and length of cable i need to connect between inverter and battery. And size and length of cable for parallel three batteries. And can i knowwhich Amp Fuse i need . I will be using 3000 watt for few minutes while boiling water . I have attach some information .please help me out
 

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3000 ac watts / .85 inverter efficiency factor / 10 volts low cutoff = 352.941176471 service amps
352.941176471 service amps / .8 fuse headroom = 441.176470588 fault amps

Each battery has to provide 1/3 of 352.941176471 service amps which is 117.647058824 amps.
I wonder if those batteries can handle that kind of load for even just to boil the kettle.

Do you have any other components or is it just the inverter and batteries?
I ask because if you have other components it will effect the over all system topology.
 
3000 ac watts / .85 inverter efficiency factor / 10 volts low cutoff = 352.941176471 service amps
352.941176471 service amps / .8 fuse headroom = 441.176470588 fault amps

Each battery has to provide 1/3 of 352.941176471 service amps which is 117.647058824 amps.
I wonder if those batteries can handle that kind of load for even just to boil the kettle.

Do you have any other components or is it just the inverter and batteries?
I ask because if you have other components it will effect the over all system topology.
Hi. I have a 2 pair of red and black cable 60CM . In each cable there is written 100A which came with inverter. I have inverter and 2 pair cable , 3 batteries . That is all i got now. No fuse.
 
I suggest this topology.
Use only pure copper wire with 105C insulation

Use one of these

Watch this video to learn how to add a 400 amp mega fuse to the inverter branch circuit.

Use 4/0 awg wire(120mm2) wire for the inverter circuit.
That batteries are each connected to its own un-fused branch circuit.
The batteries should be fused as close as possible to the battery positive terminal.
Use a 200amp anl fuse.
The battery circuits should all be the same length to make the path resistance of each battery is close to even as possible.
This will allow each battery to share the charge/discharge current as equitably as possible.
Use 2awg(35mm2) wire for each of the battery circuits.
 
I suggest this topology.
Use only pure copper wire with 105C insulation

Use one of these

Watch this video to learn how to add a 400 amp mega fuse to the inverter branch circuit.

Use 4/0 awg wire(120mm2) wire for the inverter circuit.
That batteries are each connected to its own un-fused branch circuit.
The batteries should be fused as close as possible to the battery positive terminal.
Use a 200amp anl fuse.
The battery circuits should all be the same length to make the path resistance of each battery is close to even as possible.
This will allow each battery to share the charge/discharge current as equitably as possible.
Use 2awg(35mm2) wire for each of the battery circuits.
Thank you so much for your help. I will have look. I will come back i i need help again.
 
Hi. I have got few items on amazon. Will this be alrite for me? The cable is 2 AWG 15cm to parallel battery. The cable for inverter to battery is 1ft 5/16 lugs both ends. The fuse is 250AMP.
 

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The max fuse ampacity for 2 awg is 200 amps.
The fuse you link is 250 amps so that is not good.
Make sure the lug sizes match on both ends.
 
Thank you. I will look for 200amp fuse and make sure the lugs match . I have looked online lynx power in is 30 min drive from place. Once again thank you for your help.
 
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