4200XL - How to run off a 12v car battery
 

Hi,

I'm looking to run my excavator off a 12 car battery, I have attached a photo of the battery I plan to use. I have 5 meters of 12AWG lipo wire I can use. Is it just a case of connecting it to the car battery or should I fit an online fuse? I'm just concerned about the high amps of the car battery as I don't want to damage any of the electronics.

Thanks in advance

Re: 4200XL - How to run off a 12v car battery
 

I CAN'T see the pic(s)

Re: 4200XL - How to run off a 12v car battery
 

I've done this many times with Leimbach excavators... inline fuse is a good idea... but the chinese model will run better with a lower voltage in the 8v range.

Re: 4200XL - How to run off a 12v car battery
 

Thank you for confirming I will definitely fit an inline fuse in that case, what amp fuse would you recommended?

Tried having a look for a 8v battery and can only find golf cart ones which seem expensive so would ideally like to use the car battery. Would a voltage reducer help in this case if there is such a thing?

I've reattached a photo of the specs of the battery but just in case it still doesn't work this is the specs of the battery I have:

Bosch S5 005
610A (EN)
63Ah 12V

Re: 4200XL - How to run off a 12v car battery
 

There's never any documentation of the electronics that come with the chinese models that I've seen... I think the amp esc for hyd pump is something like 125amp. The brushless motor for the pump is overly large & therefore turned back to 19% EPA (approx) in radio settings. 12v car battery will be typically 13,5 to 14,2v full charge. Start with a 10amp fuse... maybe :thinking:

I think it's a diode that's needed to reduce voltage from the car battery... if you know an electrician, he might have something on hand... maybe a light dimmer switch would work, use a voltage meter to set your output.

Re: 4200XL - How to run off a 12v car battery
 

Yeah it is a shame they don't have any documentation for the electronics. I guess that's to be expected with a budget excavator. I will start with a 10amp fuse and see how it goes.

I don't know anyone but will look into it more. That's a good idea maybe a dimmer might work with a volt meter to get to the 8v range. I did speak to someone in Maplins today but he just seemed to say it was over complicated.

Thanks for all your help I will update how I get on once I've tested a few more things.

Re: 4200XL - How to run off a 12v car battery
 

I wonder if something like this would work although seems abit cheap?

http://vi.raptor.ebaydesc.com/ws/eBa...32&cspheader=1

Re: 4200XL - How to run off a 12v car battery
 

Dimmers don't tend to like DC.
Diodes work, but the volts sag with discharge.
How about an adjustable power supply? Something that lets you do 6-12v should do.

If you've got an amp clamp, try to *really* load up the machine hard and see what it can pull from the battery, then add on to that number. If you can make it pull 10 amp, go with something capible of atleast 15a.

One of my models has (4) servos that can stall at 2.5a each, so you need to bring enough current for everyone. it's a shame you don't have specs on any of the components or we could give a real answer.

Something like this, probably the 12a or another bigger one
https://www.amazon.com/DROK-Numerica...RG9?th=1&psc=1

If you want to cheap out and go plugged into the wall outlet, you can hack an old computer power supply with a little creativity.