Direct 48V Winch

[btcrealm]

Has anyone looked into connecting a direct 48V winch? COMEUP Winch has 2x 12,000 lb 48v winches (3400W / 4200W).
https://www.comeupwinch.com/products-view.php?ID=64
https://www.comeupwinch.com/products-view.php?ID=63

Sponsored

 

[REM]

The 48v accessory hookups can only output 400 watts. You would need to have a battery for surging, and maybe the accessory power could trickle charge it back up.

 

[tmeyer3]

As @REM said, it isn't the 48v vs 12v that is the only problem. The accessory system just doesn't put out enough power to run a winch, you still need a "cranking" battery--by that I mean a battery that can handle huge current surges.

 

[btcrealm]

Wasn't sure if anyone had played with accessorizing the HV system. I'd be interested in hearing those experiences.

 

[hemiarch]

As I understand it, some pretty wonky stuff is supposed to happen if you put stuff between the high and low voltage systems or so I’m told.

 

[REM]

Wasn't sure if anyone had played with accessorizing the HV system. I'd be interested in hearing those experiences.

Hard no. Extremely dangerous.

Besides the car will rightfully freak out and refuse to operate.

 

[btcrealm]

Hard no. Extremely dangerous.

Besides the car will rightfully freak out and refuse to operate.

At some point Tesla is going to have to allow or integrate higher powered accessories. Adding a bunch of 12V batteries is moving 100% in the wrong direction.

 

[REM]

At some point Tesla is going to have to allow or integrate higher powered accessories. Adding a bunch of 12V batteries is moving 100% in the wrong direction.

There is 9,600 watts of A/C power available from the truck bed for now. But most winch systems have a dedicated accessory battery anyway, right? Or do they mostly tap right onto the battery/alternator of fartboxes ICE trucks?

 

[btcrealm]

There is 9,600 watts of A/C power available from the truck bed for now. But most winch systems have a dedicated accessory battery anyway, right? Or do they mostly tap right onto the alternator of fartboxes ICE trucks?

Pretty much all winches connect directly to the 12V battery in an ICE vehicle. We often oversize the batteries from stock to help with the power for winches and lights.
I connected all accessories through a marine grade switch on my landcruiser running an 0 (or 2, don't remember) gage wire from the battery to the accessory box.

 

[hemiarch]

There is 9,600 watts of A/C power available from the truck bed for now. But most winch systems have a dedicated accessory battery anyway, right? Or do they mostly tap right onto the alternator of fartboxes ICE trucks?

So I guess a relevant question is, does anyone make a portable or mounted winch that runs on 240v ac? The 120v outputs are significantly lower wattage right?

 

[REM]

So I guess a relevant question is, does anyone make a portable or mounted winch that runs on 240v ac? The 120v outputs are significantly lower wattage right?

Found at least one:
https://www.warn.com/3000-acil-winch-93000

Obviously you would have to run a thick portable cable (RV style) the length of the truck to operate it (which obviously isn't ideal) but at least you wouldn't have to mess with an additional accessory battery and figure out how to keep it safely charged and integrated into your frunk.

 

[hemiarch]

Nice. In my mind a winch isn’t used frequently enough to justify keeping it permanently connected in some complicated way to the high voltage pack or occupying half the frunk with a battery that can surge that hard when there is already a very high power 240v plug that can be used.

 

[btcrealm]

Nice. In my mind a winch isn’t used frequently enough to justify keeping it permanently connected in some complicated way to the high voltage pack or occupying half the frunk with a battery that can surge that hard when there is already a very high power 240v plug that can be used.

Right, I ran this for years on my 4x4s.

 

[cybercricket]

I've setup a standard 12V 12K winch powered by two gen2 Nissan Leaf modules. It's a very versatile setup because it can be hitch-mounted on the rear of the truck, or "cable" mounted to the front recovery hooks, or... even used without the truck altogether as a portable winch. Those Leaf modules are 66Ah and can handle up to 5C continuously so that's approximately 4.9kW (6.5HP) at nominal voltage. Given it's only 4 cells in series (4s2p) their health can be monitored manually and no BMS is really necessary but can be added if desired, along with a 400A fuse.

I guess another thing to add - that's approx 1kWh of capacity, enough for about 10 mins of winching at full load.

 

[btcrealm]

I've setup a standard 12V 12K winch powered by two gen2 Nissan Leaf modules. It's a very versatile setup because it can be hitch-mounted on the rear of the truck, or "cable" mounted to the front recovery hooks, or... even used without the truck altogether as a portable winch. Those Leaf modules are 66Ah and can handle up to 5C continuously so that's approximately 4.9kW (6.5HP) at nominal voltage. Given it's only 4 cells in series (4s2p) their health can be monitored manually and no BMS is really necessary but can be added if desired, along with a 400A fuse.

I guess another thing to add - that's approx 1kWh of capacity, enough for about 10 mins of winching at full load.

I've seen people talking about those batteries. They' re really popular for a lot of DIY projects.
Interesting approach. How much does that unit weigh and how long does it take to charge?

Sponsored