Frunk Auxiliary Power Tap / Power Feed Specs (48V and 400W)

[scottf200]

They claim 400 watts for the frunk in the latest T-Sportsline video.
(400 watts) / (48 volts) = 8.3 amperes

T Sportline: "Confirmed with Tesla, both [roof | frunk] auxiliary power taps are rated to 400 watts. Both are protected with solid state circuits, if you exceed 400w, they shut off."

Title: Dissecting a Cybertruck Part 2! Tesla Auxiliary Power Under Frunk, Inspection & More, first look
7:26

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[BigAl]

Is this for winch control?? Or front fog light bar??



400watt rated… lots of power for your needs… snow plow anyone??

 

[Art138]

Very informative video.

 

[JBee]

400W is not a lot.

I'd assume that the previous indication from the HTML decode, that these were 2.3kW were incorrect. 400W is usable for lights, front fridge and other smaller users, but these aren't significant enough for a decent winch, now to run hydraulic for lifting a front snowplow etc.

Shame.

But it does look like there is a bit if volume to put something flat under the frunk liner. Like another custom battery, a slimline flat winch etc.

Best way forward for these higher power accessories would be installing a dedicated battery and charging it from the frunk power feed connection.

That way you also avoid something nasty shorting the 48V and you losing SbW.

 

[Jow]

nice job dude

 

[Timelord]

I'm guessing these are just the 2 switched accessory taps. I very much expect an unswitched DC tap of significant rated capacity and most likely 48v.

 

[Gurule92]

400W is not a lot.

I'd assume that the previous indication from the HTML decode, that these were 2.3kW were incorrect. 400W is usable for lights, front fridge and other smaller users, but these aren't significant enough for a decent winch, now to run hydraulic for lifting a front snowplow etc.

Shame.

But it does look like there is a bit if volume to put something flat under the frunk liner. Like another custom battery, a slimline flat winch etc.

Best way forward for these higher power accessories would be installing a dedicated battery and charging it from the frunk power feed connection.

That way you also avoid something nasty shorting the 48V and you losing SbW.

This finding ended up being on the included features list

Here

So I wonder if maybe only tesla accessories can access full power? Or maybe roof has higher Amp rating? I didn't watch the whole video but how did they check the wattage?

 

[scottf200]

I'm guessing these are just the 2 switched accessory taps. I very much expect an unswitched DC tap of significant rated capacity and most likely 48v.

Yes, from the above video and the previous one to that they correspond to the ones in the "Outlets & Mods" UI called "Power Feed".

 

[BlackCyber]

Perfect for my espresso machine for my Italian brothers at job sites !

 

[scottf200]

I didn't watch the whole video but how did they check the wattage?

-->>> T Sportline: "Confirmed with Tesla, both [roof | frunk] auxiliary power taps are rated to 400 watts. Both are protected with solid state circuits, if you exceed 400w, they shut off."

 

[Timelord]

400W is not a lot.

I'd assume that the previous indication from the HTML decode, that these were 2.3kW were incorrect. 400W is usable for lights, front fridge and other smaller users, but these aren't significant enough for a decent winch, now to run hydraulic for lifting a front snowplow etc.

Shame.

But it does look like there is a bit if volume to put something flat under the frunk liner. Like another custom battery, a slimline flat winch etc.

Best way forward for these higher power accessories would be installing a dedicated battery and charging it from the frunk power feed connection.

That way you also avoid something nasty shorting the 48V and you losing SbW.

That control bus will already be protected and isolated in any vaguely reasonable design let alone safe.

With an already hefty 48v bus, bumping it up a bit more to provide an unswitched and protected high power power tap shouldn't be significant relative expense and extreme oversight to not include.

 

[Gurule92]

-->>> T Sportline: "Confirmed with Tesla, both [roof | frunk] auxiliary power taps are rated to 400 watts. Both are protected with solid state circuits, if you exceed 400w, they shut off."

So they like called someone? Seems legit I guess

 

[scottf200]

So they like called someone? Seems legit I guess

Well they do have two Cybertrucks in their shop and are doing a lot of videos so it seems like they have some "connections."

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