My home power backup without Powershare solution/ neutral-ground bonding/ transfer switch options/cold temps

[no%X#XMVk65v#cq]

Having owned both a lightning (with 7.2kw plug) and now CT with the 11kw bed plug and having an interlock and old gas generator I have the experience you talk about above (lightning would trip unless I removed the ground connection…which is likely not to code…..CT works great plug and play like my floating neutral generator)

I believe that CT doesn’t have GFCI and instead has a floating ground which is why it has a vault on all editions that have the bed plug as opposed to the lightning…..it is likely a floating neutral and not as safe as the lightning when running power tools in wet environments but also much easier to connect to the house for backup power. That may be part of the reason why it is not on the long range version (could also be cost) because it doesn’t have a covered bed

That is a plausible theory!

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[Protondecay123]

Having owned both a lightning (with 7.2kw plug) and now CT with the 11kw bed plug and having an interlock and old gas generator I have the experience you talk about above (lightning would trip unless I removed the ground connection…which is likely not to code…..CT works great plug and play like my floating neutral generator)

I believe that CT doesn’t have GFCI and instead has a floating ground which is why it has a vault on all editions that have the bed plug as opposed to the lightning…..it is likely a floating neutral and not as safe as the lightning when running power tools in wet environments but also much easier to connect to the house for backup power. That may be part of the reason why it is not on the long range version (could also be cost) because it doesn’t have a covered bed

You are incorrect . It uses the same ground as your box for PowerShare. Go look at the wiring diagram.

 

[JerseyMike]

You are incorrect . It uses the same ground as your box for PowerShare. Go look at the wiring diagram.

I don’t have PowerShare

I believe it uses my house ground when plugged in from the bed plug

 

[Protondecay123]

I don’t have PowerShare

I believe it uses my house ground when plugged in from the bed plug

From Tesla. Hence the discouragement of the “ suicide” connector .
The 240 V outlet in the bed of the Tesla Cybertruck (NEMA 14-50) provides a standard 4-wire split-phase configuration:
• Hot 1 (L1)
• Hot 2 (L2)
• Neutral
• Equipment Ground (EGC)

What is used for ground?

The equipment grounding conductor (EGC) on that outlet is bonded to the vehicle’s chassis. In other words:
• The ground pin connects to the truck chassis.
• The chassis serves as the grounding reference.
• The inverter system references neutral internally in a way designed to meet portable power safety requirements.

Is neutral bonded to ground?

For the bed outlet (portable power mode), the system behaves like many inverter-based generators:
• The neutral is typically not bonded to ground at the receptacle in the same way a residential service panel is.
• The truck functions more like a separately derived inverter source.
• Ground-fault protection and bonding strategy are handled internally by the vehicle’s power electronics.

However, when the Cybertruck is installed for home backup using Tesla’s PowerShare system (with transfer equipment from Tesla), the bonding and grounding are handled at the service equipment according to NEC requirements — not at the truck’s bed outlet.

 

[no%X#XMVk65v#cq]

From Tesla. Hence the discouragement of the “ suicide” connector .
The 240 V outlet in the bed of the Tesla Cybertruck (NEMA 14-50) provides a standard 4-wire split-phase configuration:
• Hot 1 (L1)
• Hot 2 (L2)
• Neutral
• Equipment Ground (EGC)

What is used for ground?

The equipment grounding conductor (EGC) on that outlet is bonded to the vehicle’s chassis. In other words:
• The ground pin connects to the truck chassis.
• The chassis serves as the grounding reference.
• The inverter system references neutral internally in a way designed to meet portable power safety requirements.

Is neutral bonded to ground?

For the bed outlet (portable power mode), the system behaves like many inverter-based generators:
• The neutral is typically not bonded to ground at the receptacle in the same way a residential service panel is.
• The truck functions more like a separately derived inverter source.
• Ground-fault protection and bonding strategy are handled internally by the vehicle’s power electronics.

However, when the Cybertruck is installed for home backup using Tesla’s PowerShare system (with transfer equipment from Tesla), the bonding and grounding are handled at the service equipment according to NEC requirements — not at the truck’s bed outlet.

Where did this information come from? Not doubting you, I just haven't been able to find this published anywhere, and is the exact info I have been looking for to prove what is going on.

 

[Protondecay123]

Google

 

[mongo]

However, when the Cybertruck is installed for home backup using Tesla’s PowerShare system (with transfer equipment from Tesla), the bonding and grounding are handled at the service equipment according to NEC requirements — not at the truck’s bed outlet.

Which is the only option because the NACS connector and UWC don't have a neutral line. The Gateway 3V has a transformer to create neutral from the 240V feed from Cybertruck .

 

[no%X#XMVk65v#cq]

This part specifically I would love to see a source on if anyone has it.

For the bed outlet (portable power mode), the system behaves like many inverter-based generators:
• The neutral is typically not bonded to ground at the receptacle in the same way a residential service panel is.
• The truck functions more like a separately derived inverter source.
• Ground-fault protection and bonding strategy are handled internally by the vehicle’s power electronics.

 

[JerseyMike]

From Tesla. Hence the discouragement of the “ suicide” connector .
The 240 V outlet in the bed of the Tesla Cybertruck (NEMA 14-50) provides a standard 4-wire split-phase configuration:
• Hot 1 (L1)
• Hot 2 (L2)
• Neutral
• Equipment Ground (EGC)

What is used for ground?

The equipment grounding conductor (EGC) on that outlet is bonded to the vehicle’s chassis. In other words:
• The ground pin connects to the truck chassis.
• The chassis serves as the grounding reference.
• The inverter system references neutral internally in a way designed to meet portable power safety requirements.

Is neutral bonded to ground?

For the bed outlet (portable power mode), the system behaves like many inverter-based generators:
• The neutral is typically not bonded to ground at the receptacle in the same way a residential service panel is.
• The truck functions more like a separately derived inverter source.
• Ground-fault protection and bonding strategy are handled internally by the vehicle’s power electronics.

However, when the Cybertruck is installed for home backup using Tesla’s PowerShare system (with transfer equipment from Tesla), the bonding and grounding are handled at the service equipment according to NEC requirements — not at the truck’s bed outlet.

This makes sense…..bed plugs operate like a standard generator….I suspect they can do so because of the tonneau cover built into the truck

 

[pricedm]

My attempt to install a 50a generator inlet plug and use my Cybertruck as power source for my house (2002) unfortunately wasn't successful. As soon as I activate outlets from Cybertruck, its 240v outlet trips. Near zero loads (<20A) from my house.

Generator inlet is wired correctly: neutral to ground show continuity, as desired. If powered from grid, hot 1 to neutral or ground is 120v. Same with hot 2. Hot 1 to hot 2 is 240v.

However, my detached garage's electrical service panel has utility drop/service entrance from grid, as well as sole meter on my property and is labeled "main service disconnect." I think the issue is neutral and ground are not bonded. This service panel sends power to my house, about 20 feet away.

House aka subpanel has neutral and ground bonded: green bonding screw is clearly visible. This doesn't make sense from NEC 250.24 perspective (says neutral and ground must be bonded at first point of disconnect) and is likely why the Cybertruck 240v outlet trips immediately after enabling the outlet.

At this point I am out of ideas and likely will call electrician...

 

[no%X#XMVk65v#cq]

My attempt to install a 50a generator inlet plug and use my Cybertruck as power source for my house (2002) unfortunately wasn't successful. As soon as I activate outlets from Cybertruck, its 240v outlet trips. Near zero loads (<20A) from my house.

Generator inlet is wired correctly: neutral to ground show continuity, as desired. If powered from grid, hot 1 to neutral or ground is 120v. Same with hot 2. Hot 1 to hot 2 is 240v.

However, my detached garage's electrical service panel has utility drop/service entrance from grid, as well as sole meter on my property and is labeled "main service disconnect." I think the issue is neutral and ground are not bonded. This service panel sends power to my house, about 20 feet away.

House aka subpanel has neutral and ground bonded: green bonding screw is clearly visible. This doesn't make sense from NEC 250.24 perspective (says neutral and ground must be bonded at first point of disconnect) and is likely why the Cybertruck 240v outlet trips immediately after enabling the outlet.

At this point I am out of ideas and likely will call electrician...

What does your generator inlet connect to, specifically?

 

[pricedm]

What does your generator inlet connect to, specifically?

Dedicated 50a breaker (top right). 6 AWG. Neutral wire from generator receptacle connected to neutral bus bar; ground connected to ground bus bar.

 

[no%X#XMVk65v#cq]

Dedicated 50a breaker (top right). 6 AWG. Neutral wire from generator receptacle connected to neutral bus bar; ground connected to ground bus bar.

And the 60 amp feeds your whole house?

 

[pricedm]

And the 60 amp feeds your whole house?

60A breaker in right/2nd position is for my Tesla HPWC. The visible 2 black cables at bottom of panel send 150a to the house. Also large wire on left is neutral from this main panel to house sub panel. Incoming 150a from grid is top of service panel.

 

[no%X#XMVk65v#cq]

60A breaker in right/2nd position is for my Tesla HPWC. The visible 2 black cables at bottom of panel send 150a to the house. Also large wire on left is neutral from this main panel to house sub panel. Incoming 150a from grid is top of service panel.

Oh I understand now. In that case it would seem to me that you have the same situation that I do, in that your generator inlet first feeds a panel that is not neutral-ground bonded, and that panel then feeds circuits on another panel that is bonded. I'm not sure why you're tripping on the truck end, but you could try disconnecting your ground from the inlet to that panel and trying it, and it may answer some questions.

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