PowerShare versus Powerwall

[Robruok]

I have an existing solar array without battery backup. To the best of my knowledge, I don't believe the power share and the cybertruck will be able to accept solar power while powering my house. Because of this I think the power wall 3 would be a better option. I'm currently asking Tesla to apply my $2,500 credit from negating the power share equipment towards the purchase of a Powerwall 3, and then using the $4,000 installation credit to pay for the installation of the power wall 3. Does anyone have any information to the contrary in either that the power share will be eventually able to accept bi-directional power at the same time, or that Tesla has absolutely refused in the past too allow you to apply the 2500 credit towards a power wall. I mean I'm trying to give these guys more money.

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[nubbin77]

I am in the same boat. I have solar (10 years in) and would rather go a little further and put in a couple powerwalls, but they are not worth it for me unless I get enough incentives to put against it - the 2500 and 4000 would go a long way toward helping offset some of the cost.

 

[flyinglow]

I don't believe the power share and the cybertruck will be able to accept solar power while powering my house.
[/QUOTE]
This is a bit vague. Not quite sure what you are trying to accomplish. Are you only trying to charge the truck with your solar?

A number of articles suggest this is the most cost effective way to charge your vehicle but I disagree. If you are on a TOU (time of use) rate structure, you want to sell as much solar power as possible to the utility at the highest rates. and charge your truck at the lowest rates. You want to limit your kWh consumption during the peak rate times so it makes sense to not charge the vehicle at those times.

With my utility (NorCal PG&E) that means 3 PM to Midnight on EV rates. Outside of that time period, it doesn't matter when you charge since you are on the lowest rates. You might as well charge starting at midnight to be sure you get whatever charge you need and the truck is available at any time during the day. It also simplifies programing the charger since it starts at the same time every day and you don't need Tesla's bi-directional charger.

As you point out, you can use a Powerwall, although I am not clear when the Powerwalls will be able to charge the vehicle. It seems to involve an upcoming OTA: https://www.tesla.com/support/powershare

The next consideration is whether you want to sell some of the truck's battery power to the utility and "make money" or use the battery for home backup. From my reading, it appears you need the Powershare to do that. However, with the Powerwall, you would not need the universal wall connector or backup switch.

Personally, I want to sell battery power to the utility to help pay for the truck (not so much as to deteriorate the battery excessively).

If someone has more info on this, please chime in.

 

[akenis]

[/QUOTE]
This is a bit vague. Not quite sure what you are trying to accomplish. Are you only trying to charge the truck with your solar?

A number of articles suggest this is the most cost effective way to charge your vehicle but I disagree. If you are on a TOU (time of use) rate structure, you want to sell as much solar power as possible to the utility at the highest rates. and charge your truck at the lowest rates. You want to limit your kWh consumption during the peak rate times so it makes sense to not charge the vehicle at those times.

With my utility (NorCal PG&E) that means 3 PM to Midnight on EV rates. Outside of that time period, it doesn't matter when you charge since you are on the lowest rates. You might as well charge starting at midnight to be sure you get whatever charge you need and the truck is available at any time during the day. It also simplifies programing the charger since it starts at the same time every day and you don't need Tesla's bi-directional charger.

As you point out, you can use a Powerwall, although I am not clear when the Powerwalls will be able to charge the vehicle. It seems to involve an upcoming OTA: https://www.tesla.com/support/powershare

The next consideration is whether you want to sell some of the truck's battery power to the utility and "make money" or use the battery for home backup. From my reading, it appears you need the Powershare to do that. However, with the Powerwall, you would not need the universal wall connector or backup switch.

Personally, I want to sell battery power to the utility to help pay for the truck (not so much as to deteriorate the battery excessively).

If someone has more info on this, please chime in.
[/QUOTE]

 

[akenis]

Charge vehicle using solar is definitely possible with a Powerwall.

For Duke in FL, I think TOU works different. I think net metering is applied to each time period. So power sent to the grid during peak offsets power used during peak.

I also would rather my $2500 go toward a Powerwall. The V3 gateway is overkill with the transformer and $800 more than Gateway 3. It’s also not super compatible with Powerwall 3…. Site controller has to be disabled and requires commissioning support from Tesla. Only downside is waiting for software updates to enable POWERSHARE function for Powerwall plus any charger.

Truck does not support V2G or even VTH. It can only supply power if you are off the grid.

 

[flyinglow]

Truck does not support V2G or even VTH. It can only supply power if you are off the grid.

Enphase will eventually have a system that does bi-directional charging, V2H/G, solar and even ICE generator inputs. It is in development and certification but should be available by 2025.

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