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Musk: "Version two of the Powerwall probably around July, August this year"
- Thread starter hockeythug
- Start date
PaulRocket
Member
Congratulations! Hoping for a lot more posts like these... May I ask how much you paid?
bryand
Member
The Powerwall itself was £4500, but it was fitted to a new SolarEdge-controlled PV system so there were some SolarEdge components installed which I wouldn't have needed if I had not had the Powerwall. In other words, I could have got the same PV performance for less, using non-SolarEdge components.
int32_t
Tesla Spotter
It would be great if you could post some statistics of your power-usage/how efficient the powerwall is. As someone who pays a brick-ton for power from the grid and get paid almost nothing to sell it this looks very interesting.
I would love more info about how much you "sell back" vs store and use.
I would love more info about how much you "sell back" vs store and use.
zag2me
Member
Ulmo
Active Member
I have heard from at least two of the four solar panel installers I'm working with that they will be offering PowerWalls in December of this year (2016). I think I will be attempting to make space in the installation for them when they become available.
int32_t
Tesla Spotter
An integrated inverter would be a sufficient upgrade all by itself. Anything further is icing on the cake!
It'll be more - one of his tweets said something about a new charger as well. Assuming he didn't mistype, that opens up the possibility of a Tesla DC car charger. ie. it hooks into the 400V DC bus between the solar panels and the battery and inverter, and draws DC before it hits the inverter, and charges the car via DC (just like a Supercharger would). In theory, if you had a big solar array, you could charge your car faster than an 80 amp, or 20 kW HPWC.
The required DC/DC converter between the stationary battery and car battery still has to have a certain power rating. I am not expecting them to exceed 20kW. Also, the rate when solar is not contributing would most likely be lower in order to avoid unreasonable C-rate discharge on the stationary battery.
True if the inverter itself allowed higher than 20kW, which is doubtful. And it should be mid day and your 20kW or larger solar array is working near 100%. Better off with grid supported dual chargers and HPWC. Sure, a nice 8kW DC charger, not supercharger, could be done with non inverted DC power. But hard to find a consumer class DC inverter that would support higher power than the dual charger HPWC that currently costs less than $6500. How fast does a Tesl owner need to charge at home?
Bonaire, I agree, not something too practical for most homeowners.
BUT, if you DID have a big solar array, it sure would be cool to have a home Supercharger. For practicality, I could see fleets and other commercial operators using this more than homes.
BTW, you DO NOT need a powerful inverter for this since you are taking solar panel DC and giving it to the car as DC. No inverter needed. Now you do have to match voltage, but the PowerWalls already do this for their internal batteries, so the extra parts count to allow the PowerWalls to modulate voltage for the Tesla car battery is minimal.
BUT, if you DID have a big solar array, it sure would be cool to have a home Supercharger. For practicality, I could see fleets and other commercial operators using this more than homes.
BTW, you DO NOT need a powerful inverter for this since you are taking solar panel DC and giving it to the car as DC. No inverter needed. Now you do have to match voltage, but the PowerWalls already do this for their internal batteries, so the extra parts count to allow the PowerWalls to modulate voltage for the Tesla car battery is minimal.
I would love someday to have home DC charging direct from my panels to my car. I would be willing to add more panels to my 9.8kWh system to do that.
DC charging would be a relatively small percentage of overall solar operation, so the inverter(s) would need to be sized for the total solar installation even if they aren't involved in the DC EV charging system.
Ok, I think I know what you guys are saying now. If you had a 50 kW solar array, it would be split into five (or more) 10kW DC strings for connections into five inverters. Given Elon's stated aim of integrating everything, Powerwall V2 would likely have an integrated inverter.
However this still doesn't preclude a separate charger, or EVSE, that would connect to a special DC output of each Powerwall, aggregating up to 50 kW (or more) of solar power directly into the car.
However this still doesn't preclude a separate charger, or EVSE, that would connect to a special DC output of each Powerwall, aggregating up to 50 kW (or more) of solar power directly into the car.
COrental
Member
How about a power wall with a built in inverter and transfer switch, to take advantage of time of use metering. Plug and play into my NEMA 14-50 outlet used to charge the model S. I guess to be used as backup power for the whole house it would need the transfer switching inatallled on the other
Side of the breaker box, but still a pretty simple wiring job for an electrician. I had my NEMA. 14-50 installed in my garage including an RV style outlet box for $210 total.
Side of the breaker box, but still a pretty simple wiring job for an electrician. I had my NEMA. 14-50 installed in my garage including an RV style outlet box for $210 total.
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