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Powerwall 2 and Integrated Solar

powerwall.tesla.com

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Re: Powerwall 2 and Integrated Solar

#31

Post by givinguflac »

hyperbovine wrote: post #15
amluto wrote: post #12

I have no particular desire to sign up just to watch the video, but I hope that the Powerwall 2 is compelling enough to beat out the LG Chem RESU. For reference, the RESU is a wall-mounted Li-ion battery meant to be connected to a solar inverter. It seems to beat the Powerwall in basically every respect. It's a bit cheaper, it has a better warranty, and it has slightly lower advertised capacity but higher warranted c…

People are willing to pay a premium for nice looking stuff that works well together. cf. Apple.

Where is the premium here?

Re: Powerwall 2 and Integrated Solar

#32

Post by BrittTheIsh »

mateus1 wrote: post #28
annerajb wrote: post #22

Earlier quoted context omitted.

Tesla version integrates the inverter and has double the capacity(14kwh) for the same cost as LG Chem REsu 9kwh version One 14 kWh Powerwall battery $5,500 Installation and supporting hardware starts at $1,000

14/9 is not double.

The powerwall went from 7 to 14. Double.

Re: Powerwall 2 and Integrated Solar

#33

Post by donclark »

Are the solar cells and powerwall shielded by any kind of solar storm? I couldnt find any detailed information confirming or denying it. I would not like for any of us to be in a situation where the 1st solar outtage is our most damaging, and thats what causes any producer of electronics to adopt labeling and marketing for it.

Re: Powerwall 2 and Integrated Solar

#34

Post by amluto »

annerajb wrote: post #22
amluto wrote: post #12

I have no particular desire to sign up just to watch the video, but I hope that the Powerwall 2 is compelling enough to beat out the LG Chem RESU. For reference, the RESU is a wall-mounted Li-ion battery meant to be connected to a solar inverter. It seems to beat the Powerwall in basically every respect. It's a bit cheaper, it has a better warranty, and it has slightly lower advertised capacity but higher warranted c…

Tesla version integrates the inverter and has double the capacity(14kwh) for the same cost as LG Chem REsu 9kwh version One 14 kWh Powerwall battery $5,500 Installation and supporting hardware starts at $1,000

Is it a string inverter? Is it compatible with DC optimizers? Can it provide backup power in the event of a grid failure?

Re: Powerwall 2 and Integrated Solar

#38

Post by hliyan »

donclark wrote: post #33

Are the solar cells and powerwall shielded by any kind of solar storm? I couldnt find any detailed information confirming or denying it. I would not like for any of us to be in a situation where the 1st solar outtage is our most damaging, and thats what causes any producer of electronics to adopt labeling and marketing for it.

Radiation spikes caused by solar storms

1. Are not in the visible spectrum

2. Do not reach the earth surface in appreciable amounts

Re: Powerwall 2 and Integrated Solar

#39

Post by OrwellianChild »

amluto wrote: post #12

I have no particular desire to sign up just to watch the video, but I hope that the Powerwall 2 is compelling enough to beat out the LG Chem RESU. For reference, the RESU is a wall-mounted Li-ion battery meant to be connected to a solar inverter. It seems to beat the Powerwall in basically every respect. It's a bit cheaper, it has a better warranty, and it has slightly lower advertised capacity but higher warranted c…

Video is available directly at the Solar City website: http://www.solarcity.com/

You need to skip ahead to the 46 min. mark to get started.

Re: Powerwall 2 and Integrated Solar

#40

Post by ChuckMcM »

alando46 wrote: post #20

Any idea how much power these things put out when compared with a conventional solar setup? 1:1? .5:1?

That was my question as well, this from the Techcrunch article:

"The current versions of the tiles actually have a two percent loss on efficiency, so 98 percent of what you’d normally get from a traditional solar panel, according to Elon Musk. But the company is working with 3M on improved coatings that have the potential to possibly go above normal efficiency, since it could trap the light within, leading to it bouncing around and resulting in less energy loss overall before it’s fully diffused."

Which suggests that on a square footage basis it is similar. The difference being that on a manufactured panel the cells are all exactly next to each other with no seams, and with the Tesla roof they appear to have a moat around them that varies a bit with roof tile style.

That said, assuming you cover your entire roof which will include both "ideal" south facing (or north facing in the southern hemisphere) and "non-ideal" north facing parts of the roof you may get enough additional generation from the extra tiles to push it over a more 'traditional' solar install.To be honest I'm thinking about replacing my perfectly fine (if nearly 15 year old) solar panel set up with those roof tiles. That and a couple of power walls and I just might be able to go 'gas only' with PG&E.

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