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Powerwall 2 and Integrated Solar

powerwall.tesla.com

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Re: Powerwall 2 and Integrated Solar

#231

Post by celticninja »

mrfusion wrote: post #220
intrasight wrote: post #49

For $3000 this would be easy to justify just to keep my computer and network operating. I work at home and our power goes out too frequently. Is usually just for 10-20 seconds and my UPS takes care of that. But sometimes it is out for several hours - I'll say several times per year. If I can't work, I can't bill.

If you use a laptop a ups can power your router and modem for quite a long time. Or you can buy a huge ups for a lot less than 3000 and power a desktop machine too.

What's the running cost of a huge ups?

Re: Powerwall 2 and Integrated Solar

#232

Post by hanoz »

anthay wrote: post #168

I was pleasantly surprised to see prices quoted in £GBP - the Powerwall is available in the UK! But, we don't have enough sunlight here to run a typical house off-grid year-round, do we?

In the UK a lot of people are on tariffs which pay them above market rate for the electricity they generate regardless of whether they feed it into the grid or use it themselves. A battery like this will allow them to both sell and use 100% of what they generate.

Re: Powerwall 2 and Integrated Solar

#233

Post by quickben »

smokeyj wrote: post #113
iamcreasy wrote: post #111

Earlier quoted context omitted.

What is HOA?

Just google it. I'm getting tired of seeing so many low effort comments. I used to come here to be informed..

Just imagine if they wrote encyclopedias in your communication style. Completely fictional example:

From Ye Great Book of All Scottish things, 856 year of the Lord, page 17: - yepswatter : a very commonly used household object, just ask anybody around to show you one.

Re: Powerwall 2 and Integrated Solar

#234

Post by ghaff »

antisthenes wrote: post #184
Loic wrote: post #118

Quick question for the people living in the US (Target customers of the Powerwall). What is your yearly power usage? On the website[0] they put for sizing 10kWh/day/BR. Which means 14600kWh/year for a 4 bedroom house. Here in Germany, working from home with a 4BR+office house, we are using 2550kWh/year. So, I suppose the Tesla sizing is to support a "peak day" usage, but still, I am surprised by the calculations. Thi…

The reason their calculations are so high is because in the US, typical houses are made as cheaply as possible, pretty much with paper, plastic and vastly insufficient insulation. That may have changed in the recent years, but holds true for most residential properties built before 1980.

What a sweeping generalization.

Furthermore, unless you're in an area of the country that requires the use of a lot of AC--or you have electric baseboard heat--insulation doesn't even play that much into electricity usage.

Re: Powerwall 2 and Integrated Solar

#236

Post by ghaff »

Keyframe wrote: post #219
j1vms wrote: post #165

Earlier quoted context omitted.

> The big difference is because of air conditioning and baseboard heating (...) Which makes you wonder why there is not as much high-profile attention on A/C (and to a lesser extent electrical heating) as being a problem worthy of rethinking by Silicon Valley (perhaps even ahead of solar, in North America).

It might be (it is) anecdotal, but as someone from Europe it struck me odd how much Americans love their A/C. Too much, in fact. Almost everywhere I went it was too cold. Somewhat like in SE Asia. That might be the answer to high energy use.

For Americans, mostly read Texans or maybe Southerners more broadly. A lot of us joke that the hotter the climate in a US state, the colder they tend to crank the AC.

Re: Powerwall 2 and Integrated Solar

#237

Post by quickben »

Animats wrote: post #124
dangrossman wrote: post #115

Earlier quoted context omitted.

Right, so you won't be able to use an app to monitor your Powerwall while it's offline... the battery's still going to work. Backup and off-grid are advertised use cases. Tesla's cars have the "cloud-connected, remote-controlled" stuff too, but they don't stop in the middle of the road if you leave cell phone coverage.

The nominal product life is 5,000 charge/discharge cycles, or 13-14 years if solar powered. Maintenance monitoring, including battery deterioration, is remote, from Tesla's end. Will that service still be running in 2030?

There will have to be onsite maintenance for battery/invertor swaps long before any battery power product, let alone energy backup, reaches 5000 cycles of lifespan.

Re: Powerwall 2 and Integrated Solar

#238

Post by mcbits »

gregn610 wrote: post #182

X-post from reddit as it might get an answer here... http://m.imgur.com/pgskG9q?r This LNG ship got me wondering about a battery equivalent, charged up in a desert solar farm and shipped to a major city. I get 16 Powerpacks per 40ft container 5100 containers per Panamax ship =81600 powerpacks per ship At 95kWh per pack = 7752MWh per ship ( based on powerpack v1) So is that like two Hinckley C nuclear reactors worth o…

Another way to approach the question is to compare the energy density of LNG to Lithium-ion batteries: https://en.wikipedia.org/wiki/Energy_density

You'd need about 10-20x more shipments of the same volume or 50-100x more shipments of the same weight to transport the same quantity of energy.

Re: Powerwall 2 and Integrated Solar

#239

Post by Tyr42 »

whage wrote: post #134
Tinyyy wrote: post #109

https://www.tesla.com/solar For people like me who missed the solar roof.

Thanks! Can someone tell me what kind of architectural style does that house on the landing page represent?

Oh, and if you are interested, here's a chart of them all:

http://www.blogarama.com/home-garden-blogs/320928-inspired-h...

Or one big image:

http://mentalfloss.com/sites/default/files/p-americanhouses_...

I think it almost feels like the deconstructionist modern style (bottom right)

Re: Powerwall 2 and Integrated Solar

#240

Post by Keyframe »

ghaff wrote: post #236
Keyframe wrote: post #219

Earlier quoted context omitted.

It might be (it is) anecdotal, but as someone from Europe it struck me odd how much Americans love their A/C. Too much, in fact. Almost everywhere I went it was too cold. Somewhat like in SE Asia. That might be the answer to high energy use.

For Americans, mostly read Texans or maybe Southerners more broadly. A lot of us joke that the hotter the climate in a US state, the colder they tend to crank the AC.

That can't be good for health! SE Asia like to do that too. I joked that tropics there were a sham since I had to wear a jacket all the time because of the polar-like A/C.
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