Correct me if I am wrong, it estimates 12,000$ for a single day of energy backup of your home? For 12,000$ I dont mind staying one day without electricity.
Powerwall 2 and Integrated Solar
41–50 of 341 posts
Re: Powerwall 2 and Integrated Solar
#42Any idea how much power these things put out when compared with a conventional solar setup? 1:1? .5:1?
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Re: Powerwall 2 and Integrated Solar
#43Solar panel roofing tiles have been around for a long time. I wonder what this will do different? Pricing? Or perhaps they are relying on brand strength alone. Edit: I understand the urge to downvote because I'm not singing praise, but I promise I'm not trying to be overly pessimistic or critical of what Tesla is doing. Fact of the matter is, solar tiles have been done before, and failed miserably.
CIGS solar roofing tiles are (or were, not sure you can still get them) about 6% efficient. These are, according to what was in the TechCrunch article are over 20% efficient[1].
[1] I got there by taking the '98% as efficient as regular solar' from https://techcrunch.com/2016/10/28/these-are-teslas-stunning-... and the current 22% number advertised by Sunpower here : https://www.greentechmedia.com/articles/read/SunPower-Breaks...
Re: Powerwall 2 and Integrated Solar
#44Correct me if I am wrong, it estimates 12,000$ for a single day of energy backup of your home? For 12,000$ I dont mind staying one day without electricity.
You are wrong.
You can have multiple days. But normally you would use this to arbitrage electricity prices, especially if you don't have net metering.
Re: Powerwall 2 and Integrated Solar
#45I thought Straubel said that the Powerwall was meant not for offpeak storage but for emergency backup.
Re: Powerwall 2 and Integrated Solar
#46Correct me if I am wrong, it estimates 12,000$ for a single day of energy backup of your home? For 12,000$ I dont mind staying one day without electricity.
If you generate more electricity than you use during the day, you all of a sudden don't have an electric bill... or a drastically reduced one.
The funny thing about solar... it's not constant. Half the day is night... then clouds/rain/etc. 24/hours of electricity is for those dry periods.
Re: Powerwall 2 and Integrated Solar
#47Any 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 boun…
Normal shingles have a lot of overlap right. Wouldn't most of that moat be the overlap?
Re: Powerwall 2 and Integrated Solar
#48Solar panel roofing tiles have been around for a long time. I wonder what this will do different? Pricing? Or perhaps they are relying on brand strength alone. Edit: I understand the urge to downvote because I'm not singing praise, but I promise I'm not trying to be overly pessimistic or critical of what Tesla is doing. Fact of the matter is, solar tiles have been done before, and failed miserably.
CIGS solar roofing tiles are (or were, not sure you can still get them) about 6% efficient. These are, according to what was in the TechCrunch article are over 20% efficient[1]. [1] I got there by taking the '98% as efficient as regular solar' from https://techcrunch.com/2016/10/28/these-are-teslas-stunning-... and the current 22% number advertised by Sunpower here : https://www.greentechmedia.com/articles/read/SunPo…
DOW's CIGS was pretty garbage compared to Certainteed's Apollo II system, which achieved 13.2% efficiency. [1]
There are also up-and-coming competitors such as SunTegra that hit 14.6% [2].
It seems like asthetic options and possibly efficiency improvements is what will set this apart from previous stumblings in this space. We'll see how this looks in the real world!
[1]http://www.solarelectricsupply.com/apollo-ii-solar-roofing-s...
Re: Powerwall 2 and Integrated Solar
#49For $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.
Re: Powerwall 2 and Integrated Solar
#50Is anyone else having trouble with the tesla website? - bunch of words are in a different language and the prices are in a foreign currency.