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Japan unveils first solar super-panel

japanenergyevent.com

11–20 of 43 posts

Re: Japan unveils first solar super-panel

#11
In my experience, no matter how many panels you install, Solar can cover power consumption 30-40% of its max capacity. Winter, night, bad weather will eat the rest. To go beyond the 30-40% you will need energy store or alternative sources.

This is still great but not a 100% solution.

Re: Japan unveils first solar super-panel

#12

In my experience, no matter how many panels you install, Solar can cover power consumption 30-40% of its max capacity. Winter, night, bad weather will eat the rest. To go beyond the 30-40% you will need energy store or alternative sources. This is still great but not a 100% solution.

Most people who care about independence should be concerned with having a system that can run in island mode but at least 90% of systems installed today are grid tied and cannot function as an island

Re: Japan unveils first solar super-panel

#13

In my experience, no matter how many panels you install, Solar can cover power consumption 30-40% of its max capacity. Winter, night, bad weather will eat the rest. To go beyond the 30-40% you will need energy store or alternative sources. This is still great but not a 100% solution.

At scale things look very different. A great deal of nighttime energy use occurs because electricity prices are cheaper at night. Panels to the east of you get sunlight earlier in the day and panels to the west of you get it later in the day. Tracking panels get sunlight across a larger fraction of the day.

Output from panels on a single home are highly correlated seeing large drop offs from an individual cloud, where solar farms across a wide geographic area experience different weather systems. It wouldn’t be cost effective but with absolutely zero storage the US could get 70+% of its electricity from solar. Add wind and hydro to the mix and you can get quite far without grid storage, but adding options lowers costs so there’s an optimal amount of grid storage for any given energy mix.

Re: Japan unveils first solar super-panel

#14
The article's title, in particular use of the word "first," isn't supported by the content. The title suggests a change or improvement in the technical status quo ante, but the article itself only describes a quantitative scaling up of existing technology, which is Perovskite panels, nothing new. No change is presented, only its scale of deployment.

Re: Japan unveils first solar super-panel

#15
There’s no unveiling right? This is just an announcement that they’ll build perovskite solar cells and sell them in 2030s.

> Supported by the government, Sekisui Chemical Co. is now developing advanced PSC modules for their future application to a broad market in the 2030s.

Re: Japan unveils first solar super-panel

#16

There’s no unveiling right? This is just an announcement that they’ll build perovskite solar cells and sell them in 2030s. > Supported by the government, Sekisui Chemical Co. is now developing advanced PSC modules for their future application to a broad market in the 2030s.

Additionally, if they currently target the 2030s, there absolutely no guarantee that they will ever sell them. The technology is in the research phase and as such may well turn out to be not a viable product.

Re: Japan unveils first solar super-panel

#18
Aspiration for 20 GW of power by 2040, or in 15 years time.

In the period 1980-1990, I repeat in a 50% shorter period commencing forty years ago, France installed 34 GW of nuclear.

All I want is for someone advocating renewables over nuclear to give me a single example of a buildout of available-in-winter power exceeding that target with the forty years of investment available.

Or to agree that we have, fundamentally and quite deliberately, become worse at generating carbon-free energy.

Re: Japan unveils first solar super-panel

#19

>Renewable energy in Japan will receive a *seismic shift* Maybe not the best analogy for the most earthquake-prone country in the world?

It would suck to build a massive solar panel array only for it to break after an earthquake. Hopefully they are seismic proofed like many buildings there.

Re: Japan unveils first solar super-panel

#20
Perovskite cells still don't make much sense for the majority of applications (and I suspect they never will): they're expensive, generally use toxic materials, and degrade much more quickly than silicon panels. Silicon panels are cheap, non-toxic, and long-lasting and plenty efficient enough for 90% of use cases.
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