Carbon super capacitors. Ya... As of today, one of the reasons capacitors of any kind are not used as a primary energy storage device is energy density and a linear voltage drop as the cap is exhausted. Batteries are desirable because they hold up to 80% of their voltage down to a 10% energy level. In short, as you exhaust a battery the output voltage stays fairly constant, until the end. This is desirable for inverters taking a "fixed" DC voltage converting to 60 cycle AC at a given voltage. The less the voltage input variability, the better.
Another reason is the bleed rate of power in relation to time. Caps are hemophiliacs bleeding electrons all over the place, quickly, in comparison to batteries. But, what caps are great at is providing huge amounts of power in a very short time. Bursts of energy. The few seconds needed for a floored EV to hit 60 ASAP. Charge them up, hit the load, then wait until needed again.
And finally, the useful voltage needed to power the "real world" is not 1 or two volts DC to light an LED. In fact high voltage storage is desirable because it allows current to be lower for equal power, reducing heat through a given size conductor. In fact the battery storage units for grid down "moments" used to be 48VDC as the high voltage bank for the lead acid world. Now with Li tech, battery storage is in the hundreds of volts, very similar to EV battery packs. Everything on the connection end can be smaller.
SO practically speaking, having a 500VDC foundation may not be a good choice. Often times possible systems like this can scale in a commercial or industrial application, but not for res type applications. Kind of like H2. It maybe has potential for ships and trains, but cars and trucks it pretty much falls flat on its face if you look at real cradle to grave efficiencies, against BEV.
But on the bright side, you could give your party guests a real charge, just upon entering your house, before they even hit the refreshments... You could dub them as, "Electron Parties". Who knows where that might go. No pacemakers allowed though...
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william fitch
Owner
www.WeAreSolar.com
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Original Message:
Sent: 10-13-2023 09:17 AM
From: Mark Chalom
Subject: Solar Today Article: Six Solutions to Battery Mineral Challenges
Original Message:
Sent: 10/12/2023 6:29:00 PM
From: william fitch
Subject: RE: Solar Today Article: Six Solutions to Battery Mineral Challenges
As a related in time article occurrence, out on Cleantechnica, there is an article entitled:
"https://cleantechnica.com/2023/10/12/rural-solar-opponents-about-to-face-tsunami-of-pv/"
The linking issue here is the FUD and lies being put forth extra heavy by the FFI and electric utilities
that want the free RE just for themselves.
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william fitch
Owner
www.WeAreSolar.com
Original Message:
Sent: 10-11-2023 12:11 PM
From: Kat Friedrich
Subject: Solar Today Article: Six Solutions to Battery Mineral Challenges
"A flood of recent articles, whether spontaneous or coordinated, seeks to discredit renewable energy, electric vehicles (EVs), and other elements of the climate-saving energy transition. Critiques range from grid reliability to land use, from economy to equity.
Among the most widespread and conflictual claims is that it's immensely destructive, if not impossible, to find enough minerals to make all the batteries that a global fleet of EVs will need.
These mineral concerns are indeed not trivial, but are often exaggerated. I'll outline here how they can become manageable if we include solutions often overlooked."
Read this article by Amory B. Lovins, co-founder and chairman emeritus of RMI and an adjunct professor of civil and environmental engineering at Stanford University...
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Kat Friedrich
Editor in Chief
American Solar Energy Society
Monona WI
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