Robert Bruninga via EV wrote:
For what it is worth, I researched the improvements in battery capacity since the Edison Nickel-iron EV battery in the 1900's. Looks like it went from 20 Whr/kg to 400 Whr/kg on the latest Tesla cells. A 20-to-1 improvement.
Ah, but a 20-to-1 improvement over 100 years is only about a 3% improvement per year (i.e. $1 invested in 1920 at 3% compound interest is $19.20 today).
For solar, I use the factor of about 200-to-one since 1970.
So solar is a heck of a lot better investment. :-) Lee -- A designer knows he has achieved perfection not when there is nothing left to add, but when there is nothing left to take away. -- Antoine de Saint Exupery -- Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus _______________________________________________ Address messages to ev@lists.evdl.org No other addresses in TO and CC fields UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/ LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org