Was not linear. A full 50% of that battery improvement was in the last year. And the 20-to-1 improvement turned a 1900's 20 mile car into a very practical 400 mile car Bob
On Sat, May 8, 2021 at 7:47 PM Lee Hart via EV <ev@lists.evdl.org> wrote: > > 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 _______________________________________________ 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
