The article is light on those facts. I don't think lead acid can hit these numbers though. I'd guess 1500 cycles at 80% DOD optimistically. So you'd need to replace it 4-5 times over 20 years. Even at $100/KWH battery cost for lead acid, it blows up to $400-500 over 20 years. That's 7+ cents cost.
Maybe pumped hydro or something more like that? On Mon, Jun 5, 2017 at 11:53 AM Mathew Howard <mhoward...@gmail.com> wrote: > Yeah, but why would they be using that kind of batteries? It seems to me > that something like the salt water batteries, or even some variant of lead > acid would be a lot more practical for this kind of thing... assuming > they're using batteries at all. > > On Mon, Jun 5, 2017 at 10:34 AM, Rory Conaway <r...@triadwireless.net> > wrote: > >> I thought the $230 was just the manufacturing cost, not including the >> capital costs. For example, the 60KWH battery in the Bolt costs between >> $13000 and $13900 depending on the article. >> >> The real problem with most of the batteries is that you have to know what >> percentage of charge is part of the equation. For example, the Leaf >> original battery was probably something like 800 charges with 80% of the >> battery storage still there. Tesla is advertising much longer life and >> supposedly has 95% of the battery life after 8 years and something like >> 2000 charges. But the reality is we don’t know how many extra cells are in >> a Tesla battery pack to maintain that illusion. If they added 5% more >> cells than the rated charge, maybe they just bring them into the folod to >> make it look like the battery isn’t getting older (I kind of suspected that >> and GM confirmed they are doing the same thing also with the Bolt). The >> catch with all these numbers is how much of the battery gets charged to >> maximum life and how partial charges factor in. >> >> With our Leaf, we always charged to 100% and lost 2 of the 12 cells >> within 45,000 miles. Tesla recommends only 80% charges since full charges >> seem to shorten battery life. GM was keeping the Volt battery between 30% >> and 80% to maximum life. >> >> >> >> *From:* Af [mailto:af-boun...@afmug.com] *On Behalf Of *Harold Bledsoe >> *Sent:* Monday, June 5, 2017 7:43 AM >> *To:* af@afmug.com >> *Subject:* Re: [AFMUG] This Is the Biggest News in Electricity Since the >> LightBulb -- Seriously >> >> >> >> I don't think this is the right comparison unit. $230 is the capital, >> up-front cost per KWH for the car. 4.5 cents would be some kind of 20 year >> operational usage cost. It still seems hard to make money at that price >> though. How many cycles can you get from a Li car battery? >> >> >> >> On Mon, Jun 5, 2017 at 2:11 AM Rory Conaway <r...@triadwireless.net> >> wrote: >> >> Considering that battery costs right now are at $230 per KWH for electric >> cars, I’m kind of not buying that. >> >> >> >> *From:* Af [mailto:af-boun...@afmug.com] *On Behalf Of *Bill Prince >> *Sent:* Sunday, June 4, 2017 11:08 PM >> *To:* af@afmug.com >> *Subject:* Re: [AFMUG] This Is the Biggest News in Electricity Since the >> LightBulb -- Seriously >> >> >> >> The monumental breakthrough is the cost per KWH. They're saying 4.5 cents >> per KWH. That is a big deal. >> >> bp >> >> <part15sbs{at}gmail{dot}com> >> >> >> >> On 6/4/2017 1:25 PM, Jeremy wrote: >> >> Apparently 'solar-plus' is just the process of storing energy in large >> banks of batteries and then using it during peak hours when energy costs >> more. I am not finding the monumental breakthrough here.... >> >> >> >> On Jun 4, 2017 10:11 AM, "Bill Prince" <part15...@gmail.com> wrote: >> >> I heard about these giant rubber bands... >> >> >> >> bp >> >> <part15sbs{at}gmail{dot}com> >> >> >> >> On 6/3/2017 7:00 PM, Chuck McCown wrote: >> >> It doesn’t say how they are storing the energy. >> >> >> >> *From:* Jaime Solorza >> >> *Sent:* Saturday, June 03, 2017 3:20 PM >> >> *To:* Animal Farm >> >> *Subject:* [AFMUG] This Is the Biggest News in Electricity Since the >> LightBulb -- Seriously >> >> >> >> >> https://news.google.com/news/amp?caurl=https%3A%2F%2Fwww.fool.com%2Finvesting%2F2017%2F06%2F03%2Fthis-is-the-biggest-news-in-electricity-since-the.aspx#pt0-845273 >> >> >> >> >> >> >
