Recent content by daniel Ox9EFD

Did anyone yet take delivery or have a delivery date on the powerwall/powerpack? Thanks, Daniel

Home quick charging... Interesting idea.

Oops. Yes. 1100 Wh/l. I was thinking about kWh/kg while typing. Here might be the catch - they did not publish kWh/kg. This might be quite relevant since you could expect an all solid state battery to be heavier than current ones. It might still be a leap in technology, but we don't know. I...

Yea well I was telling that to myself mostly. I had some wishful thinking regarding Sakti3. After seeing an interview with the CEO, it got me impressed. But leaving out an important detail like kWh/kg seems questionable.

I take back the Sakti3 comment. I couldn't find any information on energy density by weight. I thought I was just missing something but it seems they intentionally did not publish it.

Taking the Tesla or Nissan batteries energy density by volume and comparing tells you very little about the specific energy... this thing doesn't have an liquid electrolyte. If anything it should be heavier. This seems relevant if you want to put it in a car, you might care about weight as much...

It depends what you want to do with it. The powerpack, from my understanding uses the NCA chemistry. That's the lower cycle life chemistry (around 3000 cycles in normal conditions from what I know). So if this is about daily cycling, as in, going off grid, you might be better off with stacking 7...

You can't just take X% improvement per year in batteries and assume that trend just continues. You need to look at actual battery chemistries coming up. There are a few companies doing solid-state Lithium batteries: Sakti3, Quantumscape. From an interview of Ann Marie Sastry, CEO of Sakti3, she...

Ok, Could there be a simple way to adjust the price to better compare to Tesla's $250/kWh, 90-something% efficiency? 250/.92 = 270, 160/.75 = 213. I'd guess it's more complicated than that, but is there some simple way to show an 'effective' price? - - - Updated - - -...

Eos Energy Storage | Technology and Products They claim $160/kWh, 10k cycles (30 years). Zinc Air batteries (don't metal air Li-Ion fall apart?). They seem ready for market quite soon. I'm looking for a catch.

anyone knows what energy density (Wh/kg) will they get? They say 1100 Wh/l, but I don't know what goes into the battery. Couldn't find it anywhere.

Regarding GS Yuasa, that supplies Mistsubishi, I made a rather banal simplification in the calculations: I took the currently produced supply data and used that as an approximation for their entire capacity, which like in the case of LG Chem could be much much bigger (LG is at 1/6 of their...

I keep finding errors in the calculations, but it anyone has something to contribute, please go ahead. Tomorrow I'll have more time to get this right.

By when will Tesla have 100000 run rate? 2016? So that 87000 is probably false. And it is clear that not having any information about the production rate at the gigafactory in 2016 makes this estimate a hand-waving exercise. For BYD, AESC, Samsung in 2015 I took producted MWh as an approximation...

OK, Following a conversation with techmaven (and giving the issue some thought), it makes much more sense to predict 2017 capacity than 2020, since there is a lot going on in new battery technology and if it takes 2 years to build new capacity, that fits quite well into the 2020 timeframe. I...