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u3b3rg33k · 09-10-19, 10:25 AM

"edison batteries" are Nickel-Iron.

my understanding is that they're extremely durable, but low energy density and high self discharge. to get a battery bank big enough to be useful (start up motors), you'd need to dump in a lot of money. you can see by the size of their battery. 50kw/400kwh is the size of a shipping container. the same kwh in Li-ion would be the size of a small car, maybe smaller.

I used to be more excited about them, but used EV traction batteries is where the numbers line up for me.

the video makes this sound more like a flow version of Aquion's saltwater battery.

i also find their comments about how li-ion only lasts a few hours disingenuous. that's 100% related to discharge rate vs capacity, NOT chemistry. 400kWh / 4h = 100kWh/h no matter what flavor it is. also not sold on the capacity fade argument just yet.

long term the judgement will be economics, i think. electric cars have turned up the needle on economies of scale.

09-10-19, 10:25 AM	#5
u3b3rg33k Apprentice EcoRenovator Join Date: Mar 2018 Location: Rustbelt, USA Posts: 114 Thanks: 5 Thanked 10 Times in 9 Posts	"edison batteries" are Nickel-Iron. my understanding is that they're extremely durable, but low energy density and high self discharge. to get a battery bank big enough to be useful (start up motors), you'd need to dump in a lot of money. you can see by the size of their battery. 50kw/400kwh is the size of a shipping container. the same kwh in Li-ion would be the size of a small car, maybe smaller. I used to be more excited about them, but used EV traction batteries is where the numbers line up for me. the video makes this sound more like a flow version of Aquion's saltwater battery. i also find their comments about how li-ion only lasts a few hours disingenuous. that's 100% related to discharge rate vs capacity, NOT chemistry. 400kWh / 4h = 100kWh/h no matter what flavor it is. also not sold on the capacity fade argument just yet. long term the judgement will be economics, i think. electric cars have turned up the needle on economies of scale.