Time until full charge isnt really a relevant metric for utility storage, you want larger storage, which would increase full charge time. Rate of charge is what matters.
210 Ah cells to 90% in 12 minutes.
Assuming I can math early on a Monday morning:
90% of 210 is 189
189 / 12 is 15.75
So they charge at 15.75 an Ah per minute. Not sure how that compares honestly.
The C rating is generally what battery charging (and discharging) is measured in. C being the capacity of the pack. So if the pack is 10 Ah and it takes 10 hours to charge it’s 1c, if it takes 1 hour to charge then it’s 10c.
I found this high current battery pack that’s rated for 30c. https://www.lipobattery.us/high-discharge-lithium-ion-battery-30c-2/
I don’t feel like doing the math for this battery pack.
The C rating is for discharging only.
The C rating can absolutely still be used when talking about recharging, it’s just usually less relevant.
No. The C rating is a cell’s maximum discharge rate without damaging the cell.
You absolutely can’t charge that 30C battery at 30A
Batteries have separate C ratings for charge and discharge.
I’m curious what the temperature resiliency is for sodium-ion batteries. I had a power outage recently where I was relying on a lithium-ion battery. As the temperature in the house plunged, it because so inefficient that charging a single phone overnight drained a quarter of the battery.
Source: https://batteryuniversity.com/article/bu-502-discharging-at-high-and-low-temperatures
I don’t have any data on sodium-ion.
It was slightly above freezing in the house, so definitely not operating at peak efficiency. From a brief search, it looks like sodium-ion does have a similar temperature sensitivity, though it may be to a different degree.
If I’m not mistaken, those portable power stations with AC inverters consume power even when not in use. You probably should use the DC output wherever possible.
How many decades do they last before needing replacement?
They’re meant to survive an order of magnitude more cycles than Li-ion. But I’m containing my enthusiasm until we see them lasting a long time in real life use.
Lithium isn’t used for grid batteries because weight doesn’t matter. Grid batteries with lead acid last 3 decades. Does this one last longer?
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Again, that doesn’t matter since the battery doesn’t move. This is a grid battery
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The question is then whether it’s cheaper to buy LiFePos instead of lead acid or to install more solar panels.
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