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.
They’re brand new and the writer needs a number to look impressive.
but that catched my attention for EVs.
And last decades
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.
What size? That sounds like a little 2000mah power bank.
That’s the thing, it wasn’t. It’s an Ecoflow Delta Power Station, We tested boiling 1.5 liters of water off it and it used 15% of the capacity. Meanwhile, charging the phone overnight drained 30%.
That doesn’t seem normal. Did you like use the phone all night otherwise it should charge up quickly and then not use any noticeable energy.
You would think, but we went directly to bed with as many blankets and coats as we could find. Just plug it in and let it charge. The phone has a maximum power draw of maybe 20W when speed charging. Not exactly boiling water.
I need to do some more formal testing, but I’ve found the discharge rate of my ecoflow to be baffling compared to my Jackery or a big Bluetti I have. My experience has been similar to yours.
Which has surprised me because in general I’ve only heard good things about them.
Did you find it was connected to temperature or other drop offs in capacity?
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.
It has outputs through USB-A, USB-C, AC, and DC-vehicle (whatever it’s called). I think the AC inverter was off, though I had been using it earlier. I was definitely charging fully through the USB-C output. Good point, though.
They’re meant to have a much wider temperature range than Li-ion, theoretically.
Wonder if there’s a trade off with the faster charging, or if it’s just a side effect of the grid power setup.
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?
Lithium is used in grid storage:
And that’s just what I could find in a couple of minutes.
I have read encouraging numbers about charge cycles for sodium batteries, I’m quite curious too about real values.