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That LFP price can't be right. That's $1000/kWh! Batteries have been cheaper than that for at least half a decade. And I'm pretty sure Na-ion (at room temperatu
by scythe 4y ago
That LFP price can't be right. That's $1000/kWh! Batteries have been cheaper than that for at least half a decade. And I'm pretty sure Na-ion (at room temperature) hasn't even hit the market yet! Googling "sodium-ion battery price" just gave me textbooks.
- adrian_b 4y agoI believe that there might be cheaper LFP, that is why I have written "after a short googling". $1000 per kWh was the first price that I have found for a 5 kWh LFP battery and I am lazy now to search for a cheaper one, so this is a real price, even if it is likely not the best price. For a much larger battery, a quick search shows EUR 20000 for 50 kWh, i.e. EUR 400/kWh (though this price is older and now it might have increased). It is normal for the price per kWh to decrease at very large capacities. Also, the fact that LFP were cheaper than this a decade ago is irrelevant, because googling about their price finds that "lithium prices have surged over 700% since the start of 2021, which has led to a big jump in battery pack prices" (written in May 2022). However, Na-ion batteries for solar energy storage have certainly already hit the market, e.g.: https://www.alibaba.com/product-detail/SUNPOK-48V-5kwh-Sodium-ion-battery_1600550915863.html https://www.alibaba.com/product-detail/SUNPOK-48V-5kwh-Sodiu... EDIT: After an extra search, I have seen an offer for a LFP 5 kWh battery @ $2000, so it looks like the $400/kWh price is available for lower capacities too. Nevertheless, this price is less reliable than the higher prices seen initially, because it is only for some kind of pre-order with unknown delivery time.
- guerby 4y ago5 kWh LFP battery with BMS and user serviçable rack format from a reputable brand in the USA is $1,649.99 so $330/kWh, see here for example: https://www.currentconnected.com/product/sk48v100/ https://www.currentconnected.com/product/sk48v100/ You can easily find other brands for less than $300/kWh, and plenty of review/teardowns on youtube. Edit: adding "Typical capacity at 80% DOD @.5C Rate is over 7000 Cycles" so if you bring your battery to 7000 80% cycles at 0.5C you got 28000 kWh out of it, so 0.059 USD/kWh out of the battery (and you still have 4 kWh usable in the battery so many more cycles).
- adrian_b 4y agoYes, that is a good price, but AFAIK all the US prices are quoted without taxes, to make them seem smaller, unlike in most other countries, so with taxes included I assume that the real price is about $400/kWh, which matches the price that I have found meanwhile for a similar battery in UK. Therefore, the current price for Na-ion batteries is only 3 times less than LFP (the endurance and lifetime are claimed to be about the same for Na-ion and LFP). Still, this price ratio of 3 remains a significant difference and it is very likely that in the future the price of Na-ion will decrease at a much higher rate than the cost of the mature lithium-based batteries, when more manufacturers will begin to make Na-ion batteries.
- _ea1k 4y agoTaxes in the US are not hidden, so usually they aren't as high as in the UK. They are seldom higher than 10%, so still well under $400/kwh.