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Looking at specifications of these SOK batteries a little closer, one item that seems significantly different compared to common US brands is that recommended charge and discharge rates are lower.
The larger 206 Ah battery tested in video has a maximum continuous discharge current of 100 Amps, which could supply an inverter making approximately 1,000 Watts of power. That means that to power a typical microwave, it would take 2 of these larger batteries.
On charging side, the recommended rate is 40 Amps, with maximum of 50 Amps. That means that a fully discharged 200 Ah battery would take 5 hours to recharge (4 hours at max rate) which seems slow for lithium.
The smaller 100 Ah battery has 20A recommended, and 50A maximum, so recommended charge rate is up to 5 hours, but could be done in 2 hours. Either the type of cell, and/or the BMS, limits charge and discharge current to a lower level than I’d prefer. One of the lithium advantage is fast charging and high-power capability, and these fall a bit short in that area.
The larger 206 Ah battery is advertised at $1,029, making it only $400 per kW-hour. However, if it takes 2 batteries at a cost of over $2,000 in order to power a microwave, it may not be a great deal depending on needed energy requirement.
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