We had electronics and power tools on li-ion power widely available for two decades now, yet UPS remain on lead acid in 2020? Why?
In: Technology
You can totally get UPS systems based on Li-Ion if you so choose, but the main reason most remain on lead-acid is because of cost–that many lead-acid batteries are cheaper than the equivalent Li-Ions, and the circuitry to handle charging them is considerably less complex as well. Given the main advantage of Li-Ion is they’re smaller and lighter for the same energy storage, and UPS devices tend to be static installations where you’re not too worried about the size and weight, there’s not a huge benefit from using them in this role.
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