Grid scale batteries are different in that they can use different chemistry (volume is not as important), better cooling and less aggressive charge/discharge cycles to increase lifetime.
I was under the impression that Tessa's product they sold to Australia was essentially a bunch of tesla vehicle batteries which are lithium ion which is the same as laptops and phones. Is there some distinction?
I have seen and old grid scale battery at fort Bragg. It was lead acid and the size of a city block and could power the whole base for three days, but it was for backup not regular cycles. I thought new grid scale batteries were different from this one.
Less agressive charge/discharge cycles means overprovisioning which means more cost.if you Want the battery to power the island overnight in 5 years then you have to get a battery that is 5x the MWH that you need. Which is a fine technical solution but makes the economics worse.
I'm no expert in the topic, but "lithium ion" is a broad category of different chemistries with different characteristics. Cooling also plays a very important role. Tesla's powerwall for example has a warranty of 5000 cycles whereas my Macbook's battery is only good for 1000 cycles and my previous Macbook's battery was only good for 300 cycles.
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