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Comment by outside1234 | Hacker News Reader

This battery is for a car, not grid storage (or at least this is my read)

Looks like it’s designed to charge EV’s at 400kW. Perfect for racetracks which may need insane charging rates but aren’t full time charging stations. 5 super cars at 400kW each would normally take an insane grid connection, but you can trickle charge these with solar and or vastly smaller grid connections.

It isn’t just race cars, this approximate power level is widely available in consumer cars.

Hyundai Ioniq-5 and other vehicles can utilize the increasingly common 350 kW connectors — including the Lucid Air, the Porsche Taycan, the Audi E-Tron GT, and the GMC Hummer EV. [0]

This enables them to deploy the fastest DC charging in places where the grid cannot support it. It’s a big deal.

[0] https://www.greencarreports.com/news/1135771_hyundai-ioniq-5...

You can use the battery on top of the existing grid connection. So if you can charge the 790kWh battery pack on a 50kW grid connection you can charge at 400kW + 50kW = 450kW which seems overkill if you only need 350kW.

It might also be designed to support multiple EV’s as most cars can only stay at 350kW for a relatively short period.

I don't think this is for a car. There's a line in the article, "Details have been eagerly anticipated since the company announced it was going into stationary energy storage back in May".

>> the battery energy storage system (BESS) division of EV supercar company Rima <<

ESS == stationary Battery Energy Storage System. So this would be comparable to Tesal's Megapack business unit. I mean 790kW in an EV? That's must be for a rocket.

790kWh for a car? Now that should be sufficient range for everyone. But seriously, this isn't for cars.

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