Observers sometimes call $100 per kWh the ”holy grail” of electrical vehicle production. This is due to the fact that crossing it allows electric vehicles to reach price parity with ICE vehicles. Moreover, the substantial cost savings of electric vehicles could actually make EVs cheaper than ICEs at $100 per kWh.

https://tslatimes.com/tesla-roadrunner-project-teslas-secret-battery-plan/

"Tesla has been on the path towards $100 per kWh for a long time. Back in 2018, Tesla’s Chief Technical Officer at the time, J.B. Straubel, said that Tesla was close to reaching $100 per kWh at the cell level. Moreover, he said he thought Tesla could also reach $100 per kWh at the pack level in roughly two years. This could allow for Tesla’s upcoming projects – the Tesla Semi, Tesla Roadster, and most notably the Tesla Cybertruck.

News about the Tesla Roadrunner project make it seem $100 at the pack level may now finally become a reality. Furthermore, this is something that Tesla has seemingly been planning for a long time. The Fremont firm’s acquisition of Maxwell, a super capacitor manufacturer, in 2019 was one important piece of the puzzle. "