Unfortunately, it looks like costs have stagnated in recent years: https://about.bnef.com/blog/lithium-ion-battery-pack-prices-rise-for-first-time-to-an-average

Unfortunately, it looks like costs have stagnated in recent years: https://about.bnef.com/blog/lithium-ion-battery-pack-prices-rise-for-first-time-to-an-average-of-151-kwh/ https://about.bnef.com/blog/lithium-ion-battery-pack-prices-...