I did this for the Tesla Powerwall versus other top options in 2015 when the Powerwall came out - check that out if you want to dive more deeply into what such calculations entail. To figure out the latter, you need to calculate number of cycles and lifetime of the system (and, actually, even more than that, like efficiency, maintenance, and repair). The $/kWh cost of electric vehicle batteries is not at all the same as the $/kWh cost of stationary battery storage systems.Īdditionally, there are actually two different types of $/kWh - there’s the price of the storage system based on one-time energy storage capacity and upfront cost (for example, if your battery has 100 kWh of energy storage capacity and costs $5,000, the figure is $50/kW), and there’s actual cost per kWh of electricity stored over the lifetime of a storage system. I’ve gotten some extra details from Elon regarding Tesla energy storage pricing, including information that I don’t think was previously public, and I’ve reached out to StorEn Technologies for more details on their assumptions.įirst of all, though, there are at least a few things to point out here to clear up some massive confusion and misunderstanding. We just pulled down an article about vanadium flow batteries versus lithium-ion batteries for long-duration energy storage because Tesla CEO Elon Musk responded, “This article is wildly incorrect about lithium battery costs by a factor of 5 or more presently & 10X long-term.” However, that raised more questions than answers for me, so I have dug in further and have some new information to share along with a lot more context regarding battery prices and long-term costs.
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