Mack
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returnofthemack.bsky.social
Mack
@returnofthemack.bsky.social
engineer, founder, etc.

Into energy, materials science, decarb, deeptech, physics, sad sports teams, and bad jokes. Thoughts my own (I think).
Reposted by Mack
Another angle is that, as your battery fleet grows, incremental batteries are getting much lower utilization than the first ones, so they're a lot less economic to add (even when you have wind as well as solar to balance seasonality). Batteries cannibalize batteries quite fast.
June 23, 2025 at 10:35 AM
Does that include the data connectivity? I rented one on vacation once and found that the cameras got triggered constantly by snow and the video over air sucked a (relatively) significant amount of power over multiple nights
January 31, 2025 at 4:21 PM
Base Power co is doing this in Texas.

If anybody sees this and wants to talk about doing this at C&I scales, follow/ping/message me.
December 17, 2024 at 1:36 AM
Combine it with railway rights of way and we are cooking (with plasma)
December 17, 2024 at 1:33 AM
We outchea
December 3, 2024 at 6:39 PM
It is, but they’re competing against other battery techs that have significant incumbency advantages, and these are meant to be long lived assets, which that take a long time to satisfy financing party/operator risk tolerances, so every bit of speed matters.
December 3, 2024 at 5:59 PM
And that currently, nobody is incentivized to lead a standardization effort or share their designs, when in reality very few have anything differentiating. Tricky problem
December 3, 2024 at 3:37 PM
I’ve been speaking with experts for almost a year now in the space, and the lack of unified hardware standards/styles is a massive drain on the startups in the space. Everyone reinventing the wheel.
December 3, 2024 at 3:21 PM
*knock knock* hello it’s me, your friendly neighborhood defense prime, mind if I search your house please?
December 3, 2024 at 3:16 PM
How timely!
December 3, 2024 at 3:00 PM
Mass-Manufacturability of flow seems to be the largest disadvantage compared to traditional cells going forward
December 1, 2024 at 2:24 PM
Hydrogen is thought of in some of these as an electric proxy to some extent but agree, one of the last real set of tech r&d challenges
November 22, 2024 at 2:56 PM
Doable, just a trade off between other power control system costs. If you’re reliant on <$0.04 kWhs to make your economics work, every tenth of a cent matters
November 21, 2024 at 6:02 PM
Reposted by Mack
Tiny/moderate up downs are the issue. Rectifiers and transformers are among the most important components to an electrolyzer system (not the cell stack) and that’s where costs have ballooned, offsetting cell stack manufacturing gains.

Batteries are great, they just add multiple cents per kWh.
November 21, 2024 at 5:50 PM
Tiny/moderate up downs are the issue. Rectifiers and transformers are among the most important components to an electrolyzer system (not the cell stack) and that’s where costs have ballooned, offsetting cell stack manufacturing gains.

Batteries are great, they just add multiple cents per kWh.
November 21, 2024 at 5:50 PM
Ramping time has been among the major design challenges for electrolyzer producers to marry with variable production. That’s partially driving the move back to alkaline versus proton exchange, it’s more resilient to variable power
November 21, 2024 at 5:41 PM
🫡
November 21, 2024 at 5:29 AM
Banger.
November 21, 2024 at 4:35 AM
Reposted by Mack
That later category has way more business model risk, is going to be less willing to make long-term commitments, is probably asking for maximum power for the site without tenants to back it up, etc.
November 20, 2024 at 10:09 PM