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Nick Rutherford's avatar

Some thoughts:

America’s core electricity challenge is delivering reliable, on‑demand power at massive scale. The only realistic way to do that is with policy that directly rewards reliability and stops forcing unreliable resources onto the grid. Faster permitting for transmission and for dependable generation (especially gas and nuclear) would go a long way. My fear with solutions built around batteries, despite good intentions, is that they mostly function as a band‑aid rather than a cure.

It’s important to be clear: local storage does not replace a functional grid. Batteries don’t generate electricity. If a region is structurally short on reliable generation during high‑demand periods, then “charge when cheap” usually translates to “charge when someone else with real generation has a surplus" (typically gas, nuclear, or hydro). Storage can help at the margins, but it cannot substitute for healthy energy capacity or the transmission lines needed to deliver it.

The economics of depending on batteries only work if the spread between high and low prices outweighs the full lifecycle cost. That means installation costs, financing, round‑trip losses, degradation, and eventual replacement must all be covered by savings from demand‑charge reduction and arbitrage. Two big killers are worth emphasizing: (1) round‑trip efficiency losses (meaning you lose meaningful energy putting it into and taking it out of the battery) and (2) degradation/replacement, since a battery isn’t a reservoir but a piece of equipment with a finite cycle life.

I’d really like to see one representative PowerTown project: battery size (kW/kWh), installed price, expected cycles per year, tariff structure, and projected annual savings. Localized batteries may make sense for certain peak‑price tariff situations, but year‑round grid reliability requires a much higher burden of proof than these one‑off economics.

Local batteries can ride through short outages and clip peaks, but I need more evidence before I’d believe they can economically cover multi‑day regional shortages, especially in bad weather. A real grid must be able to handle the full range of conditions, not just sunny days and mild peaks.

I’m more optimistic about ultra‑dense, inherently dispatchable energy sources like nuclear, especially small modular reactors and microreactors, which are local and produce actual power, unlike batteries. But getting there requires a major overhaul of Nuclear Regulatory Commission rules that currently make nuclear far slower and more expensive than it needs to be.

One more issue: where are all these batteries supposed to come from? Most building‑scale and grid‑scale batteries today are lithium‑ion, which rely on lithium, nickel, cobalt, graphite, plus large amounts of copper and industrial processing. The U.S. and its allies remain heavily dependent on foreign (often China‑influenced) supply chains for mining, refining, and components. The U.S. can source enough batteries for profitable niches like building-level peak shaving but scaling that to the entire national grid is an entirely different question. I’m skeptical we’ll have the material supply, manufacturing capacity, or budget to battery‑ize the U.S. electric system at anything close to the scale some people imagine.

While perhaps this strategy can work in certain areas at a small scale, I'm skeptical that it's a way to revive America's power infrastructure as a whole. But I'm open to the possibilities; just make sure we’re using the right heuristics, comparing these ideas against what the grid actually needs to stay reliable, resilient, affordable, and dispatchable.

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