[db65edfc7996]

One thing that is unclear to me - are there items that need to be replaced/regenerated? The article says the costs are mostly capital. If true, on a long enough timeline, are you not just looking at entirely operational costs (sourcing water + electricity)?

[rmcginnis]

Yes, only inputs are air and electricity. If you have an equipment payback of only a few years, then after that all fuel is close to opex only. Similar to solar itself.

[ncmncm]

The chemical reagents are not consumed in operation, but they could be subject to contamination over time, and need to be replaced periodically.