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by qball
458 days ago
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Because it's the one green solution that actually works as base load (other than hydroelectricity, but that's terrain-dependent), works 24/7 without any other affordances, and doesn't open you up to dependence on other nations to anywhere near the same degree. Solar and wind are only cheap because a foreign nation makes the parts (if they were made domestically they wouldn't be cost-competitive, obviously). So in 20 years, when your PV panels are degrading and your turbines are wearing out, that foreign country's going to be able to charge you a lot more to replace it. And if you want to see the results of cheap industrial inputs becoming expensive one only need look at the post-Nordstream German/European economic forecast. Even the poor should be able to afford to keep the lights on and the A/C running once the sun has set. |
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Solar panels won't start degrading in 20 years. Their degrading is linear and starts when you install them. As a very rough guide you can think of it as 1% per year.
The 20-year horizon therefore is not fixed. It's just a round number. There's a point at which it makes sense to add panels (or replace them if you are space constrained.)
Once large numbers of panels start getting replaced you may see them reused in space-available places, or potentially 'reconditioned' to extend their life. Think of it as similar to second-hand cars.
Of course if the price keeps dropping these avenues are less attractive. And if you are space constrained there are already space improvements that may make changing desirable well before 20 years.
Finally, lots of things we use are made elsewhere. And we make things others use. By trading our excess for their excess we create a trading relationship where both sides operate in good faith because it is in their advantage to do so.
The current climate, where the US operates in bad faith, and seems intent on damaging trade relationships, does not encourage other countries to behave well in the future (regardless of the motivations you (project? expect?) from them in the future.