Climate Policy

[Zenda]

I spent quite a bit of time debunking that myth on the lounge before.

That looks to be the same nifty calculation that you used before, yes.

Let's take a closer look. I don't agree with every assumption you made, but we'll step over that and concentrate on the mathematics.

With a yearly mean value of 140 to 160 W/m2, let's say 150 w/m2, and efficiency of 20%, we arrive at 30 W/m2. That is not the same as 480Wh/m2 (summer) or 256Wh/m2 (winter) for a day. The number you started with is a yearly mean, and already compensates for nights. So, the average daily yield would be 24*30 = 720 Wh/m2. So, with 20000 Wh needed per day, an area of 28 m2 would be enough.

Next, to compare prices, you use $2/W as a basis and add about 50% for other provisions. Let's make it $3/W, then. Since you already have corrected for 80% inefficiency in the previous part of the calculation, that $3 would be for each netto Watt. So, 28 m2 would cost 3*30*28 = $2520. Now, is that per day? No, that's for the lifespan of the installation. At 20 years, that would be $10.50 per month. That seems a lot lower as $270 per month to me.

If you want to argue that nights should still be accounted for, multiply the $10.50 by 3. If you think there should be another reduction of 80% somewhere, multiply the $10.50 with 5. Do both, and you'll still be below the $270.