We don&#x27;t need to store everything.<p>We just need to store enough to make load-shifting environmentally (and commercially) available. The 30 Gigawatt Hour Bath County Station gets there (<a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Bath_County_Pumped_Storage_Station" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Bath_County_Pumped_Storage_Sta...</a>), but even the &quot;smaller&quot; Tesla 50MWhr projects do too.<p>Compressed Air is hitting 300MW-hr designs (<a href="https:&#x2F;&#x2F;www.greentechmedia.com&#x2F;articles&#x2F;read&#x2F;texas-calls-for-317mw-of-compressed-air-energy-storage2" rel="nofollow">https:&#x2F;&#x2F;www.greentechmedia.com&#x2F;articles&#x2F;read&#x2F;texas-calls-for...</a>). That&#x27;s enough for a metropolitan solar community to loadshift the 12:00 noon sun to the 5:00 dusk peak-energy period. (Average home: 30kwhr per day. 300MW-hr design would serve over 10,000 homes easily, and doesn&#x27;t need to actually hold the electric usage for the whole day. It&#x27;d realistically only need to hold 1&#x2F;10th the energy or so, to load-shift a few hours here and there).<p>ARES seems to be in the 12MW-hr to 100MW-hr design size. This is smaller than Pumped Hydro but still useful. Smaller, cheaper projects that partially solve the problem is still a good thing.<p>It seems like a perfectly good solution to the problem. Buying up cheap energy from night (or noon-power solar arrays), and selling it during the 3pm to 7pm peak-energy time. As long as there&#x27;s at least a 20% differential in peak pricing somewhere in the day, &quot;small&quot; 1MW-hr to 300MW-hr plants will be profitable.<p>----------<p>In any case: Wind continues to work at night. Nuclear works throughout the day. Hydro works throughout the day. We don&#x27;t need to store EVERYTHING, we just need to store the excess from Solar from noon, and then load-shift it to 5pm to 8pm, while the sun is setting and solar arrays generate less electricity.