&gt; <i>&quot;Practically speaking there hasn&#x27;t been a lot of large scale CSP done…&quot;</i><p>Maybe not in the United States, but it has taken off in Spain (looking at Wikipedia I cited earlier, which is probably better suited to take advantage of it in theory since installations are near population centers). I see far more interest oversees than in the United States… which is not surprising considering all the entrenched players that simply don&#x27;t have the influence to the same degree in other places.<p>I can agree with this statement to some degree: &quot;It&#x27;s not suited for small scale deployments. Which makes it quite complementary to rooftop PV.&quot;, but seeing how it&#x27;s serving a need that PV has not been able to provide to date despite it all, I&#x27;d hardly say its &quot;go big or go home&quot;, there&#x27;s far more abundant sodium and potassium available in the earth&#x27;s crust vs lithium.