Walter is right about what, exactly? That heat can be transferred between objects? That heat can be released from objects? Nobody ever refuted those, and those are the only points he has made so far in defense of rocks being a be-all end-all solution which, again, doesn't factor in any of the actual physics involved which make it inefficient.
If you need evidence of that, feel free to read any of the provided materials, especially the concrete heat storage systems that have already been built which, unsurprisingly, use 2x as much electricity to store 50% as much heat.
So, unless you have actual information to provide, you saying I'm wrong doesn't add anything to the conversation.
