That's really cool, would be a really impressive thing to see in operation.
Love the write up too, like the idea of it working at a different pace - maybe it's designed in a way that it's got a section that's filled up with broken and sorted scrap that feeds in whenever it's hot enough to run - that way most the work would likely be done on cloudy days, after it's run for a few days they come in and refill the giant hoppers with scrap and when that's done they go take all the bars or forms it's made - probably like one of those huge industrial ones that have the conveyor belt of moulds that get filled then roll along something just long enough that they're cool enough to dump out when it gets to the end and inverts dropping it into a huge pile as the mold goes round to get refilled.
and yaeh totally agree about the street cars, something i really love about solar punk is that thing of using whatever works for a locality rather than the current global trend of one-size fits all. It would be great being able to travel and actually see different things again, like nearer the equator you'll see more sun based stuff and up here at 50N we'll have some mostly associated with summer activities and a lot more wind power, in arid regions they'll prefer processes that don't require or can't tolerate much water where as here we'll build under the assumption that for most the year eveything's damp. it certainly would be a more interesting world. I think localized industry is the key, especially a model when things are designed on a global scale through open source collaboration but selected and assembled locally to fit with the culture, tastes, requirements and available resources of the area.
would be a great place to cook, and to relax while other people cook. love the kitchen garden in the kitchen.