What IP would be present in this device? It just seems like a cleverly-designed condenser - water coolers that refill via humidity condensation are cheap and c

What IP would be present in this device? It just seems like a cleverly-designed condenser - water coolers that refill via humidity condensation are cheap and common. Is it the fact that it's self-powering? That might be an interesting innovation, but the article doesn't talk about that, it just focuses on condensation, which by itself certainly isn't patentable.