I don't know about you, but I can now buy a safe, cheap battery for my solar installation, less than 250€ for 2kWh. Somehow, some of the breakthroughs talked a

I don't know about you, but I can now buy a safe, cheap battery for my solar installation, less than 250€ for 2kWh. Somehow, some of the breakthroughs talked about in those countless breathless articles over the last decade must indeed have arrived eventually. And with sodium ion etc. this impressive development will continue. PS: This article in particular seemed to be very early research.