Sorry but the theoretical price of cells isn’t relevant to the consumer. The price of products containing them is. This thing costs currently on the official site 900€ (with some sort of sale going on). The Elite 100v2 with comparable capacity, but using LiFePo4 (included in the same current sale) costs just 550€. To add insult to injury, it also outperforms the Na model in nearly every aspect except sub-freezing performance. This includes an abysmal solar charging efficiency of roughly 50% at normal temperature. Somehow.

Again, once the price reflects the cell cost, this could be a very attractive option. At the moment, unless you’re into camping in sun-zero climates, it’s just a very bad deal.