Thank you for the link.
A few first observations:
*Out of Carnegie-Mellon.
*They have Kleiner Perkins backing them.
*From their downloadable presentation, it could be suitable for use in our remote AK village, other than that, very unfortunately but not surprisingly, the product is good down to a T of only -5ºC/+23ºF. Such a limit can be made acceptable throughout much of the lower-48, but would be unacceptable for us. The AGM Pb-Ca battery bank we presently use can withstand -40º temps for indefinite periods of time; typical storage temps reached are sustained at -25ºC/-10ºF.