They said in the demonstration it output 25kWh, that doesn't mean that is all it is capable of. 5 Volt batteries at 16kWh each is 80kWh, assuming they are down to 70% life, that's still 56kWh.Good article but some of the numbers are inconsistent.
1) There are 5 batteries in the module.
2) Together they provide 25 KW and 25 KWH.
3) The average American home uses 29 KWH/day.
4) The module provides 2 hours of electricity for 3 - 5 American homes.
This is a great idea but it will lose credibility if the claims appear to be flaky.