[mikeyouse]

Last summer LightSail announced they had completed a full-pressure test of their containment structure at 200 atmospheres. [1] And Danielle Fong tweeted that their pressure tank survived the 'gunfire test'.[2]

The last update I saw showed complete cycle pilot tests in 2015 with deliveries to customers EOY 2015 / early 2016. They should be to market much faster than the OP version since LightSail is working on ~.5MW - 1MW installations and OP is working on much larger versions.

[1] - https://twitter.com/DanielleFong/status/474369529326219264 [2] - https://twitter.com/DanielleFong/status/523188555988746240