http://www.wiwo.de/technologie/green/tech/stromspeicher-weltweit-groesstes-off-grid-batteriesystem-entsteht-in-ruanda/13817014.html : Company Tesvolt from Germany is about to built the world’s largest off grid battery system with containers in Ruanda. http://www.royal-alliance.net/archive/89-storage-batteries-batteries-for-stationary-storage-and-e-vehicles-e-mobility.
25 April 2016 For off-grid-places as construction sites a „green“ battery based on Lithium can be used, in case normal grid has a brown-out, i.e. the grid does not work. http://green.wiwo.de/solarstrom-to-go-neue-generatoren-arbeiten-ohne-diesel/#comment-175510
