-40 to +70°c operating range means that for most locations and uses, the batteries will not need heating or cooling, not sure about ventilation, but if that is also unnessesary then incorporating the batteries intofull systems becomes much easier for static and mobile uses. also, as they are cheaper per kw/hr than anything else, there will be an evolution towards higher voltages, especialy for home storage ,off and grid tied, as conductor sizes can be smaller in all components, bringing costs down accross the board, pv, charge controllers, inverters will.all benifit, and if say 240v became standard, then charge contollers, inverters and pv would all run at standard domestic voltage and be significantly more efficient for round trip energy storage and use. we are on the cusp of whole lifestyle energy supplys bieng generated on a house roof and stored on site, and/or sold into the grid.