As we move closer to more sustainable energy infrastructure, Tesla, GE (General Electric) and LG Chem, are developing various battery-storage technology solutions, which could in theory provide a back-up system for consumers during blackouts. 

Will we see the "Powerwall" and others, become vital part of our homes, here in the UK? 

Of course this is a new, and ever evolving technology, with new innovations, so there is always a danger that the technology is quickly superseded by the next big thing. What will supersede the rechargeable lithium-ion battery unit?