Nissan has been working on a solution (ROAM) to recycle used electric vehicle (EV) batteries. Batteries that are cycled beyond their usable life span for vehicles.
Nissan has developed a device called a “Roam”. A cube made up of lithium-ion battery cells. Cells that have been pulled from Nissan electric vehicles.
A “Roam” can store up to 700Wh of energy, offering 1kW worth of output.
When the “Roam” is combined with a 400W Solar panel it can provide ample power to most RV type trailers. Enough to provide enough power for a week without being recharged.
The “Roam” could be charged in approximately one hour when plugged into a suitable power outlet.
While this is still a concept, not in production, it shows possibilities for recycling EV batteries that may not still be suitable to power a vehicle. But still usable for other purposes. Thus extending their usable life.
For more information, do a internet search on Nissan Roam, or Nissan x OPUS.