Storage

Battery Systems

  • Saltwater
Aqueous Hybrid Ion (AHI) Chemistry Battery
Aquion Energy, the makers of a saltwater battery that can power your off grid home for 10 years
  • lithium ion
  • forklift and golfcart battery

Kenetic Energy

  • flywheel
  • hydro storage

Thermal

  • hotwater tank

 

Chemical

  • hydrogen
  • methane – biogas above/underground resovior for storing methane.
image credits Christian Riuji Lohri

https://www.genstattu.com/catalogsearch/result/?q=16000 i have seen batteries like this combined for aircrafts if you need portable power.

https://www.youtube.com/watch?v=ZyfXvFicp8M free power from powerlines