Here are a few resources for energy storage:
DOE Global Energy Storage Database
The DOE Global Energy Storage Database provides free, up-to-date information on grid-connected energy storage projects and relevant state and federal policies.
Off Grid Calculator
The Off-Grid Solar Panel System Calculator helps you size the battery bank, watts of solar panels and the solar charge controller you need.
Trojan Battery Company | battery capacity calculator
The calculator recommends batteries based on your inputs and the results are ranked according to cycle life performance.
Energy Storage Association
National trade association for energy storage in the USA