207Mitigations of Human Impacts through Technology
carts, forklifts, power tools, hybrid and all-electric vehicles, and so forth.
Our interest here is primarily in grid energy storage applications where the
variable DC outputs of solar (PV) arrays and some WTs can be stored and
inverted to line-frequency AC as needed. A table of rechargeable battery
specications is given in Table 4.8.
Because of their importance in sustainable transportation, research on
rechargeable storage batteries is a very active area. Objectives include mini-
mizing weight while maximizing the energy density (megajoules per kilo-
gram, watt-hours per kilogram, or watt-hours per liter), minimizing cost
per watt-hour, minimizing the self-dis