Long-life nickel iron battery functionality / cost comparison for peak demand SWER network voltage support application

SWER line voltage sags, if network upgrade is not possible, eventually require active power injection as one of the intervention technologies. Active power support can be provided by many technologies, and some of these involve battery energy storage. Nickel-iron Edison batteries are an often little known or understood battery. Compared to three other commonly available industrial batteries, and despite their design being over 100 years old, they are a still a long-life contender for large stationary battery energy storage systems. Continuing research into their design may even further improve their performance.