Lead-acid batteries are the oldest and most mature battery technology currently in use. Lead-acid batteries are an inexpensive and popular storage choice for power quality, UPS, and some spinning reserve applications. Their use for energy management, however, has been limited by their short cycle life. Lead-acid batteries, nevertheless, have been used in a few commercial and large-scale energy management applications. The largest one is a 10-MW/40-MWh system in Chino, California, built in 1988.
GNB Industrial Power/Exide
JCI Battery Group