2.6 Kwhr Energy Storage System – Lithium batteries 12 Volts connected in series. Pack Voltage Nominal 12 VDC; Pack Voltage Peak 16 VDC; Cycle life 3000 Cycles; Five year prorated warranty. Includes Battery Management system, cell monitoring of temperature and voltage control. Includes fuse and contactor [ battery disconnect]. Works seamlessly with most leading solar charge controllers and inverters. Max Charge voltage not to exceed 14.4 VDC. Cell balancing at .75 amps. $1650

http://www.balqon.com/store-2/#!/Lithium-Battery-Storage-2-6-kwhr-2-week-Lead-Time/p/38377246/category=2860254