Yoshino B4000+EXB1 Expansion Battery Kit - 4000W/5173Wh

INCREASE CAPACITY – With an additional 2562Wh; this expansion battery will keep your B4000 SST running for even longer. With a full ETL certification, safety features include over voltage, over current, overcharging, over-discharging, thermal, and short circuit protection. The SST battery is rated for 4,000 cycles to 80% (11 years of everyday use). ADVANCED SOLID-STATE TECHNOLOGY—Solid-state technology (SST) is the evolution of lithium batteries, which provide safer, more compact, and lighter power output than their conventional lithium-ion or LiFePO4 counterparts. The new solid-state battery provides safer and more compact power for off-grid and recreation use. FLEXIBLE POWER STORAGE – 48V DC output is available for use when running theexpansion battery independently, an adapter is included. AWARD-WINNING COMPACT DESIGN – A single solid-state cell holds up to double the capacity of a LiFePO4 battery cell. This maximizes power efficiency in a smaller, lighter, compact unit. Why lug he