How a zinc battery works

Zinc plates out of a water-based electrolyte when it charges and dissolves back when it discharges; nothing in it can burn. Charge on midday solar, discharge for six hours into the night. Every number comes from one model.

Sources: Eos Energy, Indensity core datasheet (March 2026: 133.34 kWh; 25 kW at 4 h, 20.8 kW at 6 h, 16.7 kW at 8 h, 13.3 kW at 10 h; 33.3 kW charge; 81–88% round trip; 3,176 kg; 137 × 189 × 178 cm; 25-year expected life). The 75-core site, schedule and the inside-a-cell drawing are illustrative.