Water in Salt
Investor Portal
Water in Salt
Investor Portal
Water in Salt
Lithium-ion batteries catch fire at utility scale. Vanadium flow batteries cost $300–500/kWh and depend on a single Chinese-controlled supply chain. The world needs a safe, cheap, abundant-material grid storage technology.
WiS has developed a membrane-free static zinc–manganese battery — water-based, non-flammable by chemistry, with no pumps or forced electrolyte flow. No thermal runaway, no rare earths, no membrane. Built from commodity chemicals (ZnSO₄, MnO₂) available worldwide at <$5/kg.
| Energy efficiency (DC–DC) | ~77% (single cell, 100 cm² production format) |
| Coulombic efficiency | >90% (sustained, after formation) |
| Stable cycles demonstrated | >200 (single cell; full report in preparation) |
| Electrochemical trials | 1,275+ runs |
| Cycle life target | 25,000 cycles / 20 yr |
| System cost target (TRL 8) | ≤$100/kWh |
| BOM target (Series A) | <$70/kWh |
| No membrane | $0 separator cost |
| Round | Seed — Stage A + B |
| Raising | $3,276,923 (11,927,999 PLN) |
| Pre-money valuation | $8,000,000 (indicative) |
| Post-money | $11,276,923 |
| Investor % | ~29.1% (+ 8% ESOP pool) |
| Stage A tranche | $1.24M → TRL 6 (14 mo) |
| Stage B tranche | $2.04M → TRL 7 (16 mo) |
| Lead investor | Sought — round anchored on EU funds + equity |
| iif.vc | Term sheet signed (8M PLN, KPI-gated) — potential follow |
| Instrument | Equity (sp. z o.o.) |