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Offgrid Energy Labs Raises $15 Million to Scale Zinc-Bromine Battery Alternative

The startup is shifting from lab R&D to a UK pilot in early 2026 ahead of a planned India gigafactory.

Overview

  • The Series A is led by Archean Chemicals with participation from Ankur Capital, and TechCrunch reports a post-money valuation around $58 million and a 21% stake for Archean.
  • Offgrid will use the funding to build a 10 MWh demonstration facility in the United Kingdom targeted for the first quarter of 2026.
  • The company says it expects to begin commercial sales by the first quarter of 2026, with a larger manufacturing plant in India planned as the next phase.
  • Offgrid’s ZincGel uses zinc‑bromine chemistry and a water‑based electrolyte, which the company claims offers 80–90% of lithium’s energy efficiency at lower cost with longer discharge capability and reduced fire risk, including operation down to −10°C.
  • Early testers include Shell and Tata Power, and Offgrid says it has secured more than 25 IP families and over 50 IP assets across major markets.