{
  "id": 2391265,
  "title": "Karetic Energy is building iron-air batteries to store power for days rather than hours",
  "url": "https://urgent.news/2026/08/21/karetic-energy-is-building-iron-air-batteries-to-store-power-for-days",
  "topic": "business",
  "section": "Business",
  "published": "2026-08-21T13:40:28.000Z",
  "source": {
    "name": "YourStory",
    "slug": "yourstory",
    "url": "https://yourstory.com/2026/08/karetic-energy-iron-air-batteries"
  },
  "original_language": "en",
  "account": "Karetic Energy, a Bengaluru-based startup founded in 2022, is developing iron-air batteries to provide long-duration grid storage for renewable energy. Founded by Dr Suryanarayana Vikrant Karra and Prabhakar Kumar, the company aims to address the limitations of short-duration storage solutions for solar and wind power. Unlike traditional lithium-ion batteries, Karetic's iron-air batteries use abundant and inexpensive materials, such as iron, air, and water, to enable long-lasting power storage. The startup's technology is rare-earth-free and non-flammable, which reduces supply chain risks and enhances safety for large-scale installations. Karetic claims its iron-particulate bed architecture effectively suppresses hydrogen evolution and surface passivation, allowing for continuous discharge cycles of up to 145 hours. This multi-day flexibility could bridge the gap between renewable energy generation and grid demand, enabling applications such as utility-scale storage, industrial microgrids, and renewable farms. The company's modular, pilot-ready systems are positioned for utility trials, with laboratory performance figures demonstrating the potential of their iron-air battery platform.",
  "summary": "The company is developing long-duration storage using iron and air, aimed at the multi-day gaps that solar and wind leave and that lithium cannot economically fill.",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}