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If you have been following battery energy storage developments for a while, you know the prospect of solid-state batteries is both real and seems to perpetually not arrive. Many of us might like to speculate what will happen when solid-state batteries are readily available to be used in electric vehicles and stationary energy storage because they have greater energy density and weigh less — two distinct advantages over current battery chemistries.
Helios Horizon recently completed a test flight of an electric airplane using solid-state batteries while carrying a human pilot. That is, it wasn’t an unmanned electric airplane or “drone,” but one with a normal human pilot.
Miguel Iturmendi, founder and chief test pilot for Helios Horizon, answered some questions about the test flight for CleanTechnica.
What is the plane size and how many passengers were there?












