Technology Evaluation of the Yotta SolarLEAF: A Panel-Based Thermally Managed Battery Module

Research output: NRELTechnical Report


In 2019, the United States installed 13.3 gigawatts of solar energy production capacity. This demand for solar will continually increase as the phasing out of fossil fuels continue. As the demand for solar energy grows, so does the demand to store this generated energy. It is projected that by 2035 the global demand for stationary energy storage will reach the terawatt scale. So, scalable solutions with suitable thermal management systems are required to meet future demand. Yotta Solar has developed an ESS system, the YottaLEAF, that provides solar energy storage without increasing the footprint of solar arrays.This is particularly useful in applications with limited space (e.g., building roof) and where large scale batteries require strong requirements for fire suppression systems. As part of the Wells Fargo Innovation Incubator (IN2), the National Renewable Energy Laboratory (NREL) has conducted a third-party technology validation of Yotta's alpha prototype. The report includes the objectives, technology description, methodology, and results from experiments conducted at the Thermal Transfer Facility (TTF) at NREL.
Original languageAmerican English
Number of pages48
StatePublished - 2021

NREL Publication Number

  • NREL/TP-5500-76817


  • battery thermal management
  • decentralized storage
  • phase changing material
  • solar-plus-storage system


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