Prior to the fire tests, Fluence conducted five days of explosion testing—two days of dispersion testing followed by three days of deflagration testing—continuing to lead the industry as one of the first companies to perform such a comprehensive explosion risk assessment. During dispersion testing, the system's active ventilation effectively exhausted gases as designed, in compliance with NFPA 69, demonstrating its ability to prevent flammable gas accumulation. During deflagration testing, all six deflagration panels deployed as intended, in accordance with NFPA 68, validating the effectiveness of Gridstack Pro 5000's passive safety features under extreme conditions. Gridstack Pro 5000 is designed to deliver up to 5.6 MWh of energy within a 20-foot enclosure, making it one of the highest density solutions on the market today to undergo this level of testing. To validate its safety at this scale, the system underwent rigorous testing using fully charged batteries.