SMRTR Science & EngineeringOct 2, 2025Interesting Engineering

German students build mobile energy trailer using solar, battery and hydrogen

SMRTR summary

German engineering students at Dortmund University created a mobile energy trailer that combines solar panels, battery storage, and hydrogen fuel cells to provide off-grid electricity for festivals, crisis zones, and research missions. The eTrail-Ing system delivers nearly 4 kilowatts of power, operates independently for seven days, and includes cooling capabilities for medical supplies or beverages.

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