25. Solar-charged table lamp: an off-grid solution from Cartel
Title: How to sell table lamps in areas without a stable power grid? Kaltai's solar energy strategy
Energy Innovation:
Measurement data:
✓ 4 hours of sunlight, 30 hours of battery life
✓ -20℃ to 60℃ normal operation
Cases of cooperation with the government:
✓ Rural school lighting project in Tajikistan