Sri Lankan teenager builds solar-powered tuk-tuk from scraps [video]
Having the solar cells on the side looks like a wrong design. But let's assume there is some on the roof. 1sqm of panel in Sri Lanka shd generate 150 Watts during clear day, according to one source you need 6.8kwh (which sounds too high for me) for 20km im urban area, 44hours of charging. 2sqm 22 hours.