Charles Fritts invented the first working selenium cell in 1883 and installed the world's first rooftop solar array using these cells on a New York City rooftop in 1884, marking the beginnings of solar power innovation. A typical mobile phone charger uses between 0.006 to 0.014 kWh to fully charge a phone, meaning that even charging daily would use only 2-5 kWh per year. Some buses in India have been outfitted with solar chargers to provide power for passengers' mobile devices.

1. SOLAR INNOVATION
Charles Fritts is American inventor credited with creating the
First working selenium cell in 1883
The world first rooftop solar array using Fritts selenium cells
was installed in 1884 a New York city rooftop

3. MOBILE PHONE
• A typical mobile phone charger is rated at anywhere between 3-7 (source:
Lawrence Berkeley lab) while charging which means even if your phone
takes 2 hours for charging it will just consume 0.006 to 0.014 units or kwh
of electricity to charge which means even if you charge
• Which means even if you charge your mobile phone every day will spend
only 2-5 units in the whole year

5. SOLAR CHARGER IN BUS

9. REFERENCE
https://ksrtc.karanataka.gov.in
https://energyusecalculator.com
https://www.indiatoady.in
http://www.smithsonimng.com