In a country notorious for a lack of electricity, many North Koreans are taking power into their hands by installing cheap household solar panels to charge mobile phones and light up their homes.

Apartment blocks in Pyongyang and other cities are increasingly adorned with the panels, hung from balconies and windows, according to recent visitors to the isolated country and photographs obtained by Reuters.

"There must be at least a threefold increase in solar panels compared to last year," Simon Cockerell, who visits North Korea regularly as general manager of Beijing-based Koryo Tours, told Reuters from Pyongyang. "Some are domestically made, so that may have driven prices down."