Off-grid applications company Eight19 has launched the new IndiGo, a pay-as-you-go personal solar electricity system for the developing world.

The IndiGo system includes a solar panel, a battery unit with in-built mobile phone charger and a high-efficiency LED lamp.

The solar electricity system combines solar and mobile phone technology, which allows users to light their homes and charge mobile phones as a service, paid for using scratch cards.

Commercial rollout of the system is expected to start next year.

Eight19 said in a statement that over a fifth of the world’s population lack access to electricity via a grid and pay high prices for kerosene to serve basic needs such as lighting.

"By offering solar power as a service, without high purchase costs, users can now access clean electricity for less than their current spend on kerosene," the company added.