Sun King Eco
Greenlight Planet Inc.
Greenlight Planet SunKing Eco Pay As You Go (PAYG) Angaza Eco: Solar study light with pay-as-you-go financing option.
Note that as of July 2016, this product is no longer in production.
Kerosene lamps and lanterns, d.light S20, Firefly Mini Gen 2.5, Sun King Pro SK-301 Solar Lantern, ToughStuff Desk Lamp Kit, Sun King Solo, Marathoner MB2-200, Sunlite4, BG-BL03 Solar Lantern
Low income, off grid consumers in Africa and Asia.
IP Protected (Patent Unknown)
Initially through Greenlight Planet’s distribution network and eventually through their partners.
Unknown. (product launched in January 2015)
The SunKing Eco is designed to be paid off over the course of 10 weeks using an imbedded chip in the solar lantern and mobile payments. The solar lantern has three brightness settings and can run continuously on its normal setting for 8 hours on a full charge.
Dimensions: 26.16×17.78×15.24cm, 0.5443kg
Replacement batteries, as well as replacement battery specifications, are available from the product manufacturer.
Targets: 25 Lumen output, 30 hours of light on one day’s charge, 5 years of battery life, lightweight, high durability,
Results from Lighting Global Turbo (not tested on Medium or Low settings): Battery run time (8.1 hours); Run time per day of solar charging (8.1 hours); Total light output (27 lumens); Total area with illumination > 25 lux (220 m2)
The Comprehensive Initiative on Technology Evaluation (CITE) at MIT evaluated personal-use solar lanterns available on the market in Uganda and published the results in January 2015. The SunKing Eco received a score of 50/100. Full findings are available in their report and as a snapshot synopsis is available in the image included here.
Payment: Mobile phone access facilitates easier payments for product.
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Pailman, W.L., Kruger, W., Prasad, G., Mobile payment innovation for sustainable energy access. DUE. 2015 Mar 31-Apr 1;2015 International Conference:39-44.
Solanki, C.S., Mudaliar, S., Strategies to target rural PV market in developing countries – a perspective. PVSC. 2010 Jun 20-25;35:2392-2396.
Dzombak, R., Mehta, C., Mehta, K., Bilen, S.G., The relevance of systems thinking in the quest for multifinal social enterprises. Systemic Practice and Action Research. 2013 Dec 14;27(6):593-606.
In compliance with Lighting Global, Global Quality Standards: Truth in Advertising Lumen Maintenance Quality Warranty IEC 62257-9-5 ed 2.0 Polycarbonate & ABS IP64 rated
Greenlight Planet Sun King Eco was tested according to the Quality Test Method in the latest edition of IEC 62257-9-52 and met the Lighting Global Quality Standards.
The Comprehensive Initiative on Technology Evaluation (CITE) at MIT evaluated personal-use solar lanterns according to comparative framework for evaluation of products, similar to the model used by the U.S. nonprofit organization Consumer Reports along the dimensions of Suitability, Scalability, and Sustainability. Students and faculty collected data on 11 solar lantern models from both field and laboratory tests, as well as through interviews, surveys, and participant observation of product users and Solar Sister distribution agents.
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