- How It Works
- Browse Tech
- Browse Campaigns
- Get Involved
Greenlight Planet’s Sun King Pro™ defines the industry’s gold standard in affordable solar-powered lanterns with mobile-phone charging capability.
Sun King™ Pro features the first Lithium Ferro-Phosphate (LFP) battery, a breakthrough technology that delivers an unprecedented 5 years of daily performance (2000 cycles) even in the most demanding rural environments. Sun King™ Pro is 10x brighter than a kerosene lamp and provides up to 30 hours of light on a single day's charge.
Light runtime after one sunny day of solar charging:
1. Bright Home Lighting
2. Smart Phone Charging
Equipped with a universal, 5-volt nominal power output port and 6 phone adapters, compatible with virtually all mobile phones, enabling users to charge nearly any mobile phone day or night.
3. Real-time LCD Display
Sun King™ Pro LCD display provides a live estimate of the number of hours and minutes of light runtime remaining, allowing users to easily balance lighting and phone charging needs based on the amount of battery power available.
4. Breakthrough Longevity
Revolutionary Batteries. Unlike lamps, using cheaper, short-lifetime lead-acid, Ni-Cd, or Ni-MH batteries, Sun King™ Pro Pro LiFePO4 (LFP) battery maintains over 80% of its original capacity after five years (over 2000 cycles). LFP batteries also have a lower self-discharge rate than other battery chemistries, meaning distributors and retailers don't have to worry about batteries that are drained by the time they are sold (one year of storage is guaranteed under warranty).
Unbeatable Solar Panel Durability. The Sun King™ Pro uses a detachable industrial-grade glass solar panel with an aluminium frame, repairable junction box, and a five-meter cable.
LEDs: Single 1-watt power LED with heat sink. Minimum luminous flux: 120 lumens. 10-year life (15,000 hours).
Battery: Lithium Ferro-Phosphate (LFP) 6.6V, 1450 mAh, 2000 cycles at 100% depth of discharge.
Solar Panel: 2.5Wp, 8.7V polycrystaline solar module with 5-metre wire, industrial-grade glass/aluminum framing.
Enclosure: Polycarbonate and ABS. IP54 rated, water-sealed enclousure with additional sliding cover and rubber gasket to protect electrical charging ports.
Battery life indicator - While in use, LCD screen displays the number of hours of light remaining, in any given mode.
Charge indicator: Displays charging effectiveness on a scale 1 through 5 to help optimize panel placement.
Electronics: Yet another industry first. Multi-cell-battery cell balancing for extended battery life. Microprocessor-based active charge controller prevents over-charging or deep discharge of battery. Smart battery management technology automatically switches out of high power modes when battery is running low, yielding five additional hours of low power light.