Sun King Pro SK-301 Solar Lantern

Greenlight Planet Inc.

Snapshot
Manufacturing & delivery
Performance & use
Research & standards
Feedback

Product description Brand name and product description

Sun King Pro SK-301 Solar Lantern: Multi-purpose solar lantern.

Target region(s) Target region for distribution/implementation (listed by country if specified)

Distribution is international, primarily Africa and India with offices in China

Distributors/implementing organizations Organization(s) distributing/deploying this product directly to communities/individuals?"

The lamp is deployed by Greenlight Planet’s village-level direct sellers, Kopernik, Flipkart.com, Amazon.com.

Living Goods also distributes this product.

Market suggested retail price Price per unit or service price per usage/terms (USD). Subsidies noted.

$49.95 USD Greenlight Planet

$40 USD Kopernik.

Competitive landscape Similar products available on the market. May not be a comprehensive listing.

d.light S2 and S300 series, Tough Stuff Superbright LED Lamp, Minda LED lantern 2W, BPL SSL 200 LED Emergency Lights, Nuru International NL1, Luci, Nokero N200

Kerosene lamps and lanterns.

SDG targeted United Nations Sustainable Development Goals (SDGs) targeted with this product/application/service

Goal 7: Affordable and Clean Energy

Target user(s) Target user/consumer base (country, income segment)

Target users and consumers are the 1.6 billion people in emerging markets, who use kerosene oil lamps for home lighting.

Manufacturing/building method(s) Detail regarding solution production or construction method (instructions, mass production capacity, custom made,etc...)

Mass produced.

Product Intellectual Property Open source/IP protected (note patent)/trade secret/other?

IP Protected

User Provision Model Where can the product be purchased/acquired by end users?

The lamp can be purchased through the Greenlight Planet website, Kopernik, Flipkart.com, Amazon.com and other retailers. Greenlight Planet products are currently available in over 20 countries globally, managed out of offices in India, China and resellers such as SunPower Africa. Greenlight Planet’s sales channel is comprised of village-level direct sellers, called Sun King Saathis, who sell products in their local communities.

Distribution to date Number of units that have been deployed, downloads or users to date

Unknown (Greenlight Planet has reached 1,500,000 households across norther India)

Fields marked are sourced values that have been evaluated by the manufacturer or a third party, all others are design specifications.

Lamp type

Type of light bulb

LED

Number of light points

Total light output (lumens)

A measurement of the brightness level of the lantern

High: 110 lumens

Multiple brightness settings (yes/no)

Can the brightness level be adjusted?

Yes

Light duration on single charge (hr)

Duration of lighting after a full charge

Unknown

Mobile charging (yes/no)

Can the user easily replace the light bulb if needed?

Unknown

Power source

Type of energy used to power the lantern

Solar Panel

Battery type

Type of battery used

Lithium Iron Phosphate

Peak power rating (Wp)

Peak power rating of the solar panel in standardized sunlight conditions, provided by the manufacturer

Unknown

Battery capacity (kWh; mAh)

Manufacturer-specified battery capacity

Unknown

Battery nominal voltage (V)

Manufacturer-specified battery voltage

Unknown

User replaceable battery (yes/no)

Can the user easily replace the battery if needed?

Yes

User replaceable light (yes/no)

Can the user easily replace the light bulb if needed?

Unknown

Design specifications Component and Operation overview including power, portability, facility requirements, preventative maintenance and user training requirements

*Design*

Water-sealed lamp and stand, industrial-grade photovoltaic technology with improved cloudy-day charging. Permanently roof-mountable solar panel with aluminum frame and 5-meter cord. 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. Single 1-watt powered LED with heat sink. 5-volt nominal power output port.

• Battery: Lithium Ferro-Phosphate (LFP), 140mAH, 1800 cycles at 100% depth of discharge.

• Solar panel: 2.5Wp, 7.8V polycrystalline solar module with 5-m wire.

• Detachable solar panel with 5-meter cable.

• 5-volt nominal power output port and 6 phone adapters.

• LCD screen indicating the number of hours of light remaining.

Product schematics Design and assembly illustrations

Not available. However images of the lamp can be found on the designer’s website.

Technical support Technical support provided by

Technical support not identified. As it is provided by village level direct sellers support can be available through local sellers. Otherwise any repairs and replacements while under warranty can be addressed to Greenlight Planet directly.

Replacement components Availability of replacement components (in-country, by order,...)

No maintenance required. Manufacturing defects covered under 1 year manufacturer’s warranty

Lifecycle Disposal and warranty

1 year manufacturer warranty. Disposal not specified but of most concern is the battery, electronic components and the solar panel.

Manufacturer specified performance targets Designer / Manufacturer specified targets

*Performance targets*

• Bed light mode: 20 lumens, 30 hours of light or 15hours of light after charging phone fully.

• Normal power: 40 lumens, 12 hours of light or 6 hours of light after charging phone
fully.

• Turbo power: 100 lumens, 6 hours of light or 3 hours of light after charging phone
fully.

• Battery: Lithium Ferro-Phosphate (LFP), 140mAH, 1800 cycles at 100% depth of discharge.

• Five years of daily performance (2000 cycles) and five year battery life. LEDs 10-year life (15000 hours).

Additional specs available here and here.

Vetted performance Findings of manufacturer evaluations or independent testing centers

From the Lighting Global Standardized Specifications Sheet:

• Lumen output (maximum): 110

• Lumen output at 2000 hours (maximum): 110

• Lamp type (LED, CFL, etc.): LED

• Run time (maximum): 15 hours “normal”, 6 hours “Turbo”

• Battery Capacity (amp-hours): 1.45 amp-hours

• Battery Protection (charge controller, cell balancing, etc.): Active HVD and LVD,
individual cell balancing

Additionally, 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 Pro received the highest score of 88/100. Full findings are available in their report and as a snapshot synopsis is available in the image included here.

Testing organizations Independent lab, academic research centers, etc.

Tested independently by Lighting Global (see verification of product quality) and the Comprehensive Initiative on Technology Evaluation (CITE) at MIT

Safety Potential hazards / risks related to operation of this product

No listed hazards.

Complementary technical systems Performance of this product is improved with another technology (eg. Cookstoves and Wind-blocking skirts)

Some users have commented that selling the lantern head separately for those that already have the panel for charging could be a good idea, improving the battery life along with increasing the charging compatibility for additional cell phone types.

Academic research Academic research related to the product (e.g. published papers in peer-reviewed journals)

Sun King, Greenlight Planet mentioned in: Lighting AFRICA. (2011). International Trade Forum, (1), 16-19.

Compliance with regulations Product certifications and standards referenced by designer/manufacturer

IEC Technical Specification 62257-9-5 which is informed by Lighting Global’s three complementary sets of test methods —the Quality Test Method (QTM), the Initial Screening Method (ISM), and the Market Check Method (MCM). Factory certification- ISO 9001:2000.

Evaluation methods Evaluation methods/protocols/guidelines referenced by designer or manufacturer.

The Quality Test Method (QTM) is the full test method used to verify comprehensive product performance. Results from QTM testing are used to determine if a product has met the Lighting Global Minimum Quality Standards.

Lighting Global Durability tests passed: Drop test, switch cycling, physical ingress
protection test, and protection from frequent rain.

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.

Other information

None

In context photographs (0)

You can use the form below to contribute a photo of this product.

In context files & documents (0)

Feedback from users, customers & distributors

Please let us know your experience in using this product through comments below.

Snapshot

Product description Brand name and product description

Sun King Pro SK-301 Solar Lantern: Multi-purpose solar lantern.

Target region(s) Target region for distribution/implementation (listed by country if specified)

Distribution is international, primarily Africa and India with offices in China

Distributors/implementing organizations Organization(s) distributing/deploying this product directly to communities/individuals?"

The lamp is deployed by Greenlight Planet’s village-level direct sellers, Kopernik, Flipkart.com, Amazon.com.

Living Goods also distributes this product.

Market suggested retail price Price per unit or service price per usage/terms (USD). Subsidies noted.

$49.95 USD Greenlight Planet

$40 USD Kopernik.

Competitive landscape Similar products available on the market. May not be a comprehensive listing.

d.light S2 and S300 series, Tough Stuff Superbright LED Lamp, Minda LED lantern 2W, BPL SSL 200 LED Emergency Lights, Nuru International NL1, Luci, Nokero N200

Kerosene lamps and lanterns.

SDG targeted United Nations Sustainable Development Goals (SDGs) targeted with this product/application/service

Goal 7: Affordable and Clean Energy

Target user(s) Target user/consumer base (country, income segment)

Target users and consumers are the 1.6 billion people in emerging markets, who use kerosene oil lamps for home lighting.

Manufacturing & delivery

Manufacturing/building method(s) Detail regarding solution production or construction method (instructions, mass production capacity, custom made,etc...)

Mass produced.

Product Intellectual Property Open source/IP protected (note patent)/trade secret/other?

IP Protected

User Provision Model Where can the product be purchased/acquired by end users?

Distribution to date Number of units that have been deployed, downloads or users to date

Unknown (Greenlight Planet has reached 1,500,000 households across norther India)

Performance & use

Fields marked are sourced values that have been evaluated by the manufacturer or a third party, all others are design specifications.

Lamp type

Type of light bulb

LED

Number of light points

Total light output (lumens)

A measurement of the brightness level of the lantern

High: 110 lumens

Multiple brightness settings (yes/no)

Can the brightness level be adjusted?

Yes

Light duration on single charge (hr)

Duration of lighting after a full charge

Unknown

Mobile charging (yes/no)

Can the user easily replace the light bulb if needed?

Unknown

Power source

Type of energy used to power the lantern

Solar Panel

Battery type

Type of battery used

Lithium Iron Phosphate

Peak power rating (Wp)

Peak power rating of the solar panel in standardized sunlight conditions, provided by the manufacturer

Unknown

Battery capacity (kWh; mAh)

Manufacturer-specified battery capacity

Unknown

Battery nominal voltage (V)

Manufacturer-specified battery voltage

Unknown

User replaceable battery (yes/no)

Can the user easily replace the battery if needed?

Yes

User replaceable light (yes/no)

Can the user easily replace the light bulb if needed?

Unknown

Design specifications Component and Operation overview including power, portability, facility requirements, preventative maintenance and user training requirements

*Design*

• Battery: Lithium Ferro-Phosphate (LFP), 140mAH, 1800 cycles at 100% depth of discharge.

• Solar panel: 2.5Wp, 7.8V polycrystalline solar module with 5-m wire.

• Detachable solar panel with 5-meter cable.

• 5-volt nominal power output port and 6 phone adapters.

• LCD screen indicating the number of hours of light remaining.

Product schematics Design and assembly illustrations

Not available. However images of the lamp can be found on the designer’s website.

Technical support Technical support provided by

Replacement components Availability of replacement components (in-country, by order,...)

No maintenance required. Manufacturing defects covered under 1 year manufacturer’s warranty

Lifecycle Disposal and warranty

1 year manufacturer warranty. Disposal not specified but of most concern is the battery, electronic components and the solar panel.

Manufacturer specified performance targets Designer / Manufacturer specified targets

*Performance targets*

• Bed light mode: 20 lumens, 30 hours of light or 15hours of light after charging phone fully.

• Normal power: 40 lumens, 12 hours of light or 6 hours of light after charging phone
fully.

• Turbo power: 100 lumens, 6 hours of light or 3 hours of light after charging phone
fully.

• Battery: Lithium Ferro-Phosphate (LFP), 140mAH, 1800 cycles at 100% depth of discharge.

• Five years of daily performance (2000 cycles) and five year battery life. LEDs 10-year life (15000 hours).

Additional specs available here and here.

Vetted performance Findings of manufacturer evaluations or independent testing centers

From the Lighting Global Standardized Specifications Sheet:

• Lumen output (maximum): 110

• Lumen output at 2000 hours (maximum): 110

• Lamp type (LED, CFL, etc.): LED

• Run time (maximum): 15 hours “normal”, 6 hours “Turbo”

• Battery Capacity (amp-hours): 1.45 amp-hours

• Battery Protection (charge controller, cell balancing, etc.): Active HVD and LVD,
individual cell balancing

Testing organizations Independent lab, academic research centers, etc.

Tested independently by Lighting Global (see verification of product quality) and the Comprehensive Initiative on Technology Evaluation (CITE) at MIT

Safety Potential hazards / risks related to operation of this product

No listed hazards.

Complementary technical systems Performance of this product is improved with another technology (eg. Cookstoves and Wind-blocking skirts)

Research & standards

Academic research Academic research related to the product (e.g. published papers in peer-reviewed journals)

Sun King, Greenlight Planet mentioned in: Lighting AFRICA. (2011). International Trade Forum, (1), 16-19.

Compliance with regulations Product certifications and standards referenced by designer/manufacturer

Evaluation methods Evaluation methods/protocols/guidelines referenced by designer or manufacturer.

Lighting Global Durability tests passed: Drop test, switch cycling, physical ingress
protection test, and protection from frequent rain.

The Comprehensive Initiative on Technology Evaluation (CITE) at MIT

Other information

None

Feedback

In context photographs (0)

You can use the form below to contribute a photo of this product.

In context files & documents (0)

Feedback from users, customers & distributors

Please let us know your experience in using this product through comments below.

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Sun King Pro SK-301 Solar Lantern

Greenlight Planet Inc.

In context photographs (0)

In context files & documents (0)

Feedback from users, customers & distributors