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Be ready for power outages. Instant, reliable, indoor USB power using just a candle and water - stay charged and connected.
Be ready for power outages. Instant, reliable, indoor USB power using just a candle and water - stay charged and connected.
Be ready for power outages. Instant, reliable, indoor USB power using just a candle and water - stay charged and connected.
860 backers pledged $71,281 to help bring this project to life.

About this project

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Candle Charger: Emergency Power Generator for Smartphones

$71,281

860

THIS POWER IS YOURS!

The Candle Charger by Stower is the first indoor power plant for smartphones. Candle + water = essential USB power for your home during grid outages and blackouts. Stay charged...no matter what.

  • Stay connected to family and friends 
  • Ultra dependable 2.5W USB power source - indoors or out
  • Six hours per candle - fully charge 2 smartphones
  • New, personal energy design for ready storage and use.  

TIME - "Should be in your emergency kit"

News Ledge - "Its a damn cool product"

FastCo - "A product everyone should have in their homes"

When power outages hit, staying connected to family, friends, and emergency services is critical. But how to keep charged?  

  • Batteries store power - they don't make it 
  • We love solar, but it doesn't work at night or indoors
  • Hand cranks produce minimal power. 10 hours cranking to charge a phone? That's tough. 

We want a reliable solution, and the Candle Charger is the first indoor generator designed to charge smartphones and keep them charged.

The Candle Charger is a safe, miniature power plant that provides on-demand electricity when the grid can't. It's power we control, anywhere we need it - indoors or out, day or night, grid or no grid. 

We also offer the Candle Charger in the Stower P.O.P. Kit! P.O.P = Power Outage Prepared, a necessary update for home readiness. 

Thanks to our amazing community of Kickstarter supporters (thank you! thank you! thank you!), we raised enough money to manufacture and ship our first product, the FlameStower - its now for sale across the US and Canada.

The FlameStower is portable power for campers. Based on your invaluable feedback and our own experiences we needed to design a power generator - elegant and simple - to work inside the home during blackouts.

The Candle Charger fits in existing emergency kits and works readily with common household items: candles and water.

With your help, we want to make the Candle Charger a reality and modernize power outage readiness. We hope you'll join us and Get Charged!

The Candle Charger uses the heat energy from candles to generate electricity. 

Opening the handle
Opening the handle
Locking into place
Locking into place

Bonus! The Candle Charger also quickly boils and sterilizes water, which you can reuse for cooking or making a cup of something nice before the grid returns. We recommend tea, Earl Grey, hot. 

$125 - P.O.P KIT - UNLOCKED!

Most emergency kits are overkill and don't really offer much for the usual 2-3 day power outage. 

So we built a better one! For the first time ever, we're excited to introduce the P.O.P Kit by Stower! P.O.P = Power Outage Prepared!

The P.O.P Kit includes everything needed to operate the Candle Charger and more:

  • A Candle Charger and two 6-hr Stower Candles for charging and boiling water
  • Matches and emergency water pouches
  • Long-burning candles and USB rechargeable flashlights
  • A kickass multitool and basic first aid kit to take care of business
  • Some hand wipes to keep it clean. 

$99 - BUY ONE, GIVE ONE - UNLOCKED!

Stower works with our partner Grupo EBIS in Guatemala to integrate Candle Charger technology into clean, efficient cookstoves - an amazing collaboration for personal, reliable energy!

Guatemala Ecoestufas and Prototypes
Guatemala Ecoestufas and Prototypes

You reserve a Candle Charger at retail price and we'll install one of our chargers into a clean cookstove for a family in Guatemala. Buy one, give one - excited to try this exclusively on Kickstarter and see what we can do!

Stower is a leader in personal energy product engineering and design. Together with our manufacturing partner PCH, Stower makes smart, reliable energy products that 1) do their job and 2) do it well.

The Candle Charger contains two core pieces of technology: 

  • A thermoelectric module, also known as a Peltier cooler. Thermoelectric modules are semiconductor devices that convert temperature gradients – one side hot, one side cold – into electricity. The Candle Charger uses nontoxic bismuth telluride-based modules, which have been in mass production for over twenty years for scientific, refrigeration, and automotive industries. 
  • The Stower smart circuit that conditions the power coming from the module to match power requirements of the device being charged (e.g. a smartphone). 

What makes the Candle Charger an important innovation is the conversion efficiency of the device, its electrical strategy, and the focus on design for indoor use. 

Conversion Efficiency

The Candle Charger achieves class-leading power output from thermoelectric modules, providing reliable USB power over extended periods of operation. We do this through a combination of patented mechanical engineering steps to optimize heat transfer from the candle, to the thermoelectric module, and into the water bath; careful control over thermal interfaces; and spatial design to position the Candle Charger relative to a heat source (i.e. the candle).

Electrical Strategy 

To increase cost savings and overall efficiency, Stower directly charges your electronic devices rather than charge an intermediate battery. We’re able to do this through circuitry developed exclusively for Stower products that

  • continually monitors the power output from the thermoelectric generator,
  • boosts the voltage to USB standard 5V,
  • conditions the power from the generator so it matches internal charging requirements of smartphones, switching between “bands” of acceptable current levels and gradually dropping the voltage so phones don’t drop the charge,
  • provides LED indicator sequences to clearly show power availability – a flashing light means power is available, while a stead light means steady power is achieved and the power output is “iPhone ready.” 

Designed for Indoor Use

We began with energy - the candle - and built the Candle Charger from there. The Candle Charger is sturdy enough to work outdoors, but its sleek design fits in with other beautiful shelf items for in-home storage and use. 

The handle and locking mechanism are necessary features that provide safe interface with the water bath during operation and collapsability for anywhere storage. The all-aluminum exterior - designed for maximum thermal efficiency - lends a modern look while being durable enough to take outdoors.

 Stower's been a hard charging machine since our birth in 2012.

Stower is led by Andy, Adam, and Jason. Andy and Adam met in grad school studying materials science. Both were obsessed with solar technologies and nanomaterials - so much so that Adam once illicitly snuck Andy into the campus nanofab, bunny suits and all, to help characterize sapphire wafers. STOWER GONE WILD!

We're also lucky enough to work with some extremely talented advisors and partners that help make Stower a reality, including:

  • Dr. Reza Kassayan - our world-class electrical engineer and advisor
  • PCH - our supply chain, design, and manufacturing partners
  • REI, Sportsman's Warehouse, FGL Sports in Canada, and other retail partners who've helped deliver our first product nationwide.
  • Stanford, StartX, and Orange Fab - hundreds of folks who support and help us make new energy innovations. 

Stower builds energy products for individuals, making it easier and more efficient to generate and control our own electricity. Smartphones are amazing machines: Stower chargers keep these powered when the grid can't. 

With this technology, Stower is also introducing electricity to thousands of homes in emerging markets. To learn more about our work with clean cookstoves, you can visit the Patents for Humanity website. 

Thank you for visiting our page and checking out what we're up to! Before you leave, please check out our website for more information on us and be sure to pass on the news that now we all have control of our power - with the Candle Charger!

Risks and challenges

We're big on reliability - we've built the Candle Charger to be more dependable than the grid!

From top to bottom, Stower is committed to delivering for you, our early Kickstarter backers, just as we did for our first Kickstarter project. You take a big gamble on new innovations, and we appreciate that. Thank you.

All the pictures on this page are early production units made with Stower's new manufacturing partner, PCH. We're working with PCH and specifically its PCH Access program to make and ship the Stower Candle Charger to you, our backers. For those of you who don't know, PCH designs custom product solutions for the world's best brands from startups to Fortune 500s such as Apple.

Because of this, delivery of the Candle Charger is guaranteed. No questions asked - you will receive your order. And all sales are backed by Stower's 1-year warranty.

Learn about accountability on Kickstarter

Support this project

  1. Select this reward

    Pledge $65 or more About $65

    Candle Charger: Early Bird Special! A Stower Candle Charger with one 6-hour candle. Regular retail price will be $99. Free shipping to USA.

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    Estimated delivery
    Ships to Anywhere in the world
    Limited 713 backers
    $
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  2. Select this reward

    Pledge $75 or more About $75

    Candle Charger: Pre-Order Special! A Stower Candle Charger with one 6-hour candle. Regular retail price will be $99. Free shipping to USA.

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    Estimated delivery
    Ships to Anywhere in the world
    14 backers
    $
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  3. Select this reward

    Pledge $99 or more About $99

    Buy One, Give One: Unlocked! Reserve a Candle Charger at retail price and Stower will work with its partners in Guatemala to integrate Stower charging technology into a clean, efficient cookstove. Get Charged, Give Charge!

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    Ships to Anywhere in the world
    5 backers
    $
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  4. Select this reward

    Pledge $125 or more About $125

    Stower P.O.P Kit: Unlocked! A simple, complete kit to keep you Power Outage Prepared. Includes a Candle Charger, two Stower 6 hour candles, USB flashlights and more. Retails at $170. Free shipping to USA.

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    Ships to Only certain countries
    50 backers
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  5. Select this reward

    Pledge $150 or more About $150

    Stower Bundle: A great deal on the Candle Charger and Stower's original product, the FlameStower, for adventurers everywhere. Retails at $199. Free shipping to USA.

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    Ships to Anywhere in the world
    31 backers
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  6. Select this reward

    Pledge $350 or more About $350

    Candle Charger Family Pack: Be prepared - and keep your friends and family prepared too. Six Candle Chargers each with a 6-hour candle. We can send them all to one address or six addresses of your choice.

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    18 backers
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  7. Select this reward

    Pledge $1,000 or more About $1,000

    Stower Outdoor Challenge: Run, hike, or bike with the founders around San Francisco. You choose the what, we’ll make the course – plus your choice of any other reward!

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    0 backers
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Funding period

- (45 days)