The wind stops.
The sun sets.
The tide goes in and out.

Modular ocean-current power for coastal communities, businesses, and remote operations.

WHAT WE'RE BUILDING

Think of it as a modular underwater wind turbine.

The principle is the same. A rotor in the flow spins and makes electricity. The machine looks different because water is different from air, just as fish are different from birds.

THE RESOURCE : TIDAL CURRENTS

Concentrated power where ocean meets land.

As tides rise and fall, water rushes in and out of the entrances to bays and fjords. When large tides meet narrow inlets, like in the fjords of Southeast Alaska, this creates tidal currents: ocean rivers driven by the moon, flowing in both directions every day and predictable years in advance.

210 TWh/year

Alaska's estimated technical tidal energy resource
DESIGNED TO SCALE

One machine is only the beginning.

Sitkana's technology is designed as a modular system. Individual generators can work together, allowing power production to grow with the needs of a customer.

Add machines. Add power.

ORIGINS

Built from a life on the water.

Sitkana began in Alaska with a simple idea: build marine energy systems around the realities of working on the water. Inspired by fishing gear and the natural forms of seashells, early prototypes evolved year by year into the technology we have today.

2021

First small-scale prototypes tested in a river.

2023

Built Chinook V1. Rotor tested by the University of Washington.

2024

Built Chinook V2. Improved weight distribution, reduced size, improved 3D print quality.

2025

Built Chinook V3. Improved underwater sealing, buoyancy, and drivetrain.

2026

Chinook V4 generated, controlled, and stored power from an ocean current.

MISSION

Move coastal power beyond diesel.

Many coastal communities and remote operations still depend on diesel for electricity. Sitkana's mission is to turn the tidal currents already moving past these places into a local source of predictable power.

ABOUT THE FOUNDER

From the water to engineering, and back again.

I started my career as a commercial fishing deckhand in Southeast Alaska while studying marine biology. A summer on the water led me to mechanical engineering and an interest in generating electricity from ocean currents.

To understand renewable energy operations, I joined NextEra Energy, where I optimized daily maintenance schedules for one of the world's largest renewable energy fleets. My six-person team identified $21 million in savings in our first year.

That experience brought me back to Alaska, where I founded Sitkana to build marine energy systems around how they're actually deployed, operated, and maintained. Outside of Sitkana, I am a large format film photographer. I am usually in the forest with my wife Julia and daughter Maya, or home with our two cats.

LANCE MCMULLAN
Founder & CEO
BUILT WITH SUPPORT

It takes a team to build in the ocean.

Sitkana's development has been supported by research institutions, federal programs, accelerators, and organizations advancing research, commercialization, and innovation in Alaska.

LATEST FROM SITKANA

Field notes & company updates.

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