Highly Efficient Electromechanical Energy Storage


The Flywheel Energy Storage System (FESS) is a new technology for high-efficiency energy storage of 5.8kWh. The FESS will effectively unleash the potential of renewable energy and transportation markets, quickly accepting intermittent energy for later use. It will also store the energy needed to power homes and businesses when electricity demands are at the minimum, cutting the peak demand for electricity. Safe and clean energy storage has major implications for a wide customer base and the product is strategically designed to meet the needs of both commercial and personal users.


The FESS technology uses electromechanical techniques - not chemistry - to store energy and apply it very efficiently and quickly when the demand is present.

Chemical batteries, currently considered the “state of the art” for hybrid vehicles and so-called “plug-in electric cars” are characterized by vast inefficiencies and short life cycles.. These batteries also have slow energy acceptance, safety risks and prohibitive cost, thus limiting their market capability.

The development of the FESS is being accomplished under a technology development program that will result in a low-cost and high efficiency solution, allowing for storage of almost six kilowatt hours (5.8kWh) of electricity to be used at the exact moment of necessity as dictated by the consumer.

The target retail price of the FESS is $150-250 per kWh, compared to $1000 per kWh for leading lithium-ion battery providers. The product will be optimized for charge times of 40 seconds or less for integration into the transportation market, with efficiency exceeding 90%. Drawdown times for the FESS will be approximately 12 hours, compared to months for chemical batteries.

The Finite Element Analysis and extensive simulation that has been completed shows significant potential for the FESS to meet target cost, weight and efficiency objectives. We are currently optimizing materials and fabricating rotors for testing.

While billions of dollars are being spent to improve battery chemistry, we not aware of any other efforts to produce a cost-effective electromechanical battery. This unique, enabling technology and clear development and deployment strategy make the FESS a true revolution. As this product represents a technology platform that can serve many large, growing markets, sales may be accelerated with additional investment.