From their website
Studies show that hydrogen is as safe as any fuel. In many circumstances, hydrogen is safer than gasoline as a fuel for passenger cars because it is lighter than air and dissipates very quickly. Installing a hydrogen system in your home would be similar to having natural gas appliances.
In more than 50 years of operation Stuart Energy has demonstrated an exemplary safety record. In addition, the Company is actively involved in the development of national and international standards for hydrogen systems and related technologies through its participation on international committees such as ISO TC 197 (Hydrogen) and IEC TC 105 (Fuel Cells).
To date, some of Stuart Energy's systems have obtained Special Acceptance from CSA International and UL (Underwriters Laboratories Inc.) of Canada. In addition, the fuel appliances meet numerous code requirements for gaseous hydrogen and electrical systems. Some of the Company’s meteorological units meet stringent US military standards. The company is now pursuing international certification of its products including UL and CE (Conformité Européene) Marking.
How much will Hydrogen fuel cost?
Stuart Energy’s current cost target is US$2.50 per kg of hydrogen, a benchmark set by the US Department of Energy. On a heating value basis, a kilogram of hydrogen is approximately equivalent to a US gallon of gasoline. Since fuel cell vehicles are expected to be two to three times more efficient than those equipped with internal combustion engines, this cost is equivalent to a gasoline cost of US$1 per gallon for an equivalent range.
How much water is used to make Hydrogen?
Electrolysis does not require significant amounts of water. The hydrogen extracted from a gallon of water using a Stuart Energy fuel appliance could drive a hydrogen fuel cell vehicle as far as gasoline vehicles travel today on a gallon of gasoline.
What is the efficiency of Stuart Energy's systems?
The efficiency of Stuart Energy’s cell stack is up to 90%, based on Higher Heating Values. Including hydrogen compression and other external losses, the system can achieve up to 85% efficiency on a Higher Heating Value basis.
Hydrogen from electrolysis is economically efficient today. Stuart Energy’s systems can boost the value of excess, non-peak electricity by storing it in the form of useable hydrogen. These systems permit a widely distributed, low cost, low risk and economically efficient solution for a hydrogen-fueling infrastructure. With deregulation of the electricity markets and decreasing capital costs of Stuart Energy’s equipment, this solution will continue to become more economical. Electrolysis solutions add further value through a reduction in the external costs of pollution.
How will hydrogen from electrolysis help the environment?
Significant health costs are associated with air pollution from transportation. Regardless of the source of electricity, Stuart Energy’s solution can help to remove air pollution from the streets and centralize it where it can be significantly reduced.
The ultimate solution to the global air pollution problem is the zero-emissions pathway that begins with renewable and sustainable energy. By storing energy, electrolysis solutions can enable renewable power with improved power quality and operating economics. Renewable energy is no longer a dream - wind power generation is growing rapidly and can produce electricity at four US cents per kilowatt-hour. By the time hydrogen cars are produced in large quantities, the electrical grid will likely be greener and total emissions significantly reduced.