BUT look at estimated price
The cost is quoted in $/kWh or $/MWh since the VRB is an "Energy Storage System" and should not be considered a UPS or even a generator. Although the VRB provides the full UPS capability, its primary use is for energy storage for long periods, which UPS and conventional technologies cannot provide. As an approximate cost, systems are priced between $350-$600 per kWh, sizes ranging from a few hundred kW's to MW size systems. As the size of the system in kWh increases, the cost per unit decreases significantly. For example, a system rated at 100MWh would have an installed cost of about $325 per kWh. The incremental cost of storage for large systems is approximately $150 per kWh.
Same article stated several companies are working on commercial projects.
VRB Power Systems Inc. of Vancouver, B.C. Canada is an electrochemical energy storage company that is commercializing the patented Vanadium Redox Battery Energy Storage System ("VRB-ESS") and has acquired the intellectual property rights and assets to the Regenesys Energy Storage System. In May 2005, VRB Power acquired a world-wide license to SEI's patents and technology (excluding Japan).
VRB Power Systems. electric storage systems (VRB-ESS) are intended for applications from 2.5kW's to 10MW's with durations of 2 hours and greater. VRB's vanadium products are aimed at two markets:
The VRB-ESS is sized for telecom applications (2.5kW's to 10kW's - multiple hours) intended to replace lead acid battery backup systems.
The VRB-ESS is designed for Utility and Remote Area Power Supply systems (less than 25kW's - multiple hours).
Cellennium Company Limited- A team of European scientists created a novel design architecture of the vanadium battery. This design is said to allow economical production for vanadium batteries in modular sizes as small as 3 to 5 kilowatts, thus potentially enabling wide spread use of energy storage for small, distributed applications. The technology of the new vanadium batteries is easily scalable to megawatt sizes.
This novel technology is now owned by Squirrel Holdings Limited; Cellennium Company Limited has acquired from Squirrel the rights of the use and development of the new vanadium batteries in Thailand. The Cellennium Company Limited has recently launched a program to commercialize these batteries. The new vanadium batteries are working successfully in the laboratory, and are giving excellent results. The unique features developed by Squirrel Holdings Limited are as follows:
The electrolytes are fed through a stack of cells in series instead of in parallel as in other designs.
The cells in a stack consist of pairs of high precision molded structural components designed for speedy "LEGO style" error free assembly with o-ring sealing to prevent leaks.
The electrodes, sandwiched between novel glassy carbon bipolar plates and the cell membranes, consist of carbon fiber mats permeated by a system of fine channels to distribute the electrolyte through the whole area with very small flow resistance.
The cells are placed horizontally in a vertical stack to make a compact and structurally stable unit.
A novel hydraulic feature within the system allows the battery to be "black started'' from a state of total inactivity without the need for priming of the electrolytes from outside sources.
Production of the electrolytes can be done modularly and electrochemically, operating at room temperature, without the addition of chemicals.
Sumitomo Electric Industries, Ltd. (SEI) has been involved in the development of redox flow cells since 1985 in collaboration with Kansai Electric Power. They have successfully built demonstration scale units for grid load leveling applications and have been building and installing commercial scale units in Japan since 2001.
SEI has 16 operational VRB systems in Japan, which include peak shaving, utility and renewable energy storage applications, and has developed a 42-kW cell stack. A 3 MW x 1.5 sec. plus a 1.5 MW x 1 hr system for Tottori Sanyo Electric has been operating since 2001 at a large liquid crystal manufacturing plant as a combination of UPS for voltage sag compensation and a peak shaver to reduce peak load.
The VRB-ESS installation for PacifiCorp in Castle Valley, Utah, was the first large-scale commercial VRB-ESS in North America. The 250kW X 8 hour (2 MWh) unit which is connected to an 209 mile 25kV rural feeder, is being used as a load leveling (peak shaving) device to supply peak power capacity to a remote location in southeast Utah. The VRB-ESS enables PacifiCorp to assure the energy supply, while deferring the need for a new sub-station. The system includes innovative control interface applications and provides considerable impact on local voltage and power factor control. The installation site is in an environmentally sensitive area of national parks in southern Utah, and the VRB-ESS is unobtrusive and flexible.
The VRB-ESS installation for Hydro Tasmania on King Island in Australia was completed in November 2003. King Island is a small remote location off the south coast of Australia that supports and operates 5 wind turbines ranging from 250 - 850kW and Four Diesel generators at 1.5MW each that act as a remote grid to supply power to the local residents. The 200 kW x 4-hour (800 kWh) VRB-ESS installation has been integrated with the wind turbines and diesel generators to form a 3-way hybrid system that improves power supply and quality to the community of King Island. The VRB-ESS is used to smooth the short term output variations in the wind generators and the customer loads while providing frequency and voltage control.
VRB Power Systems announced that it has sold a 30kW x 2 hour VRB-ESS to the South Carolina Air National Guard. The VRB-ESS will provide power quality enhancement and back-up energy supply for a tactical radar system in the event of grid disruption. The VRB-ESS system will improve energy efficiencies and economics by supplying backup power for 2 hours versus 10 minutes currently provided by a UPS system. Additionally, the VRB system has an expected 10 year (or greater) system life and the flexibility to add hours of power supply by simply increasing the volume of electrolyte.
VRB Power Systems Incorporated, Vancouver, B.C., Canada
Cellennium (Thailand) Company Limited, Bangkok, Thailand
Sumitomo Electric Industries, Ltd., Osaka, Japan (no information available on website)
V-Fuel Pty Ltd, Sydney, Australia (vanadium bromide battery)