The biggest problem today is the use of batteries in critical back up power solution. This could be a telecom site, data center, or other mission critical application.

The most common used batteries in the UPS business have historically been lead-acids. These batteries come in either a flooded or valve regulated (VRLA). Both types suffer from some major problems. On the flooded side there is the issue of spill containment and cooling, along with regular maintenance.

For the VRLA the major issue has been life. VRLA batteries have not exhibited the life they promised, with typical battery life being much shorter than the advertised 10 years. Manufacturers of VRLA batteries say the reason for such short life is the way batteries are being used. At temperatures greater than 25°C battery life degrades, and with the increased number of telecom sites having unregulated environments, VRLA users are experiencing battery life times of three to eight years.

Telecom companies and others requiring a high reliability back up solution are left with some major decisions. Do they continue to use lead acid batteries with all their down falls or look at new technologies?

Ultracapacitors and fuel cells offer a unique, highly reliable, long-lasting solution that offer a low lifetime cost. The fuel cells are used for the long term energy storage with the ultracapacitors used to bridge the power. Since the by product of running fuel cells is water and ultracapacitors do not posses any environmentally hazardous material, this solution is very green and environmental friendly.