The tender aim is to achieve sustainable and ecological urban transport through purchase of new busses. Currently, electrical vehicles are considered to be "the greenest" on the market. They contribute enormously to the improvement of air quality in urban areas, since their direct harmful emissions are zero.
But their widespread use raises other issues to solve - harmful raw materials used in batteries and negative environmental impact during their extracting and disposal. Some of these issues are solved in electrical vehicles that use super capacitors instead of standard batteries. Super capacitors perform better on both indicators - environmental and sustainability of the investment. They do not contain such harmful materials, chemicals or toxic metals.
Another advantage of super capacitors, compared to batteries, is that the charge is practically not reduced at low temperature, they last longer and the work temperature also has a better performance. This technology is not yet well-known in Bulgaria. It is used in Belgrade, Vienna. Gabrovo team decided that it is too risky to try only the new capacitors technology.
During the market research and market consultations, the potential suppliers convinced the experts from Gabrovo municipality that it is impossible to combine both technologies in one tender. This was the real challenge - HOW to allow both technologies to participate without favouring any of the potential participants because of their battery technology.
