Thanks to the work of our predecessors who oversaw this project in the previous year, our team benefitted from a substantial amount of research into the considerations of storing energy in various forms. In deliberating, major factors to consider were: cost, ease of assembly, required maintenance, and safety. The unit had to be cheap enough that rickshaw pullers could quickly see a return on there investment, whilst also being robust enough to survive the jolty journeys. If all did fail, and the stored energy were to abruptly be released, the risk of causing injuries had to also be sufficiently low. After considering these and many other factors, compressed air arose as the most viable method of storing energy.
Due to their abundant availability and next to nothing cost, carbonated drink bottles were chosen to act as the storage device for the compressed air. Extensive testing was performed on a variety of bottle types to determine their practicality and effectiveness. These test resulted positively even when samples were extended to used, discarded and slightly deteriorated bottles to evaluate the solutions potential for promoting the reuse of waste.