The task of bus stop passenger information system with an autonomous
power supply is to provide passengers with complete information at bus stops,
making travelling easier and more efficient.
The aim of this solution was to provide all the functions
of Real Time Passenger Information System without using a power from grid.
Solar powered RTPI display provides the passengers with
a full range of information using only renewable energy.
The system was specially developed so it could
be autonomously supplied for 48 hours in case of insufficient
solar energy. When the system was developed and its components were selected,
a minimal energy use was the priority.
The selection, development and structure of all solutions,
from electronic parts through display elements (LED and TFT and E-Ink displays),
to software, were to meet the requirement of high-energy efficiency.