Abstract: Diesel only propulsion system for transportation system in navigation route caused the river pollution. The green house gas emission and pollution to environment will occur seriously. Beside, the fuel price is gradually increased from year by year; it is importance to replace the diesel only propulsion system for boat. Solar energy is one of the most importance energy resource which abundance in most parts of the world. Photovoltaic (PV) system with energy storage is one of the replacement propulsion systems for boat. The photovoltaic (PV) generation system, the diesel generator and the energy storage system in a hybrid power supply system for boat that minimizes the fuel cost and the CO2 emissions.