RIO DE JANEIRO, April 2 (Reuters) - Transpetro, the logistics arm of Brazil's state-run oil firm Petrobras is analyzing projects to supply all its 48 terminals with renewable energy, the subsidiary's director of ducts and terminals Marcio Guimaraes said, ahead of the inauguration of a solar plant in Sao Paulo state on Tuesday.

The plant, set to be operated by Transpetro, will supply enough energy to Brazil's national grid to account for all operations at Transpetro's terminal in Guarulhos International Airport, said Guimaraes.

"We don't want just one to use as an example," Guimaraes told Reuters during a phone interview. "We do have solutions being analyzed, being studied, for each of our units."

Petrobras has put a big bet on renewables as part of its plan to shift from an oil company to an energy firm, in line with President Luiz Inacio Lula da Silva's wish to kickstart Brazil's energy transition.

Transpetro invested 12 million reais ($2.37 million) in the Guarulhos project, and this year is set to start another one in the firm's Coari Waterway Terminal, in Amazonas state, to be completed sometime next year.

Coari ships oil from Petrobras' Urucu onshore oil and gas cluster in Amazonas. At Coari the firm is set to use solar and hydro power generation supported by the use of batteries, the executive said.

Guimaraes did not give out a timeline for renewable solutions in other terminals.

($1 = 5.0574 reais) (Reporting by Fabio Teixeira; Editing by Stephen Coates)