A NSW Rural Fire Service (RFS) volunteer has been charged after an investigation into a spate of fires on the state's far south coast.

Key points: A 19-year-old is accused of lighting several blazes in the Bega Valley

A 19-year-old is accused of lighting several blazes in the Bega Valley He has been granted bail but ordered to seek psychological treatment

He has been granted bail but ordered to seek psychological treatment The RFS said the man had been stood down in the wake of the allegations

Blake William Banner appeared in Bega Local Court today charged with seven counts of intentionally causing a fire.

Police said in a statement that the 19-year-old allegedly lit seven fires in the Bega Valley between October 17 and November 26.

Mr Banner was arrested last night at a fire shed in Tarraganda, east of Bega, and his vehicle was seized for forensic examination.

In the statement, police alleged they saw him sitting in a ute next to the Bega River earlier in the day.

Officers claimed they noticed trees and grass in the area were on fire a short time later.

In the statement, police alleged Mr Banner lit the fire and left the area, and then returned to fight the blaze in his role as a volunteer firefighter.

'Incredibly dangerous'

Today, the court heard Mr Banner was of good character and had no history of violence.

Magistrate Doug Dick said the offences were "clearly serious" and that it was an "incredibly dangerous time in our environment".

Mr Banner was granted conditional bail and is due to return to the Bega Local Court on December 17.

In a media release, the RFS confirmed it had stood down Mr Banner as a volunteer in the wake of the allegations.

"Over the past few weeks, we've seen firefighters going above and beyond in difficult and dangerous conditions," Commissioner Shane Fitzsimmons said.

"Our members will be rightly angry that the alleged actions of one individual can tarnish the reputation and hard work of so many.

"This type of alleged behaviour is the ultimate betrayal of our own members and of the broader community."