Spanish to English Tech/Engineering Other

Hello. This refers to the time a pellet or multi-fuel stove or boiler can go without refuelling. It's the same sense as "range", but to me that refers to distance, not time (such as the distance an aircraft can travel on one fuel tank), and a stove is stationary.

e.g.

Tolva de gran capacidad:
200l que aumenta la autonomía

10-43 horas de autonomía continuada con una carga

There are lots of examples of "autonomy" online but they are all on Spanish and Italian websites.

Thanks for your help
Simon