A wood-fired generator is a power source that runs by burning wood as fuel. Holds up to 75 wood max, and will provide power for roughly 3 days and 9 hours before running out. It can be constructed after researching Electricity. It also produces a slight amount of heat as secondary effect but not enough to classify as temperature control element. Power production is constant so long as they do not run out of fuel which greatly reduces your base's need for batteries, but will eat into your wood reserves over time, and will add additional workload for your haulers to take care of. If you are playing on a map with ample trees and wish to avoid dealing with weather's impact on your power supply, wood-fired generators are a reasonable solution.
Prior to Beta 18, wood-fired generators were known as fueled generators, but were otherwise identical.