All generators (except the basic generator) can be upgraded to produce steam by adding a steam boiler addon. When added, the machine will no longer directly produce RF. Instead, it will produce steam at a rate of 2:1. To produce steam, water will be consumed. Water and steam can be pumped in and out directly from the addon, but not the machine itself.
To utilize the steam, a steam engine can be used to produce RF from it. It takes steam as input and outputs water. However, during the process, around 20% of the water will be lost, so a steady supply of water is needed for the generators.
Heads up!
Steam engines will not work if their water or energy storage is completely full. Always ensure that the water can go somewhere. With some tanks, comparators and redstone you can probably build a self-sustaining loop.
Multiple steam engines can be chained together. They'll share the energy storage, water, and steam tank from the first engine in line, working cooperatively. A steam engine's speed varies based on the stored steam. More steam results in more pressure, making it operate faster. The speed is scaled linearly based on the steam tank's fill percentage, with a maximum multiplier of 10 when the tank is full.
However, the efficiency of the engine varies based on the speed. Higher efficiency results in more RF per steam unit produced. The machine's efficiency is highest when operating at around 700% speed. Anything lower or higher than that will result in a less ideal yield. Energy will be output from the red machine slots. Fluid ports are marked blue.