Operation on propane, butane, natural gas. Variable resistor to control current output. Optional split current package, which allows one generator to supply two cathodic loads. The true cost of a cathodic protection system includes not only the initial purchase and installation costs, but also the cost of supervising and operating the system, and the periodic replacement of failed or consumed components, such as anodes and batteries. No supervision is required, and the preventive maintenance intervals can be up to one year.
Fuel consumption is minimal.
Operating and maintenance instruction manuals. Perhaps most importantly, there is no need for batteries. TEGs operate continuously, and are equipped to re-ignite automatically in the event of fuel interruption. No backup or reserve is required. Battery dependent systems can be effective, of course, but the cost implications of purchasing, sheltering, and periodically replacing batteries should be a part of any alternative power study.