High-efficiency DC to DC converters are operating bi-directional in this way they can be used to increase or decrease the output voltage on the load side. They are used to operate 12-volt loads on a 24- or 48-volt battery system or to run a 24-volt RV refrigerator on a 48-volt battery system. The units come with own internal fuse and does not require external fusing other than a fuse the user may wish to put in to protect the equipment. The external fusing can be done using an ATC fuse (automotive tab style) used for the 12 and 24 V rated systems or a Bussman GMT fuse for 48 volt rated systems. 

Diversion loads are low-voltage water heating elements usede for wind or hydroelectric systems. Use one or more of these heating elements with a charge controller designed for load diversion, such as Xantrex C-40 or C-60, or Morningstar TS-45 or TS-60 to turn your excess power into hot water or hot air. They can be used in 12-, 24 and 48-volt diversion regulated systems. 

We can use an autotransformer as a step-down voltage to connect the 240V output of a generator to the 120V input on an inverter. This allows full output power of a 240V generator to be used for battery charging. Autotransformers can step-up voltage to operate 240V appliances and motors from the 120V output of an inverter. IN the same time they can be used for step-up, step-down, generator and split phase output balancing or as a series stacked inverter to load balancing auto-former.

DC/DC Auto Transformers are designed to decrease the DC voltage fed into the unit. Theses isolated, enclosed DC-DC converters are designed to increase, or decrease, the DC voltage fed to the unit.  Functioning as solid state converters they have a high efficiency and provide regulated 13.8 VDC output from an input of 20 -30 VDC.  We use them to power 12-volt lights or appliances using a 24-volt system. For example the 12 / 24 V model will produce 12 V from 24 V AND can be connected backwards to produce 24 V from a 12 V source. Handy for driving a 24 V pump from a 12 V power source.