AC or DC

First, letís start with the terminology - AC refers to alternating current, While DC refers to Direct Current.

In the context of home power systems, the term "AC" generally refers to 120 or 240 volt alternating current of the type normally found in homes and industry. This form of electricity has the advantage of being efficient to distribute over long distances (via powerlines) and is easily converted to whatever voltage is required for any particular device through the use of transformers. This conversion process is probably familiar to you in the form of plug in adapters (wall cubes) used to power electronic equipment such as answering machines, cordless phones, etc. Many other electronic devices have transformers enclosed within their cases to perform this function.

DC, in the context of home power systems, generally refers to low voltage direct current as stored in the batteries of the system. Thus, in a DC system, electricity is fed directly from the batteries to the loads in the system. Most DC only systems are 12 volts because of the wide availability of 12volt equipment.

Advantages associated with AC:


Advantages associated with DC:



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