Inverters are the essential step between a battery's DC power and the AC power needed by standard household electrical systems. In a grid connected home, an inverter connected to a battery bank can provide an uninterruptible source of backup power in the event of power failures, or can be used to sell extra alternative energy power back to the utility company.
A "DC to AC" power inverter, also termed DC to AC converter, electronically converts DC power from a battery to 60 hertz AC power at 120 volts like in homes. Batteries produce power in direct current (DC) form, which run at very low voltages but cannot be used to run most modern household appliances. Inverters take the DC power supplied by a storage battery bank and electronically convert it to AC power. An inverter used for backup power in a grid connected home will use grid power to keep the batteries charged, and when grid power fails, it will switch to drawing power from the batteries and supplying it to the building electrical system.
Most modern inverters also include over voltage and under voltage protection, protecting sensitive equipment from dangerous power surges as well. All the DC to AC power inverters requires a 12-volt input, but there is a wide range of models available in the market depending on the output wattage that they supply. A few of the most widely used models are 150 watts, 325 watts, 600 watts, 1500 watts and 3000 watts. The lower wattage, models can be directly connected to a cars cigarette lighter socket, while the larger ones must be directly wired to bigger batteries.
Typical applications for a DC-AC power inverter include microwave ovens, televisions, video recorders, computer and power tools and monitoring/communications equipment.
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