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What does a power inverter do and what kind of that i can choose?

A power inverter changes DC power from a battery into conventional AC power that you can use to operate all kinds of devices ... electric lights, kitchen appliances, microwaves, power tools, TVs, radios, computers, to name just a few. You just connect the inverter to a battery, and plug your AC devices into the inverter ... and you've got portable power ... whenever and wherever you need it.

The inverter draws its power from a 12 Volt battery(preferably deep-cycle lead acid), or several batteries wired in parallel; if the inverter DC input is 24Volt or 48Volt, you need to connect 2PCS 12V or 4PCS 12V in series.

The battery will need to be recharged as the power is drawn out of it by the inverter to power the loads. The battery can be recharged by running the automobile motor, or a gas generator, solar panels, or wind. Or you can use a battery charger plugged into an AC outlet to recharge the battery.
Or you can choose the inverter charger models, there already have a battery charger built-in the inverter, the battery wil be charged by the ac grid power at the same time when the inverter working(power the loads).

If you system is a off grid solar system, you can take the solar inverter with solar charge controller, then you just need to take solar panels and battery connect. view our solar inverter with solar charge controller.

How can i choose a suitable inverter and watts?

Among all your appliances(loads) at your home, there are some kinds of loads are belongs to inductive, these kinds of loads need a few times of initial surge of power than its rating power to start, this is called ("starting load" or "peak load"). Once started, the tool or appliance requires less power to continue to operate ("continuous load")

Following is some of common loads information for your reference:

General Safety Precautions and Installation Tips for using a inverter:

1. Place the inverter on a reasonably flat surface, either horizontally or vertically.
The inverter should not be installed in the engine compartment, due to possible water/oil/acid contamination, and excessive heat under the hood, as well as potential danger from gasoline fumes and the spark that an inverter can occasionally produce. It's best to run battery cables to a dry, cool inverter mounting location.
Keep the inverter dry. Do not expose it to rain or moisture. DO NOT operate the inverter if you, the inverter, the device being operated, or any other surfaces that may come in contact with any power source are wet. Water and many other liquids can conduct electricity which may lead to serious injury or death.
Avoid placing the inverter on or near heating vents, radiators or other sources of heat. Do not place the inverter in direct sunlight. Ideal air temperature is between 50° and 80° F.
In order to properly disperse heat generated while the inverter is in operation, keep it well ventilated. While in use, maintain several inches of clearance around the top and sides of the inverter.
Do not use the inverter near flammable materials. Do not place the inverter in areas such as battery compartments where fumes or gases may accumulate.