Solar inverter is mainly used to convert DC to AC, the converted AC can be at any required voltage and frequency with the use of appropriate transformerss, switching, and control circuits.
Wellsee solar inverters convert DC power stored in batteries to AC power that can be used as needed. Selecting an inverter for your power system based on the maximum load you will be powering, the maximum surge required, output voltage required, input battery voltage and optional features needed. High quality stand-alone inverters are available in sizes from 100 watts, for powering notebook computers and fax machines from your car, to 500,000 watts, for powering a commercial operation. The size of an inverter is measured by its maximum continuous output in watts. This rating must be larger than the total wattage of all of the AC loads you plan to run at one time. The size of the inverter can be minimized if the number and size of the AC loads is kept under control. Wattage of most AC loads can be determined from a tag or label on the appliance, usually located near where the power cord enters, or from the owner’s manual. If the inverter is expected to run induction motors, like the ones found in automatic washers, dryers, dishwashers and large power tools, it must be designed to surge, or deliver power many times its rating for short periods of time while these motors start.
Normally inverters are available with three basic power output waveforms: square wave, modified square wave (often called modified sine wave) and sine wave. Intertie inverters and utility companies deliver a sine wave. Square wave inverters have the lowest cost and efficiency and are not sold in this catalog. The price of the better quality inverters is low enough to make square wave inverters an unattractive choice.
The modified square wave output with harmonic distortion of around 40%. They are an economical choice in power systems where waveform is not critical. Their high surge capacity allows them to start large motors while their high efficiency makes them economical with power when running small loads like a stereo or a small light. They can power most lighting, televisions, appliances and computers very well. We do not recommend them for computer systems with laser printers.
Unfortunately, this type of inverter may destroy some low cost rechargeable tools and flashlights, and their waveform will not allow many laser printers, copiers, light dimmers and some variable speed tools to operate. Equipment with silicon controlled rectifiers or SCRs will not operate. Some audio equipment will have a background buzz that may be annoying to music connoisseurs.
Sine wave inverters have a slightly higher cost, but they can operate almost anything that can be operated on utility power. Trace Sinewave inverters are available in sizes from 2500 watts to 5500 watts, and a pair of them can be synchronized to deliver up to 11,000 watts. They are an excellent choice for a ‘whole house" inverter. Exeltech sinewave inverters, available in sizes from 150 watts to 5000 watts, are an excellent choice for power systems running audio or telecommunications equipment and other electronics that are waveform-sensitive. Larger Sinewave inverters are available in sizes up to 500,000 watts that can run a small village.
Wellsee solar inverters mainly for two types of inverter based on output wave, modified sine wave inverter and pur sine wave inverter. The output of a modified sine wave inverter is similar to a square wave, output except that the output goes to zero volts for a time before switching positive or negative. It is simple and low cost and is compatible with most electronic devices, except for sensitive or specialized equipment, for example certain laser printers.
A pure sine wave inverter produces a nearly perfect sine wave output (<3% total harmonic distortion) that is essentially the same as utility-supplied grid power. Thus it is compatible with all AC electronic devices. This is the type used in grid-tie inverters. Its design is more complex, and costs more, the electrical inverter is a high-power electronic oscillator. It is so named because early mechanical AC to DC converters were made to work in reverse, and thus were "inverted", to convert DC to AC.
Wellsee solar inverter is from 120W to 6KW, 120W,150W,180W,200W small inverters used for home, and 1000W-6000W used for big sensitive power, which is more stable. Both performs the conversion of the variable DC output of the PV cells into a clean sinusoidal 50- or 60Hz current.
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