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Solar Inverter and Solar Charge Controller

Author: Source: Datetime: 2016-09-27 11:48:24

Inverter in portable solar power generator


In short, the inverter is a low voltage (12 or 24 volts or 48 volts) of DC into 220 volts of electronic equipment. Because we usually 220V AC rectifier into DC to use, and the role of the inverter and the contrary, hence the name. We are in a "mobile" era, mobile office, mobile communications, mobile entertainment and entertainment. In the mobile state, people not only need the battery or battery supply of low-voltage direct current, but also need us in the daily environment indispensable 220-volt AC, the inverter can meet our needs.

 inverter3

Inverter can DC power (battery, battery) into alternating current (usually 220V, 50Hz sine wave). It consists of inverter bridge, control logic and filter circuit. Widely used in air conditioning, home theater, electric wheel, power tools, sewing machines, DVD, VCD, computers, television, washing machines, range hoods, refrigerators, video recorders, massagers, fans, lighting and so on. In foreign countries because of the high penetration of the car to go out to work or travel can be used to connect the inverter battery charger and a variety of electrical tools to work.


The car inverter output through the cigarette lighter is 20W, 40W, 80W, 120W to 150W power specifications. And then a large number of power inverter power through the cable connected to the battery. By connecting the appliance to the output of the power converter, various appliances can be used in the automobile.


You can use the electrical appliances are: mobile phones, notebook computers, digital cameras, cameras, lights, electric shavers, CD players, games, handheld computers, power tools, car refrigerator and a variety of tourism, camping, medical emergency electrical Wait. At present in the field of solar energy, the inverter has also been fully applied.


Inverter mainly by sine wave classification, mainly divided into two categories, one is a sine wave inverter, the other is a square wave inverter. Sine-wave inverter output is the same as our daily use of the grid even better sine wave AC, because it does not exist in the electromagnetic pollution in the power grid. Square wave inverter output is the poor quality of the square wave AC, the positive maximum to negative maximum at the same time, so that the load and the inverter itself caused severe instability.


At the same time, its load capacity is poor, only the rated load of 40-60%, not with inductive load. If the load is too large, the third harmonic component contained in the square wave current will increase the capacitive current flowing into the load and seriously damage the power supply filter capacitor of the load. In view of the above shortcomings, a quasi-sine wave (or modified sine wave, modified sine wave, analog sine wave, etc.) inverter, the output waveform from the maximum to negative maximum value between a time interval. The use of the effect has improved, but the quasi-sine wave waveform is still composed of broken lines, are square wave areas, continuity is not good.


In summary, sine wave inverters provide high-quality AC power that can drive any kind of load, but both the technical requirements and the cost are high. Quasi-sine wave inverter to meet most of our electricity needs, high efficiency, low noise, affordable, and thus become the mainstream products in the market. Square-wave inverter production using simple multivibrator, the technology belongs to the level of the 50's, will gradually withdraw from the market.


Inverter according to the power of different, but also can be divided into coal-fired power inverter, solar inverter, wind inverter, nuclear inverter. According to the use of different, divided into independent control inverter, and grid inverter. The world's solar inverter, Europe and the United States more efficient, the European standard is 97.2%, but the price is more expensive, the other domestic inverter efficiency in 90%, but the price is much cheaper than imports.


In addition to power, waveform, the choice of inverter efficiency is also very important, the higher the efficiency of the inverter in the waste of electrical energy on less, for electrical energy is more, especially when you use low-power system The importance of the point is more obvious.


The inverter itself consumes part of its power at work, so its input power is greater than its output power. Inverter efficiency is the inverter output power and input power ratio, the inverter efficiency is the output power than the input power. If an inverter inputs 100 watts of DC power and outputs 90 watts of AC power, its efficiency is 90%.


Solar charge controller in solar powered portable generator


Solar charge controller is actually a steward of solar energy and battery, in the non-inverter system, he can directly access the DC load.

 solar_charge_controller

Its biggest role is based on the battery voltage level, adjust the charge current size, and decide whether to load the power supply to achieve the following objectives:


1. Always keep the battery in full. 2. To prevent excessive battery charging. 3. To prevent excessive battery discharge. 4. To prevent the night battery reverse to the solar panel charging.

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