Solar inverters and their integration into photovoltaic panel systems
We all know that it is possible to convert solar energy into electrical energy by using solar cells grouped into solar panels which They produce continuous electricity, the same that we have to convert to alternating current if we want to use it for domestic or industrial use.
Solar inverters do just that, they convert direct current into alternating current, for domestic or industrial use.
How many solar inverters do I need for my house?
When you have already calculated the power in watts that must be converted, which represents the total produced by the solar panels installed, only the number of watts obtained is divided among all the solar panels for the maximum power that the inverter supports, example:
913 watts / 250 w (per inverter) = 3.62. This is 4 solar inverters of 250 watts or
913 watts / 600 w (per inverter) = 1.52. This is 2 solar inverters of 600 watts
Operation and specifications per solar inverter
These solar inverters can be connected directly to the home power line (CFE). The inverter monitors the volume, frequency and phase of the home line and then produces a pure sine wave whose frequency and phase equals that of the CFE but with greater volume. The inverter will supply power to the CFE line when it is turned on.
When solar panels are connected to this type of inverter, your home electricity meter will slow down (if you are using any electrical device), or turn in the opposite direction (if you are not using electrical devices).
These inverters use solar panels connected in parallel, thus maximizing the direct current output of the solar power system. If a solar panel is defective or does not receive sunlight, the direct current output will only be affected to a minimum, the opposite being the case when the solar panels are connected in series.
Solar inverter of 250 Watts of connection to the home electrical network.
1. This CFE tie-in solar inverter is specially designed for solar and wind power systems.
2. The solar panels can be directly connected to the existing CFE line through this inverter.
3. Easy installation. Only solar panels and inverter are needed which connects directly to the CFE line.
Note: This inverter can only be connected to the CFE line and should not be connected to any battery. The solar inverter has the MPPT (Maximum Power Point Tracking) feature allowing each solar panel or wind turbine to work at its optimal output.
|AC power output||200W|
|Maximum Power AC Output||250W|
AC output voltage range
|Switch in 230V position||190V ~ 250V|
|Switch in 115V position||90V ~ 130V|
|AC output frequency range||46Hz ~ 65Hz|
|Total Harmonic Distortion (THD)||<5%|
|Input DC Voltage Range||14V ~ 28V|
|Inverter Peak Efficiency||92%|
|Output waveform||Pure Sine-wave|
|Over voltage protection||Yes|
|Reverse polarity protection||Yes|
|Operating temperature range||-10C ~ 45C|
|Dimension||220mm * 170mm * 60mm|
Includes AC power cord.
1. Connect the DC cables from the solar panels or wind generator to the inverter, making sure the polarity is correct. The recommended cable for maximum output is 8AWG or cables that can carry more than 30 amps. The optimum length of the cable should be less than 8 meters. Longer cables experience significant voltage drops. The power output range of solar panels or wind turbine is 20w – 250w.
2. Set the voltage switch of the inverter to the correct position (115V or 230V) according to the voltage of the home power line.
3. Plug the AC power cord into the inverter and plug into the wall outlet.
4. The 3 green LED indicators will start blinking from left to right when power line and DC line current is detected. This indicates that the inverter is working normally. The flashing speed will be according to the power received from the solar panels. If no alternating current is detected on the CFE line then the red light will come on and the inverter will not transmit power to the home power line. This is called “island protection”
The photovoltaic panels must be installed in a suitable place where sunlight can irradiate them. Connect the cables of the solar panels (parallel connection) to a junction box and from this box take out a single cable that reaches the terminals of the solar inverter. Connect the inverter to the electrical socket inside the house. After these actions are done, when the solar panels receive direct sunlight, the photovoltaic system will convert the solar energy into usable electrical energy in the house.
This solar power system is scalable and each system is independent. The total power of the system will be the sum of all the photovoltaic systems installed. The installation of each system is identical.
Note: Do not attempt to connect more than one inverter to a single DC cable that exceeds 250 watts. If you require your solar power system to have an output greater than 250w, you can add more stand-alone 250w systems to your grid or consider using a higher capacity inverter such as the one specified below.
600W Solar Inverter for home electrical grid connection.
For solar panels or wind generator.
|Output Waveform||PURE SINE WAVE|
|DC input voltage||DC 14Volt – 28Volt (solar panel)|
|AC Voltage Output||AC 110v|
|Temperature protection||55C ± 5|
|Net weight||3.0 kg|
Includes AC power cord.