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ABOUT SOLAR ENERGY

Solar PhotoVoltaic (PV) power

A solar PV system is based on the conversion of sunlight into electricity, using the photovoltaic (PV) effect. Mono-Si PV cells are usually size 156*156 mm semiconductor wafers of doped crystalline silicon that convert light into electric current at a voltage of up to 0.6 Volts. 60 or 72 cells are assembled between two strong tempered glass planes to create a solar PV module. A junction box with bypass diodes is added that enable easy installation and ability for other modules to operate also if there is a fault of shadow on a single module in a long series. Single glass modules do exist but Miale use double glass for better durability. A solar PV array consists of many modules in series of one or several parallel strings. The solar PV array provides DC power to the inverter where it is converted to AC power. Solar PV systems feed power to the facility where mounted, reducing the need for power bought from the grid. Power generation from the solar PV system will be at daytime and will vary with the solar irradiation.

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Power generation from the solar PV system will be at daytime and will vary with the solar irradiation. If there is no energy storage in the solar PV system the generated solar electricity must be consumed instantly by electricity demand in the facility. As long as there is a load (power consumption), electricity from the solar PV system will replace electricity from the grid. If the load is higher than the power currently generated by the solar PV system, the excess power will be supplied from the grid. If the load is lower than the power currently generated by the solar PV system at the installed line, the inverters adjust their output down to fit the power demand. This is called a zero export control functionality and is needed since KPLC currently does not allow for reimbursement for excess solar PV power fed to the grid unless the system is larger than 500 kWp and the owner acquires special approvals.

Miale also offers hybrid systems that include capacity to store electricity in modern Lithium batteries. The system will then save the excess energy during daytime to be used during evening, night and morning hours. Hybrid systems also give island mode capacity to the facility, meaning that electrical equipment can be used also during times when the grid is not working. Saving cost for generator fuel that may otherwise have been consumed. A hybrid system can also do peak shaving, meaning that the main fuse size, and associated costs, could in some cases be reduced.

Power generation from the solar PV system will be at daytime and will vary with the solar irradiation. If there is no energy storage in the solar PV system the generated solar electricity must be consumed instantly by electricity demand in the facility. As long as there is a load (power consumption), electricity from the solar PV system will replace electricity from the grid. If the load is higher than the power currently generated by the solar PV system, the excess power will be supplied from the grid. If the load is lower than the power currently generated by the solar PV system at the installed line, the inverters adjust their output down to fit the power demand. This is called a zero export control functionality and is needed since KPLC currently does not allow for reimbursement for excess solar PV power fed to the grid unless the system is larger than 500 kWp and the owner acquires special approvals.
Miale also offers hybrid systems that include capacity to store electricity in modern Lithium batteries. The system will then save the excess energy during daytime to be used during evening, night and morning hours. Hybrid systems also give island mode capacity to the facility, meaning that electrical equipment can be used also during times when the grid is not working. Saving cost for generator fuel that may otherwise have been consumed. A hybrid system can also do peak shaving, meaning that the main fuse size, and associated costs, could in some cases be reduced.

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