Accounting methodology under which certain Fixed Assets can be depreciated at higher rates in the early years of their asset lives. This directly translates to tax savings.
Current which changes its polarity, magnitude and direction in a cycle. (50 cycles per second in India)
Whole groups (strings) of modules in a solar PV system.
Tracking control mechanism (algorithm) which minimizes the panel-on-panel shading.
A meter which moves in both directions. It moves in forward direction when you import power from the grid and in backward direction when you export power into the grid.
One of the ownership models, wherein users have to pay the total cost of the system to system integrator and are also responsible for O&M.
In this model, the solar system is owned by Rooftop owner and has to bear the cost of solar syatem. Rooftop owner will also be responsible for operating & maintating the solar system.
Ratio of actual electrical energy generated over maximum possible energy for any given time frame.
Subsidy on solar system cost will be granted by MNRE subject to approval & availability of funds. You have to contact State Nodal Agency/ Energy Department for availing the same.
Subsidy or support, which may be provided by MNRE (Ministry of New and Renewable Energy) for the installation of Solar PV Systems in residential, institutional, social sector or government buildings, if they qualify certain conditions.
Used in large scale applications. Here strings are connected to a central box (combiner box), output of which is then connected to the inverter.
Sum of rated capacity of your electrical appliances/equipment.
Task performed to bring failed equipment to its working condition.
Delhi Electricity Regulatory Commission
The device which logs events (breakdowns, shut downs etc.) and different parameters of equipment for further monitoring and analysis.
Current which flows in only one direction without changing its polarity and magnitude.
Payment made to houses or businesses which generate their own electricity without hampering natural resources. The payment is proportional to the power generated.
Optimum panel tilt fixed for the whole year (generally equal to latitude of the site) to maximize the power output of the panel.
The level at which levelised cost of electricity produced by the solar system is equivalent to the price of purchasing electricity directly from the grid/local utility.
Process of matching voltage and frequency of generator to the grid or electrical network. In solar it is done by solar Inverter.
Metering mechanism to record the entire generated power fed to the grid. No power consumption is allowed at generation end.
A promise or assurance from an equipment manufacturer, which enables the customer to replace the complete item if it underperforms the prescribed standards within a specified period of time.
Tension Line used for supply of 11kV and above.
Amount of solar energy received per unit area in unit time. It is measured in kWh/m2.
Contract by which an insurance company provides compensation in case of occurrence of a specified damage or loss.
The rate at which sunlight is received by a surface at a given point of time. It is typically expressed in W/m2 (watt per square metre).
LCOE from a power plant signifies how much each unit of generated electricity would cost if the total cost of setting up and operating the plant was spread over its lifetime. It’s the most commonly used metric for comparing the cost of electricity generated from different sources.
Low Tension line having supply of 415V for 3-phase and 230V for single phase connection.
Angular distance of a location from the equator.
Capacity of transformer installed at nearest electrical sub-station for supplying electricity to all houses in your area.
Angular distance of a location from Greenwich Meridian.
Ministry of New & Renewable Energy, Govt. of India
A technique used to maximize power from solar PV system.
Connected with each solar panel and converts DC power into AC at module level.
Billing mechanism which allows consumers to utilize the generated solar power for their own purpose and feed the generated power to the grid which they don’t use.
Administrative agency of state government having responsibility to support the implementation of solar policies and programs.
A standalone system that is not connected to the grid. Its capacity typically ranges from 1 kW (individual home) to 100 kW and even more, and is supported with battery bank. Most commonly installed in rural areas, where access to grid is either poor or not available.
A system that is connected to the utility power source or your existing electrical network.
Power Conditioning Unit simply known as inverter.
An agreement between the seller of power and the purchaser. It includes term of the agreement, quantum of electricity, rate of power and other commercial terms.
Fall in the power output of solar panel with respect to manufacturer’s specification due to its exposure to the sunlight during its lifecycle.
Angle at which solar panel is mounted on the structure.
The time period required to recover the total cost of your investment.
Maximum load on any electrical network/system during any specified time frame like during day, month and year.
An actual performance indicator of solar power system, which shows how efficiently your solar system is performing.
Covers the conversion of solar energy into direct current electricity using semiconducting materials, such as silicon, Gallium, CdTe etc.
Ensures a stable power whose voltage and frequency varies within of specified tolerance.
Planned maintenance to reduce or eliminate the possible breakdown or failure of any equipment.
Banks give solar sector a priority (i.e. first preference) in obtaining loans from banks at a low rate of interest. Renewable energy sector has been added to priority sector lending in the year 2015.
One of the ownership models, wherein user is not required to pay the total cost of the system upfront to system integrator. Here users have to pay only cost of energy on per unit basis as per agreed terms with solar system integrator.
In this model, the solar system is not owned by Rooftop owner. 3rd party owner will operate and maintain the system. No upfront cost is to be paid by rooftop owner and he has to pay only for the energy generated from the solar system on agreed rate for specifed time period.
The costs that are incurred repeatedly during the entire lifecycle of project. For instance, Operations and maintenance costs.
A performance indicator of your Investment. High ROI number means high profitability.
Slope angle of roof. Its value is zero for flat roof.
Direction of roof with respect to its optimum position i.e. true south.
Indicates maximum load that any consumer can utilize. Exceeding this may cause penalties from Distribution Company.
Optimum panel tilt as per season (summer and winter) to maximize the power output.
Two wire supply system having one wire for power and other one is neutral. In India, 230V is standard single phase voltage.
A system that combines the solar power system with other power generating sources like DG, wind, biomass, gas or utility grid supply.
Grouping of solar panels (modules) wired together in series or parallel.
Strings wired directly to inverter to convert DC output of the string to AC power. It is generally used for small and medium scale applications.
Tandem junction is process to enhance the performance of thin film module.
Has 3 wires for power (R, Y, B) supply and one neutral wire. Standard voltage between phase to phase is 415V and between phase to neutral is 230V.
Orients the panel towards sun as per sun’s direction in order to maximize the power output from the solar panels.
The commercial organization that owns and operates the infrastructure required for the generation, transmission and/or distribution of electricity to the public.
Systems (generally in the form of solar farms) that are greater than 1 MW and connected to the medium/high voltage power grid.
A promise or assurance from an equipment manufacturer, which enables the customer to get the item repaired if any defects occur within a specified period of time.
Apparent power including active and reactive component of power together.
The unit of electrical energy that is equivalent to the usage of 1000 watts for a period of one hour. The total amount of energy generated by your solar system is measured in kWh.
Commonly used measure of the maximum possible output of the solar system under standardised testing conditions (STC) i.e. irradiation 1000W/m2 at a temperature of 25 degree C and air mass 1.5.
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