Solar PV rooftop system is basically a small power plant at your rooftop. The On Grid Roof Top Solar Photo Voltaic (PV) mainly consists of three major components. These are the solar PV modules, mounting structure for the modules and the inverter or power conditioning units. Solar PV modules form an array and it requires a mounting structure to hold PV modules at the required angle for maximized generation. The solar panels convert solar energy in the form of light into electricity in DC form (Direct Current). The DC electrical energy is converted to AC (Alternate Current) power by the inverter/power conditioning unit which is connected to the power grid through AC distribution board. The AC power output can be measured through metering panel connected to it. The 415 V AC output of the system can be synchronized with the grid and the electricity can be exported to the grid depending upon solar power generation and local consumption.
In a grid connected rooftop photovoltaic power station, the generated electricity can be sold to the grid at a price higher than what the grid charges for the consumers. This arrangement provides payback for the investment of the installer. Many consumers from across the world are switching to this mechanism owing to the revenue yielded. The Feed In Tariff as it is commonly known has led to an expansion in the solar PV industry worldwide. It has also increased the ability for localised production and embedded generation reducing transmission losses through power lines.
Benefits of Rooftop Solar PV systems
Cost of electricity is increasing. Electricity utility companies are bound to increase the cost per unit of electricity due to increase in cost of fuel.
Many regions in the country are facing severe power cuts extending to 12 -14 hours in a day.
Grid tied solar PV systems are the most common systems for captive power generation. It is technologically feasible to have hybrid systems such as Solar PV +Grid or Solar PV +Diesel Generator
It cost about (only ground mounted at roof) Rs. 2 Lakhs/KW with battery storage and 1.5 Lakh/KW without battery storage. It seems high as compared to conventional diesel power generators. However, operational cost for diesel generator is very high. Considering the replacement cost of power generation from diesel generators, solar PV systems provide attractive returns.
The term off-grid refers to not being connected to a grid, mainly used in terms of not being connected to national electrical grid. Off-grid can be stand-alone power system to provide a smaller community with electricity. Off-grid electrification is an approach to access electricity use in countries and areas with little access to electricity, due to scattered or distant population. The term off-the-grid (OTG) can refer to living in a self-sufficient manner without reliance on one or more public utilites. Our customized power plant solution is capable of running everything just like regular electricity and in fact, the quality of power is far superior compared to grid power in most places.
Grab alter has vast expertise in all aspects of engineering procurement and construction of solar roof top plants. Our solutions are tailored made as per the energy needs of the custumers and the characteristics of the building.
Areas of applicaion:
Climate change and fossil fuel depletion are threatening our very existence on this planet. This is primarily due to our dependence on fossil fuels for an upkeen of modern day lifestyles. Nearly 75% of energy takes place in urban and semi urban areas accommodating large chunks of population. The rapid urbanization with an accompanying economic development is responsible for sudden rise in energy demand. Essential public service like electricity services for homes, transport, industry, commerce, and other infrastructure run by virtue of fossil fuels. To secure the energy supply for all this and to mitigate the risk of climate change, Renewable energy source of energy form the most obvious solution. With its abundant solar energy, India can exploit this resource easily.
India is developing nation and cannot halt its development goals. While we have a need to cut down the GHG emissions, it also has to ensure that its infrastructural growth is not hindered in any way. Solar energy in India is a potential huge source of energy. If we are able to harness the high amount of sunlight received by India, then we can meet its energy like no other fuel.
Grab alter will develop PV power plant which are specifically tailor made as per the custumers needs and geographical location of the construction site. Our engineers will Design and implementto harness max suns energy and to operate the plant at its max possible efficiency.
A solar-powered pump is a pump running on electricity generated by photovoltaic panels or the thermal energy available from collected sunlight as opposed to grid electricity or diesel run water pumps. The operation of solar powered pumps is more economical mainly due to the lower operation and maintenance costs and has less environmental impact than pumps powered by an internal combustion engine(ICE). Solar pumps are useful where grid electricity is unavailable and alternative sources (in particular wind) do not provide sufficient energy.
The solar panels make up most (up to 80%) of the systems cost. The size of the PV-system is directly dependent on the size of the pump, the amount of water that is required (m³/d) and the solar irradiance available.
The purpose of the controller is twofold. Firstly, it matches the output power that the pump receives with the input power available from the solar panels. Secondly, a controller usually provides a low voltage protection, whereby the system is switched off, if the voltage is too low or too high for the operating voltage range of the pump. This increases the lifetime of the pump thus reducing the need for maintenance.
Voltage of the solar pump motors can be AC (alternating current) or DC (direct current). Direct current motors are used for small to medium applications up to about 3 kW rating, and are suitable for applications such as garden fountains, landscaping, drinking water for livestock, or small irrigation projects. Since DC systems tend to have overall higher efficiency levels than AC pumps of a similar size, the costs are reduced as smaller solar panels can be used.
Finally, if an alternating current solar pump is used, an inverter is necessary that changes the direct current from the solar panels into alternating current for the pump. The supported power range of inverters extends from 0.15 to 55 kW and can be used for larger irrigation systems. However, the panel and inverters must be sized accordingly to accommodate the inrush characteristic of an AC motor.