Basics of Rooftop Solar

How much roof area is required to install a rooftop solar PV system?

Size of a rooftop solar PV system depends on the roof area available for installing the solar panels. It is very important to ensure that no shadow falls on the solar panels throughout the year therefore, it becomes very important to calculate the available shadow-free area out of the total roof area for installing the solar panels. According to the rule of thumb, 10 square meters shadow-free area is required for installing a 1-kilowatt rooftop solar system.   Like this:Like Loading... Read more

How can I check if my roof is suitable to install solar PV?

A quick inspection of your roof is the first step in determining if you can install a rooftop solar PV system on your roof. The following are a few factors that one can check (before the installers) to know if the roof is suitable for the installation of solar PV. 1. Roof orientation¬† The best position for solar panels is towards the south, but even west- and east-facing roofs can accommodate solar panels. However, you should keep in mind that skylights, air-conditioning units, and pipelines etc. installed on the roof can affect overall available space for the installation of solar panels. 2. Shading on the roof It is important to take note of the shading caused by nearby water tanks, antennas or buildings & trees. These objects can have an effect on the performance of the solar PV system by causing obstructions between the sunlight and the solar panels. If you have a high-rise building casting a shadow on the complete roof area, installing solar panels on this roof may not be ideal, it would be better to avoid the installation in such shaded areas. 3. Age of the roof The age of the roof/building is also one of the important factors primarily in the metal/asbestos roofs. Although the solar PV installation expert will study the roof profile in detail before designing and installation, here are a few points that can be observed: Loose or broken tiles Punctures and cracks Standing water/leakages Any type of structural damage The video explains […] Read more

What is an off-grid solar PV system?

Off-grid solar PV systems are incredibly useful for consumers who do not have access to the utility grid and for those who want to fulfil their energy needs through alternative source. These systems require batteries to store energy. Off-grid systems generate power during the day which is utilized for powering captive loads as well as to charge the batteries. When solar energy production is lesser than demand, the stored energy from the batteries is used to power loads. The initial cost as well as the recurring cost of an off-grid solar system is higher than a grid-connected solar PV system. These systems can supply output both in AC and DC form depending upon the connected load and designed configuration. The working of an off-grid solar PV system is explained in the video, below. Video by: Wholesale Solar, Inc. (YouTube Channel)   Like this:Like Loading... Read more

What are the benefits of installing rooftop solar system?

Reduction of energy bills – Installing solar power plant can help to save substantial amount of money on electricity bills. Per unit cost of energy generated from the solar plant is comparatively cheaper to energy purchased from the utility. Use of underutilized roof area – Installing solar plant on the roof is most effective way to utilize roof. This not only increases the value of the home but also offers multiple financial benefits. Participation in building modern Indian power system – Installing solar power plants supports creation of distributed power generation network and reduces need for extensive use of fossil fuels. Reduce power losses – The energy can be produced though solar power plant on your own roof and can be consumed within your building, which limits transmission losses. Renewable energy source – Unlike fossil fuels and natural gas, the sun is a source of energy that is renewable. Going solar reduces our dependence on the fossil fuels. Shrink your carbon footprint – Going solar reduces the CO2 emissions, the leading cause of climate change and global warming. Like this:Like Loading... Read more

What is a grid-hybrid solar PV system?

A grid-hybrid PV system is also a grid-tied system and is ideal for consumers who are already connected to the utility grid but are prone to power outages. These systems are similar to grid-tied solar PV system, but with a battery bank connected to it. Batteries offer emergency backup power during grid failure. During an outage, the batteries take over as a backup power source to power critical appliances. Similarly, if energy generated by the system is more than required, the surplus power generated can be exported to the utility grid. These systems cost more than grid-tied solar PV systems as the cost of battery banks is additional. Like this:Like Loading... Read more

What is a grid-tied solar PV system?

A grid-tied solar PV system is a power plant that is connected to the utility grid and uses electricity from both the solar system and the utility grid. These systems do not have to meet all of the electricity demands of the consumer electrical load. If needed, the load can draw energy from the grid at times (such as on cloudy days or at night) when the system is not generating electricity as per demand. Likewise, if energy generated is more than required, the surplus power generated can be exported to the utility grid. These systems are connected to the main utility grid supply panel of the consumer facility and are designed to generate power when the utility grid is available (figure). In case of grid failure (blackout) or fluctuation outside permissible limits, the system stops working immediately and isolates itself from the grid. These systems are cheaper than battery-based solar power systems as there is no battery backup included, hence reducing the overall cost of the system. The working of a grid-tied solar PV system is explained in the video, below. Video by: MaXolar Energy (YouTube Channel) Like this:Like Loading... Read more