When the rays of the sun fall on modules, the individual cells inside the module help convert sunlight into DC electricity. However, most appliances in our home work on AC electricity, and therefore the modules are connected to an inverter which does this conversion. Once the converted , the output of the inverter which is AC electricity, is connected to the mains of your home to allow you to use solar energy.
It is important to note that you can use electricity from your rooftop solar power plant parallel with the electricity sourced from your DISCOM. This kind of arrangement is very common and one that solar installers are expert at managing. However, if you want to go with a system that is backed by a battery to help you use solar at night time, you must go for a hybrid or an off grid system.
Grid connected systems or on-grid systems, are solar systems that are connected to the building mains directly. These systems give priority to the solar power generated and only if the generated power is less than that required, will the grid power be used. In case you opt for a grid connected system, you are eligible for Net Metering, a process where all the excess power that you produced is fed back to the grid and you receive a credit for the same. In case you generate more than you consume in one complete year, the DISCOM also pays you for the excess units generated
Off-grid solar systems are different from the on-grid system in the sense that they are set up independently from the state grid. These systems have an additional battery backup system which is charged by the generated solar energy. Batteries are charged when the generated power is more than the power being consumed. The battery needs to be replaced every five years or so but on the positive side, you can use solar energy even in the hours where there is no generation. Off-grid systems are perfect for your rooftop solar plants if you have a very erratic power supply or do not get any power at all.
A hybrid system brings the best of both worlds and is a combination of an on-grid and off-grid solar system. Hybrid systems have a battery backup which helps store the generated energy. once the battery is fully charged, any excess power generated which is not being utilised will be fed back to the grid and the you will get suitably compensated. A hybrid system can also have other sources of energy producers, such as Diesel Generator (DG) in the system.
Area: First thing you must check is whether you have enough clear area to install solar panels
Consumption: Due to the saving you make on your electricity bill, higher your electricity, the more beneficial going solar is in general.
Policy: Several states have made Net Metering mandatory as well as offered some really lucrative schemes for you to install a rooftop solar PV plant. Make sure you are well aware of the policy in your state and stay up to date with the same.
Net Metering: Just like solar policy, Net Metering policies differ from state to state. Some DISCOMs are faster in processing the applications whereas some are slower.
Approvals: Installing rooftop solar PV plant may require an approval or NOC from your DISCOM depending upon the type and size of your solar system.
Shading: If you have a lot of shading on your rooftop, there are some alternatives that the Engineering & Design team can offer. AP Greens Solar Inc specializes in providing advanced shading analysis tools and site assessment services.
Some essential things that you must keep in mind during various stages of installation are below:
The cost for your site varies depending upon various factors such as location, shading, available rooftop area, structure type etc, the costing may vary based on the degree of complexity. Calculate My Solar Rooftop System Cost