Solar plant installation and energy companies in Delhi NCR

Solar Essentials

Solar Essentials

How does solar work?

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.

Types of solar systems:

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.

Can I install rooftop solar?

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.

Things to keep in mind when installing rooftop solar?

Some essential things that you must keep in mind during various stages of installation are below:

Before installation:

  • Understand the cost involved and savings you will make, and any tax benefits etc when you go solar.
  • Get your home or office surveyed from an expert solar company to help calculate shading and to estimate installation capacity, generation and utilization of solar energy.
  • Roof or land should be exposed to the sunlight for the whole or for most of the day.
  • Guarantees and warranties of each component, workmanship and plant performance needs to be discussed in detail and should be included in the contract.
  • You should contact only qualified and reputed Installers/ Suppliers or visit AP Greens Solar Inc platform to know the most accurate benchmark prices in the market. Find out the right system size that fits your budget without compromising the quality as the solar system has to have atleast a 25 year life.
  • Select the best quality of mounting structure and hardware. It may be slightly more expensive, but you will be assured about quality, durability and lifespan of 25 to 30 years.
  • Specifications of solar components, material and payment terms needs to be agreed with your installer.
  • Discuss with your Installer on permits and approvals required.

During installation:

  • Requisite care and safety must be observed while unloading, shifting and placing of solar components.
  • Delivery of material and components must be done with relevant documents at site.
  • Ensure adequate access to the site for the workers and material / equipment.
  • Specifications of material/ equipment received should be as per the contract.
  • Civil foundations should be well finished and plastered.
  • Curing of civil foundation should be properly done.
  • All hardware should be tightly and properly fitted in the foundation / structure / wall since loosely fitted solar panels can result in major damages.
  • Fasteners should be provided in each hole of solar panel.
  • on structure should be laid through pipe. Cabling on wall and structure should be well tagged, clamped and dressed.
  • All electrical connections should be identified and should not be in loose condition.
  • All structures/ panel mounting arrangement, equipment/ components should be connected properly to an earthing system at two defined positions. This may not be required for very small system sizes. Consult an expert on it.

Post installation:

  • Keep the contact details of the installer handy all the time.
  • Request for all guarantee and warrantee certificates / documents, system test reports, energy meter test reports, permits, documents related to incentives and subsidies alongside relevant approvals from DISCOM, if required.
  • Clean the solar panels before 10 AM or after 5 PM to ensure that the system generation is not adversely affected.
  • Keep solar panel clean to ensure high efficiency and performance of your solar system and ensure that you do not leave panels with accumulated dust, fallen leaves and bird droppings.
  • Use clean water for cleaning of the solar panels.
  • Do not hang clothes on solar panels or structures.
  • If you face any problems with the system, please call your installer or the maintenance service provider.
  • There shouldn’t be loose cabling and wiring on roof floor.
  • Avoid allowing kids unattended in solar installation area.

How much will my solar rooftop system cost?

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