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FAQ's on Grid Solar systems

There are 3 main components of a Grid-Tie Solar Installation. The solar panels, grid-tie solar inverter, and the bi-directional meter.
The solar panels absorb the sunlight that falls on them and converts it into DC current. Then, the Grid-Tie inverter converts that DC current into AC current so that it can be used by appliances and devices. This AC current is then fed to the main power supply to the building from where it powers all connected electrical load. The energy which does not get used up and remains in surplus is sent back to the grid via the bi-directional meter which keeps track of all the energy supplied by the grid and to the grid.
The grid is the main component in the installation. When the grid fails, the system fails and does not generate any electricity.
When the solar panels fail to receive sunlight, electricity is taken from the grid to power any connected load.
You save money using a Grid-Tie Solar Installation as you power all you’re connected through solar, and you do not need to pay for electricity from the grid.

You can make money using your Grid-Tie solar installation by selling excess electricity/energy to your state electricity board. You can get paid up to Rs 7-9 per unit of electricity you sell to them provided they have an active net-metering policy.
People living in areas with reliable but expensive power supplies, enterprises that operate primarily during the daytime hours and people living in areas with an active net metering policy can all benefit immensely from Grid-Tie Solar Installations.
Central Finance Ministry provisions financial assistance of 15% of the Total cost of total Rs.12 per watt or Rs 1.20 crore per MWp under grid-connected solar systems and small solar plant program of the ministry
About 10sq.m area is required for a grid-connected solar power installation.
The advantages are as follows
  • Low gestation time
  • No requirement of additional land
  • Local employment generation
The system does not require regular checkups 2-3 times a year. You can do a yearly maintenance to check whether all the components are working properly or not.
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FAQ's on Off-Grid Solar Systems

An off-grid solar installation is made up of 4 parts, solar panels, solar inverter, charge controller and a battery. The solar panels absorb the sunlight that falls on them and converts it into DC current. Then, the inverter converts that DC current into AC current so that it can be used by appliances and devices. This AC current is then fed to the main power supply to the building from where it powers all connected electrical load. Surplus DC current is stored in the battery for future use. The solar inverter has a solar charge controller built inside it. It is connected to the battery and makes sure that the right amount of voltage and current are delivered to charge the battery.
When the solar panels fail to receive sunlight, electricity is taken from the battery to power any connected load.
The key difference is that the Off-Grid stores surplus energy into a battery, while Grid-Tie fits it back into the grid.
RAPS is the abbreviation of Remote access Power System which allows off-grid operation for locations which are not connected to the power grid or during a blackout.
The DC electricity produced by the solar panel array is routed through wiring to a solar regulator or charge controller which regulates the charging of deep cycle battery bank. DC appliances can thus be run off the battery or via aninverter to supply standard household appliances.
This varies greatly on the basis of your energy consumption and property/business size. But on an average, you need 75 to 120-watt solar panels for every 200 AH battery. For more accurate estimate use our solar Rooftop Capacity Calculator.
Again, It varies greatly on the basis of your energy consumption and property/business size. For example, if you plan on using a notebook all day, LED lighting and a few other small appliances, a 100Ah battery should suffice depending on the size of solar panels you have to charge it.
The solar regulators measured amp rating should slightly exceed the total amp rating of the solar panels. We would recommend a properly sized regulator depending on the energy consumption information that you provide.
Yes it does, proper wiring size, wire diameter reduces wastage of energy through heating and also protects against fire hazards.
Yes, your remote power system should be grounded via battery bank.

FAQ's on Solar power

On an average, 1 kw system is requires around 12-15 square meters of shadow-free space.
Many Indian states have started a scheme of paying consumers up to Rs. 9 per unit of electricity to sell their solar electricity to the state grids. This is called solar net-metering.
On an average, a 1kw off-grid solar installation ranges between Rs. 8,000 to Rs. 1,00,000. However, this is a figurative value.
There are numerous benefits of installing solar products. When you install solar energy system on your property, you save a lot of money in electricity bills and also protected against rising electricity rates.
At Eastman, environmental benefits are our prime objective, solar energy is a renewable resource thus using solar energy reduces greenhouse emission and also results in fewer air pollutants like sulfur dioxide.
Studies have shown that properties with solar power sell at a higher price than those without them. Although the hike in price does depend on whether you own the solar panels or lease them. It is seen that it tends to increase if you own them.
Select solar panels which use the best grade of silicon to produce solar cells and are produced by a manufacturer who is vertically integrated i.e make their own cell and wafers.
The decision to buy or lease solar systems depends on your reason and usability but it is recommended that you buy solar systems instead of leasing them.
The major difference between secured solar loans and unsecured solar loans is that secured solar loans require you to promise some collateral like your home or valuables as insurance. Unsecured solar loans do not require anything of the sort but their interest rates are high.
The size of the solar system depends upon the amount of electricity you use in a month and the weather conditioning in your residence. Compare your previous electricity bills with licensed pre-screed solar installers to determine the best system.
Solar panels are very strong and capable of withstanding all kinds of weathers. Although different components of your solar system will need replacing at different intervals of time on an average, your solar system should last you 25-35 years.


FAQ's on Residential Rooftop

Using solar charge controller and Solar panels. Solar Charge controller must be connected to the solar panels, battery, and inverter. When the solar panels generate DC current, it goes through the charge controller and onto the charge batteries. A Solar charge controller is responsible for protecting the battery from very high voltages coming from the solar panels. When the batteries are fully charged by the solar panels, you can switch off the mains. This way, the inverter will detect a power cut and will switch itself on to run your electrical load using the energy stored in the batteries.
Solar inverters display number of units of electricity they generated in a day. Multiply that with the cost per unit of electricity that the state pays, and then multiply that by 365. That is your annual savings on Solar.
Solar panels do not usually need to be heavily maintained and they last up to 25 years. However, due to the environmental and climatic conditions of India, dust, and silt can deposit on their surface, thus hampering their performance. A simple way to deal with this problem is by cleaning your solar panels weekly with a dry cloth or with water.
Your solar installer should be able to tell you the best angle for solar panels. As India lies on the equator, solar panels should be facing south if you live in the northern regions and north if you live in the southern regions in order to get maximum sunlight.
The typical residential rooftop solar installation takes around 40 hours on the roof and 10 hours inside the house.
Most residential installations require a permit. Your registered installer will know how to get these permits from the local authorities.
The systems are quite complex and require qualified experts to install them properly. So, it is recommended to consult a certified technician to install them.
Solar installations are a viable option for most homes. All you need is an unobstructed area and 120 square feet for a solar installation.
Almost all installations today come with an inbuilt monitor will lets you know about the status of your solar installation and its efficiency.
If you need to have work done on your roof, then your solar installation project will be put on hold. Once you have your work done contact your technical and have the installation done.