Why go solar? What are the benefits of solar electric power?expand_more
  • Solar energy is clean and renewable.
  • Lowers the cost of your electricity bills and also reduces the negative impact on the environment
  • PV plant has no moving or wearing parts, and require no maintenance other than an occasional cleaning.
  • It’s a quiet and clean source of energy requiring minimal maintenance, and lasts for decades.
  • It is not only competitive with other sources of energy in terms of costs, but often times cheaper.
  • What are photovoltaics? Is the PV module a hot water producing system?expand_more

    Photovoltaics are cells made of semiconductor material and they use solar energy to free electrons from atoms. These moving electrons result in electricity.

    A group of PV cells are connected in a module to form a single structure. These modules are connected to form a solar plant.

    Solar heating systems or solar thermal heating systems provide hot water by using solar energy to exclusively for heating water. On the other hand, a solar plant with PV modules can be used for all energy needs, including and not limited to, heating water.

    How much electricity does a rooftop solar PV system generate?expand_more

    Use our Solar Calculator for a rough estimate. Contact us for a detailed estimate!

    We also have an article in our blog post under 'Understanding Solar' section for benchmarks on how to calculate it yourself and what factor determines the capacity.

    Do I need plan permission from the Municipal Authorities?expand_more

    The roof top solar systems do not need any permission for self-consumption needs only. Prior permission is to be taken from DISCOM to install the Solar system if it involves a net metering system (selling excess solar power back to the electricity utility company/DISCOM)

    What is a PV system? What is an inverter?expand_more

    PV technology produces electricity directly from electrons freed by the interaction of sunlight with a solar panel made of semiconductor material. The power provided is direct current (DC) electricity. A PV system will consist of an array of modules generating DC electricity, an inverter to convert the DC currect to AC and sometimes battery storage back up with charge controller.

    Is it true that solar energy and solar designs work well only in warm, sunny climates? Do PV modules work on cloudy or rainy days?expand_more

    Solar panels work just fine in ambient light and will produce significant energy in the fog or on overcast days. In fact, solar panels are actually more efficient at cooler temperatures than hot ones. If there is enough light to see your hand in front of your face, then solar panels can produce electricity.

    PV modules produce power anytime the sun is out. On cloudy days power output is considerably reduced.

    What happens if the PV module is blocked by leaves, shadows? Does PV work well in cold weather?expand_more

    If fallen leaves, shadows or something similar cover a PV module, resistance increases at the affected area and overall power output decreases significantly. PV modules incorporate a Bypass Diode function that minimizes the effect of shadows on the unit’s surface area.

    As photovoltaics generate electricity from light, not heat, PV technology is highly suitable for cold weather environments, on the whole even generating more power at lower temperatures. This is because they are electronic devices, and almost all electronic devices operate more efficiently at cooler temperatures.


    What is the standard lifespan of a grid-connected rooftop solar PV system?expand_more

    PV modules generally have a product life of about 25 years, and hence solar plants are considered to have a 25-year project life (The CERC - Central Electricity Regulatory Commission - a key regular of the power sector in India - also assumes a 25-year useful life in the calculations for solar PV projects.

    How much do the solar PV panels weigh? Are the solar PV panels fragile?expand_more

    Normally about 13 kg per square meter of panel. Most panels are around 1.6-1.8 square meters.

    Solar PV panels are very robust and can withstand the normal stresses subjected by nature.

    Does the PV module surface require cleaning?expand_more

    In most residential areas no cleaning is necessary, as rainfall will remove the majority of grime. Solar panels have no moving parts and do not require regular maintenance. Typically, the recommendation is to hose off the panels once a year or so. Typically, this will cause only a very slight loss in efficiency (about 5 percent) over the lifetime of the panels.

    Myth: Solar panels will cause my roof to leak, deteriorate, or collapse.expand_more

    Solar panels actually protect and preserve the portion of the roof they cover. Most solar panels are not attached directly to the roof itself, but rather to a mounted railing system. Installers add sealants to fill in any gaps and often the mounts are surrounded by metal “flashing,” or coverings that act as an extra barrier from the elements.


    Will my roof be strong enough?expand_more

    Most roofs are strong enough to take a solar installation without any reinforcement. However, in case of larger systems, it is suggested to obtain the opinion of a qualified Structural Engineer. We will do this check for you.

    Are there any technical standards for various components of the system?expand_more

    In short, yes. The various components of SPV system shall have IEC/ISI/BIS Certification and confirm to technical standards specified by MNRE/APTRANSCO/DISCOMs. You can learn more about project execution standard in our blog section 'Understanding Solar'.

    How long will it take to complete a rooftop solar power plant installation?expand_more

    It takes not more than 4 to 8 weeks to complete a solar rooftop installation.

    Does rooftop solar PV generate power during a power failure?expand_more

    Not all rooftop solar plants generate power during a power failure; only some do. The difference lies in the inverter and the functionality it supports. Grid-interactive and hybrid inverters supply electricity even during a power failure while grid-tied and off-grid inverters don’t.


    Is solar still so expensive that it will never pay for itself? Solar power only works because of government incentives?expand_more

    Solar panels return two to four times their cost in saved electricity bills and typically pay for themselves completely within 5 to 10 years. If you live in a state with good incentives, the payback period can be as short as 2 to 4 years.

    Subsidies for solar systems typically and historically feature fixed time of operation, diminishing year-on-year subsidy amounts, and a sunset when the subsidy ends and solar power — in order to successfully matriculate into a mainstream energy choice — must be available at market price or as we like to say, achieve grid parity. India has achieved grid parity for most categories of users.

    Can Accelerated Depreciation benefits be claimed by Solar Power Developers?expand_more

    Yes. Accelerated Depreciation benefits can be claimed by Off-Grid and Grid-Connected Solar Power Developers in order to offset taxes on profits from their connected businesses. Typically, 90% depreciation is allowed with 80% allowed in the first year.

    Is rooftop solar power cheaper than diesel/grid power?expand_more

    Rooftop solar power is much cheaper than power from diesel generators. Solar PV generates power at a cost of about Rs. 4.5-5/KWh while diesel generates power at about Rs. 16/KWh. Whether solar is more expensive than grid power depends on your current tariff. Solar power is cheaper than grid power for many consumers such as consumers paying a commercial tariff.