Frequently Asked Questions


Commercial

The cost of your solar investment will vary depending on the following parameters

  • 1. Size of the Solar system installed
  • 2. Location of the house
  • 3. Available State incentives for Solar Power.

To find out more about the reduction in electricity bill with a Rooftop Solar PV system, get your FREE solar quote from the AHA Rooftop Solar Helper or AHA Solar APP.

Yes! Rooftop solar PV systems sold in the India are eligible for a 30% Central Government rebate. Additionally, State, local and utility incentives exist in region wise, further lowering the net cost of your investment.

Ask an AHA Rooftop Solar Helper about available incentives in your area.

Rooftop solar PV system generated electricity throughout the day whenever sun is available. Based on the installations capacity and usage, Rooftop solar PV systems can produce more electricity than usually used by a household in a month, bringing net electricity costs to Rs. Zero.

However, our customer chose to remain connected to traditional grid system. There is still a minimal connection fee to remain connected to the electrical grid.

Currently, most of states in India are under a system known as Net Metering, which allows your net electricity costs to be reduced to zero, but no further. In case the electricity generated by you is fed in the grid, you can be paid for any excess electricity. This is known as a Feed-In Tariff system but it is applicable only in few regions.

We do offer financial aid options at attractive rates via tie-ups with various financial institutions and banks.

Yes, Solar is a great investment! The money invested is more productive than that invested in saving account schemes.

With technological advancements, the price of solar panels has reduced drastically and the photovoltaic panels are expected to become cheaper. Moreover, the FIT or the offset against the power can provide an attractive source of income/ savings. For all those conscious about global warming, solar rooftops not only help you save money but they also benefit the planet.

Absolutely none! We provide a complete transparent process. But everybody's installation is unique, but we strive to ensure that everything is as smooth as possible.

Call us now if you have any questions!

It is the payment that you receive from your utility company for your unused electricity. In some states, the distribution company pays you for feeding power into the utility grid. However, the rate varies across the states and utilities.

The prices of coal and other non-renewable sources of energy are on the increase. This trend will continue into the future, getting more dramatic with shortages in the supply of nonrenewable sources. On the other hand, price of your electricity generated from sun via rooftop solar PV system will stay constant, as the fuel (solar energy) is free and infinite!

For rooftop solar PV scheme two contemporary attractive options are mentioned below.

a) CAPEX Model: With this option, the entire system is owned by the rooftop owners. Responsibility of O&M (Operation and Maintenance) for the system, throughout the lifetime (25 years) is with the rooftop owner. All subsidies from central and state government are to be claimed by the owner.

b) RESCO Model: Here, the entire system is owned by the developer. Responsibility of O&M for the system lifetime (25 years) is also with the developer. Rooftop owners may consume the electricity generated, for which they have to pay a pre-decided tariff on a monthly basis. Excess generation may be exported to the grid, subject to availability of requisite state regulations.


General

A Rooftop Solar PV system is made up of different components. These include PV modules (groups of PV cells), made up of PV panels, one or more batteries; a charge regulator or controller for a stand-alone system, an inverter for a utility- grid-connected system and when alternating current (AC) rather than direct current (DC) is required; wiring; and mounting hardware or a framework.

The strength of the solar energy (radiation) available depends on the time of year, the time of day, and the latitude of the generation point. The amount of energy generated can be further affected by the amount of dust and water vapour in the air, the amount of cloud cover and any shading on the solar panels and the quality of the solar modules.

A rooftop solar PV system can only produce electricity if there is sunlight. This means that it can produce electricity on cloudy days as well provided sunlight is available. However, at night time, when there is no sun light, your solar system will not generate any electricity.

Nearly all buildings have a roof that faces a suitable direction. Ideally south facing roofs are the best but systems can also be fitted on an east or west facing roofs. If there are no suitable roofs available, a system can be fitted on a floor. The solar panels will stand like a frame in the open area available.

Solar PV system can be used to power your entire establishment’s electrical systems, including lights, fans, ACs, cooling systems, and appliances.

A typical domestic solar installation of capacity 3-4 kWp will take place over three to four days for tenement house with two floors.

People often ask whether there is a new breakthrough on the horizon so that they hold-down the installation for the most modern system. In reality, over the last 18 years in business it has been found that technology moves slowly and breakthroughs in the lab rarely translate to practical solutions for people's homes or businesses.

That said, if you have heard about something new that sounds interesting to you please let us know - our technology experts are always interested in discussing the latest entrants to the market.


System Design & Performance

PV is short for photovoltaic, pronounced fotovoltayik, which comes from Latin: photo (meaning light) + voltaic (meaning energy).

Solar PV generates electricity from daylight. With more radiance falling on the PV, more energy is produce

Watts are the units used to measure power used or produced and a kilowatt is a 1000 watts.

kWp stands for kilowatt peak, which is the power that a solar panel will produce if it has ideal conditions.

kWh stands for kilowatt hour, which is number of kW (kilowatts) produced in one hour.

The AC power output of a solar array, measured in watts (W) or kilowatts (kW), is typically given on inverter output displays or remote monitoring sites. It is an instantaneous measurement, determined by the rated DC power output of the solar array, inverter efficiency and system losses, and is proportional to solar irradiance on the array.

The AC energy production of a solar array, measured in kilowatt hours (kWh), is measured over periods of months and years to compare with sizing and long-term performance expectations. Solar kWh energy production is also typically given on inverter output displays or remote monitoring sites, and can be compared with a household’s total kWh electricity consumption, as seen on a utility bill.

Note: For grid-connected PV systems, power generated by the solar PV system will first offset any electrical loads in the house, reducing the number of kWh purchased from the utility.

Net-meter (bi-directional meter) is having the provision to record energy imported from the grid to meet the load and energy exported to the grid after self- consumption. Both energy import and export are recorded in the net-meter. The difference between Export and Import readings is the actual energy consumed/delivered. The Net Meter records surplus energy exported to grid. When your system generates less energy than your consuming load, the meter records energy imported from grid.

The number of solar panels required will depend on how much electricity you consume, what percentage of this electricity is offset, the available “solar resource” at your site and what are the government policy and regulation for maximum installation.

For example, a 5 kW system in New Delhi would produce approximately 7,500 kwh per year, assuming an 84% derating factor (a good derating factor to use for a solar PV system with no shading), an array tilt of 15 degrees, and a due south array orientation. This system would save approximately Rs 50,625 per year in energy costs assuming at Rs 6.75/kWh average cost of electricity. Go to AHA Solar Calculator on this website or use AHA Solar APP and adjust the values based on the specifics of your site to find out how many solar panels are required to reach your desired annual production.

A great resource for determining system size, annual production, and providing a rough estimate of system cost and savings for your given location is the AHA Rooftop Solar Helper’s Solar PV Calculator.

For every kW peak PV system installed on a South facing roof, the Solar PV system will generate 4.5-5 units per day depending on numerous factors. However, the energy generation depends upon the weather conditions and reduces by around 20% for an East or West facing roof.

Solar panels will typically operate at 75-85% of nameplate DC power rating, even in weather conditions that might be considered “ideal”. The nameplate rating of a solar panel is a DC rating measured under factory conditions (cell temperature of 77°F and “perfect sun” conditions of 1000 W/m2). The power output reading seen on an inverter is an AC rating; factors such as DC to AC conversion losses, wiring losses, temperature losses, losses due to shading and dust buildup, and losses due to non-optimal tilt and orientation on the array will affect the instantaneous power output and cumulative energy production of the solar array.

In basic terms, shading is anathema to a PV array - it should be avoided wherever and however possible, before looking at how to manage it. Technologies, which include bypass diodes, have reduced the effect of shading in recent years, but the principal is still to avoid wherever possible.

Inverters with Multiple Power Point Trackers (MPPT) can deal with two (or more) strings of panels in series as separate items, and therefore one shaded string need not affect another which is not shaded.

In a string of panels, shading can be described in simple terms as being analogous to a torch with a series of batteries in it - we all know that if you have a torch with one new battery and two old ones, the overall performance is only as good as the lowest common denominator- the same is true for a PV string. So, if a tree, building or landscape feature shades on part of an array, it will certainly affect the rest of that string at least.

We perform a shade analysis as part of our survey, and our either one of our surveyors, or a member of our technical design department can model the potential output for you to check if the array is worth installing.

Solar thermal uses the heat of the sun to warm water which can be used to in radiators or directly in a bath or shower. Solar power uses solar PV cells to convert solar heat energy into electricity to power electrical appliances.


Installation & Maintenance

For a free solar consultation, enter your location in AHA Solar APP to get started. We will collect some basic information and connect you to an Authorized AHA Rooftop Solar Helper Installer in your area.

No! It is not recommended. The process requires both licensed electrical and roofing skills to ensure the solar power system is safe and optimally designed for 25+ years of production.

With proper design and installation following industry best practices, your roof should maintain all its pre-solar integrity. MNRE Authorized Installers performs best practices so that you can rest easy knowing that your roof will be okay. Be sure to ask your installer about any guarantees they offer on their installation quality.

With limited maintenance, your solar system will operate at peak performance for many years. Cleaning intervals will vary depending on site-specific factors such as annual rainfall, roof tilt (some arrays mounted at steep tilt angles in locations with hard rains will somewhat self-clean), and proximity of factors causing dust or debris on the array (such as trees or a frequently-traveled dirt road). On an average once in a month cleaning of solar PV modules can be done.

It is best to consult your solar installer for a recommended cleaning schedule. AHA Rooftop Solar Helper recommends annual servicing to inspect electrical and mechanical connections for cleanliness, tightness, possible damage, and to ensure that the PV system is operating properly.

Yes. A general rule of thumb is that if you can clearly see your solar panels, they can produce electricity. In fact, given equal sunlight, a solar panel on a cold day will out-produce a solar panel on a hot day.

Most of the reputed solar PV panels can withstand high wind and dust loads. In locations with high wind, your installer will work with a licensed engineer to properly design the solar panel mounting system.


Warranty

Yes. The solar panel warranty is linked to the serial number of the solar panel itself, not the original purchaser, so there is no need to transfer the warranty when buying or selling a home. However, in order for the solar panel warranty to be valid, the solar panels must be installed according to manufacturer installation instructions.

If you suspect that there’s a problem with your solar PV system, the best first step is to contact the solar installation company who originally installed the system through AHA Solar APP. They will be the most qualified to troubleshoot the PV system problem, and contact the manufacturer of the equipment that may be malfunctioning.


Off-Grid & Hybrid Applications

For the safety of workers attempting to fix power outages, solar PV systems that are connected to the electrical grid are required by utility regulations to shut off during blackouts or shutdowns.

AHA Rooftop Solar Helper recommends battery backup or traditional generators in places where blackouts occur regularly

Yes, provided you install optional battery-backup systems to provide power when your demands exceed your production, such as at night. While a Solar installer can help you install such a system, it is not typically recommended for several reasons. First, batteries add significant costs to your system, extending your payback period. Second, you may not be eligible for some incentives if you do not connect your system to your utility. Lastly, staying connected to the grid ensures you will rarely ever be without power, unlike batteries that have a limited lifespan and storage capacity.


Environment

For the safety of workers attempting to fix power outages, solar PV systems that are connected to the electrical grid are required by utility regulations to shut off during blackouts or shutdowns.

AHA Rooftop Solar Helper recommends battery backup or traditional generators in places where blackouts occur regularly

Yes, provided you install optional battery-backup systems to provide power when your demands exceed your production, such as at night. While a Solar installer can help you install such a system, it is not typically recommended for several reasons. First, batteries add significant costs to your system, extending your payback period. Second, you may not be eligible for some incentives if you do not connect your system to your utility. Lastly, staying connected to the grid ensures you will rarely ever be without power, unlike batteries that have a limited lifespan and storage capacity.

Yes, provided you install optional battery-backup systems to provide power when your demands exceed your production, such as at night. While a Solar installer can help you install such a system, it is not typically recommended for several reasons. First, batteries add significant costs to your system, extending your payback period. Second, you may not be eligible for some incentives if you do not connect your system to your utility. Lastly, staying connected to the grid ensures you will rarely ever be without power, unlike batteries that have a limited lifespan and storage capacity.


FAQ about AHA Rooftop Solar Helper APP

AHA App is currently available only of Android and can be downloaded from Google Play Store. The App will be available on iOS and Windows shortly.

Android App

Any person can become a registered user by providing some credentials, usually in the form of a Username (or email), mobile number and password. After that, one can access information and privileges unavailable to non-registered users, usually referred to simply as guests. The action of providing the proper credentials for AHA platform is called logging in, or signing in.

Access to all web and mobile app is provide by one account.

The only person who owns your files and other account data is you. You are free to have access to all data and use it in any way you want at any time. In the meantime, we host it for you in the cloud.

Basic Version:
It means the basic version of the AHA mobile application where the User has limited access. It will be free of cost and the major function of this version shall be to do preliminary solar estimation using solar calculator which includes determining approximate capacity of the solar PV system, benefits and savings. It will also provide the list of the most appropriate solar installers for the User.

Professional Version:
It means the advanced version of the AHA mobile application where the User has access to more features than the User of Basic Version. This version is mainly for solar professionals, solar PV installers, vendors, EPC Contractors. This version is available on chargeable basis as per the terms and condition of the Pricing Policy applicable as on date. It will have additional features to accept queries generated by Roof-Owners; to do detailed site surveys, project monitoring and creating new projects. It also helps the User to generate a detailed report and proposals for its customers and acts as a Project Management Tool to monitor the progress of the project by the team.


Design

Google maps are currently the most reliable and updated source for project development on a map. In case some regions are not updated or accurate, you can always use sketch design tool and insert the necessary dimensions.

Values of irradiation in AHA Rooftop Solar Helper app are based on NASA data of irradiation provided by Ministry of New and Renewable Energy and are different for each location.