solar rooftop system price

Here for the Solar Rooftop System Price? The cost of a rooftop solar PV system depends on the function it serves (to feed power into the grid, to support the load during a power failure, etc.) and incentives/subsidies available. It should be noted that all solar PV systems function by matching the voltage from some other source. Therefore the system has to be integrated with the grid, a battery backup, or a diesel generator.

Types of rooftop solar PV systems

Solar Power Plant – Rooftop, Captive Solar Assistance Rooftop solar PV systems are of 3 types:

Grid-tied – These systems are designed to work with the grid alone. Thus, it is a combination of solar PV and grid. As these systems depend on the reference voltage provided by the grid for their operations, grid-tied systems do not work when the grid is down.

Grid-interactive – This system works in conjunction with either a battery backup or diesel generator to support the load even during a power failure.

Off-grid – Off-grid systems are designed to operate independent of the grid, these systems sync with a diesel generator and/or batteries. Battery based systems used to be of smaller capacity due to the cost involved, but the rising cost of other power sources, and the lack of power at any cost has seen a steady increase in battery based system sizes The difference between the systems lies in the kind of inverter used, and the inclusion of batteries. As various vendors use different terminology for these systems we urge you to verify the functions of the offered system rather than going by the name alone.

f you looking for the installation of solar panels on your roof and wondering how much it will cost and how much savings you can have on your monthly electricity bill, then you are in the right place. People ask this question quite often and most of the cases this is the first question people ask. Here, I have tried to address this important questions without going into any technical details.The cost of rooftop solar system depends on the system size (1 kW, 25 kW, 100 kW etc), system type (on-grid, off-grid, hybrid etc), autonomy needed (1 Hr, 4 Hr, 24 Hr etc), location and also on the quality of the products and services.A comprehensive summary of various types of solar systems along with the cost is given here for you convenience. The pice is inclusive of GST. Please do not hesitate to drop a comment in the comment section at the bottom if you have any specific queries/comments/suggestions.

On-Grid Rooftop Solar System

Where To Use: Power cut is less than 2 Hr a day on average, peak load is 5 kVA or more, want to reduce electricity bill. Suitable for residential, commercial and industrial purpose where the electricity consumption is above 500 Units (kWh) per month. 

Solar Rooftop System Price

System SizeSystem CostCost/Watt
1 kWRs 74,000Rs 74
5 kWRs 3,62,000Rs 72
10 kWRs 5,76,000Rs 58
15 kWRs 8,54,000Rs 57
20 kWRs 11,04,000Rs 55
25 kWRs 13,55,000Rs 54
50 kWRs 24,75,000Rs 49
100 kWRs 49,64,000Rs 49
250 kWRs 1,21,17,000Rs 48
500 kWRs 2,37,14,000Rs 47
1000 kWRs 4,70,39,000Rs 47

Off-Grid Rooftop Solar System

Where To Use: Where grid electricity is not available and the peak load is less or around 5 kVA. Generally remote area or places where grid connection is not feasible.

System SizeSystem CostCost/Watt
1 kWRs 1,36,000Rs 136
2 kWRs 2,67,000Rs 133
3 kWRs 3,94,000Rs 131
4 kWRs 5,04,000Rs 126
5 kWRs 6,44,000Rs 129
6 kWRs 7,57,000Rs 126
7 kWRs 8,69,000Rs 124
8 kWRs 9,79,000Rs 122
9 kWRs 11,04,000Rs 123
10 kWRs 11,95,000Rs 120

Hybrid Rooftop Solar System

Where To Use: Frequent power cut, peak load is less or around 5 kVA, daytime consumption is high etc.  Suitable for normal household and places where electricity consumption is less or around 500 Units (kWh) per month.

System SizeSystem CostCost/Watt
1 kWRs 88,000Rs 88
2 kWRs 1,70,000Rs 85
3 kWRs 2,49,000Rs 83
4 kWRs 3,10,000Rs 78
5 kWRs 4,01,000Rs 80
6 kWRs 4,66,000Rs 78
7 kWRs 5,29,000Rs 76
8 kWRs 5,90,000Rs 74
9 kWRs 6,67,000Rs 74
10 kWRs 7,85,000Rs 78

What is solar power and why should you consider it?

Solar power systems are also called solar photovoltaic (PV) systems. They work by collecting solar energy in solar panels which are normally roof-mounted, but can be mounted on the ground. The solar energy collected is converted into alternate current (AC) with an inverter. While solar panels will only work during the daytime, battery storage units are available that allow the excess power to be used at night.


Solar power has been through three stages. Until about 2011, solar panels were expensive and the payback period was longer. After 2011, they started coming down in price and today, the price of solar panels has stabilised and is far more affordable than in the past.

Solar panels have also improved in efficiency and reliability. In the past, solar panels were expensive and most homeowners bought smaller systems up to 2kW. Today, a 5kW system is about the same price as a 2kW system was before 2011 and is a better system to have because it can account for most if not all of your energy requirements. To know more about what is solar energy read this.

How much does solar power cost?*

Today, the average cost of a 5kW system is around $6500, but it can be more expensive in some areas.  For example, in Darwin, a 5kW system costs around $11,000 while in Adelaide, it costs under $6000. In Sydney and Perth, solar power costs just over $5000 and in other states, it costs around $6000.

When you consider buying a 5kW solar system, you also need to think about the payback period. Average payback periods in different cities are around:

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  • 4.2 years in Adelaide
  • 4.7 years in Darwin
  • 4.8 years in Sydney and Perth
  • 5.4 years in Brisbane
  • 6.4 years in Canberra
  • 7.4 years in Melbourne
  • 8.2 years in Hobart

These figures take into account the cost of electricity in different areas and that is why Darwin, which has the highest costs has a low payback period. The average payback period in Australia is 5.8 years, but even at the highest payback period of 8.2 years in Hobart, solar panels are well worth investing in. It’s also worth noting that electricity prices rise steadily, so the payback period could even be shorter.

Estimates of households in Australia that already have solar power range from 1.5 million to 2.0 million. This number will probably increase in the future as the cost of electricity rises.

Many solar panels have warranty periods of up to 25 years, making them a wise investment considering their payback period of just 5.8 years on average.

How to get the right sized solar system

Solar panel systems are made up of several panels and the size of the system is based on the number of panels and the efficiency of the panels. Estimates vary because solar panels can be installed in areas where the sun rarely shines or in sunny areas. Solar panels can also be installed on roofs that have partial shade during the day, which decreases their efficiency. These are averages and your solar power installer can tell you how efficient your solar power will be in your area.

Solar power is measured in “self-consumption” which is an indication of how much energy you use during the day. These are some estimates of how much energy you will save for different energy consumption levels with a 5kW to 10kW system measured in kilowatt hours (KWh):

  • 5-10KWh will save 30 percent
  • 11-15KWh will save 48 percent
  • 21-25KWh will save 66 oercent
  • 31-40KWh will save up to 82 percent

It is possible to get a solar system that is too large for your household, but you don’t want to get a system that is too small for your household. Solar power retailers and installers can help you find the perfect system for your needs and a smaller system for a smaller household will cost less than a larger system.

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Why investing in a solar system battery is a good idea

The prices above are for solar panels only and a battery will cost more. A battery is a good investment because you are likely to be able to store energy in the battery during the day and have it to use at night. This will decrease your use of electricity from the grid and lower your electricity bills.

Solar batteries are a good choice, but you don’t want to buy a solar battery that is too small or too large for your solar panels. Sizing of batteries is based on average electricity usage and the size of the solar system you have. Batteries don’t just store enough energy to keep your house powered overnight. If you get the right sized battery it can give you “energy autonomy” for three to five days.


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Solar batteries cost between $2000 and $12,000, with the higher cost being batteries for large systems and a large battery can weigh up to 290kg while a smaller battery may weigh only 25 to 45kg. Even at the higher end of the scale, batteries have a payback period of three to five years and their warranties are far longer than their payback periods. Better batteries have a 10 year warranty and others may have a seven year warranty. Even at seven years, you still save money since the payback period is five years maximum.

It’s probably a good idea to buy lithium batteries because lithium batteries generally have 10 year warranties and are highly effective. They aren’t hard to find because about 80 percent of solar batteries on the market are lithium batteries.

Batteries with inverters and chargers can be more expensive than batteries only. A battery for an 8kW system may cost around $7700 while the same sized battery with an inverter/charger may cost around $11,800. These prices include the battery and installation costs. Most households don’t require an 8kW system, but this is an indication of the price differences. The key thing also to remember is to know how to keep solar panels clean to make them last. 

Choosing a solar panel supplier and installer

While state rebates have been phased out, government rebates are still available. “Rebates” take the form of Small Scale Technology Certificates (STCs) which vary in price depending on market conditions and other factors. In order to qualify for STCs, you must buy solar panels and batteries from a certified retailer who will offer a discount for the price of the STCs. This discount can be from $500 to $1000 depending on the system you buy and can represent a substantial savings.


Finding a certified solar panel supplier is fairly easy because most solar panel suppliers are certified. However, they also sell different products and you want to find good solar panels and batteries with long warranty periods.

It’s always best to get quotes from three solar panel suppliers and compare their services and products. They will give you supply and installation costs as well as the discount for STCs. Compare the prices carefully and choose a high quality system at the right price. Some other things to look for are:

  • Solar installers must be licensed
  • They should be fully insured
  • They should give you itemised quotes
  • Their warranty periods should be stated
  • Their products must meet Australian Standards

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