Go to the previous page
All posts
Residential
5 min read

1 kW Rooftop Solar Plant Price in India, 2025

Published on
November 19, 2024
Author
Subscribe to newsletter
By subscribing you agree to with our Privacy Policy.
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Share this post

A 1-kW solar rooftop plant is the minimum size of solar plant that can be installed under Net Metering. 1kW is usually sufficient for an average household and where the rooftop area is also limited. To install a 1-kW system, you will need less than 8 square meters (approximately 86 square feet) of shadow-free area.

Let us understand the number of solar panels required for 1 kW plant. Considering a 540Wp monocrystalline solar panel, we will need 2 panels, which makes our DC capacity 1080 Wp or 1.08 kWp. In case of smaller panels of rating say 450Wp, you will need 3 panels to make the capacity of 1350Wp or 1.35kWp.

A solar panel is made of 72 cells or 144 half cut cells made of silicon arranged in series and parallel combination and connected via silver ribbons.

Monocrystalline Technology: Each cell in these panels is made up of a single silicon crystal and is more efficient as compared to the polycrystalline and thin film cells.

A 540Wp rated solar panel will generate a maximum power of 540W at peak hours.

Also, it is important to note that this is the maximum output that the plant can provide during peak hours, the output will vary as per the irradiation during the day.

So, for a 1.08 kWp plant, a 1-kWinverter is recommended. It is more likely that you might have a single-phase connection, in that case your EPC company will suggest a 1 kW single phase inverter.

What appliances can a 1kWp rooftop solar plant support?

Since we are suggesting an On-Grid system, all your appliances can run simultaneously without any trouble. As the name says, the On-Grid system is connected to the grid i.e. your electricity supplier, hence the system can take the entire connected load.

How does the 1kWp rooftop On-Grid solar plant support all the household appliances?

A grid-connected rooftop solar plant is connected to your main distribution board and relies on the grid for voltage reference to synchronize the inverter. This synchronization ensures the generated electricity matches the grid's frequency (50Hz in India) and voltage, allowing safe power supply to appliances. This means, the appliances in the house have access to electricity from the solar plant as well as the grid. Hence, you can run your appliances simultaneously as well, say television and any other appliance like washing machine along with the lights and fans.

If the rooftop solar power plant is unable to suffice the demand say due to cloudy weather or at night, the electricity is supplied from the grid and when the generation from the solar power plant exceeds the consumption, the units are exported to the grid. This mechanism of importing and exporting electricity is possible under the Net-Metering mechanism.

What are the Components required in a 1kW rooftop solar plant?

Solar panels

Preferably =>540Wp monocrystalline solar panel from a tier-1 manufacturer. 10 Year Product Warranty and 25 years Power output - as per OEM

Inverter

High-efficiency inverter from a reputed brand with a minimum of 7 years of warranty.

Module (Panel) Mounting Structure

Fixed Tilt structure made of Hot-dipped Galvanized Iron (HDGI) for RCC roofs and Anodized Aluminium in case of metal shed rooftop.

ACDB-DCDB, AC and DC cables, Chemical maintenance free earthing set with LA & Generation Meter, Net meter, and other miscellaneous equipment.

As a solar rooftop plant is an asset designed to last for 25 years, kindly ensure all equipments are of standard quality from reputed manufacturers.

Pricing

A 1-kW rooftop solar plant can cost you somewhere between Rs. 70,000- 80,000. The prices may vary depending on the type and rating of solar panel used, solar module mounting structure used and, any other additions.

Subsidy

The PM – Surya Ghar: Muft Bijli Yojana offers subsidy to residential rooftop owners to install rooftop solar plants. Here is how the subsidy will work

  • Rs. 30,000/- per kW up to 2 kW
  • Rs. 18,000/- per kW for additional capacity upto 3 kW
  • Total Subsidy for systems larger than 3 kW capped at Rs 78,000

Here In the case of a 1kW system, you can expect a subsidy of Rs. 30,000/- from the central government.

For subsidy, the consumer will have to log on to the National portal i.e. https://pmsuryaghar.gov.in and fill in the required details and upload the necessary documents. Once the rooftop solar plant is commissioned and the DISCOM approves all the documents, the subsidy will be deposited to the consumer’s bank account which was filled during the submission of the form.

For commercial and industrial consumers, subsidies are not applicable.

Financing options: There are banks and financing institutions that offer collateral-free loans for up to 90%of the project cost. Also, it is possible to take a loan even if you are opting for a subsidy. Hence, the upfront capital is not a major concern to install a rooftop solar plant.

How many units does a 1kW rooftop solar plant generate?

While generation varies as per location, tilt angle and orientation of the solar panel, etc. one can expect a 1kWp rooftop solar plant to generate ~120 units/month or ~1440 units/year.

How much will the electricity bill be reduced after installing the rooftop solar plant?

While the reduction in bill depends on your consumption, we can estimate savings based on solar generation. Considering an average tariff of Rs.5/kWh for a residential consumer, One can expect a saving of ~Rs.600/month considering an average generation of 120 units/month. In most cases, the electricity bill will be reduced to zero. However, fixed charges based on the contract demand will be still applicable.

What is the timeline to install a 1kW rooftop solar plant?

Once all the components are delivered to the site, the rooftop solar plant should ideally be installed in 1-2 days, as it involves only 2-3 panels. In case of a quick and efficient installer, installation can be finished in few hours. However, the solar plant’s commissioning (i.e. the day you can realistically start using solar power) entirely depends on the net-metering approvals from the DISCOM might take 15-20 days.

Can I increase the size of the rooftop solar plant in the future?

The capacity of the rooftop solar plant is based on 3 factors:

  1. Electricity consumption
  2. Rooftop space available
  3. Sanctioned load

You can increase the size of the plant in the future if:

  • If your consumption has increased and you need more than 120 units in a month, capacity.
  • If you have enough rooftop space to accommodate another 2-3kW
  • If the sanctioned load is more than 1kW, if not you can apply for loan enhancement with the electricity supplier/DISCOM.

Having said that, if you have adequate space and sanctioned load, it’s wise to opt fora larger system, such as 2-3 kW (depending on your consumption), right from the start, rather than increasing the size later on.

Expanding the rooftop solar plant will require either adding a new inverter or replacing the existing one, along with other components like structures and cables. Choosing a larger system initially is usually more cost-effective than scaling up later. Additionally, keep in mind that the subsidy can only be claimed once. So, if you plan to add more rooms or appliances in the near future, consider investing in a higher capacity system upfront.

Is it difficult to maintain a 1-kW rooftop solar plant?

Rooftop solar plants generally require minimum maintenance. Ideally, the EPC company should provide 1-year of AMC with quarterly technical visits and any emergency visit in case of a breakdown. Apart from this bi-monthly or monthly cleaning of solar panels with water is recommended to clean dust, and dirt deposited on the panels.

And what about Hybrid and Off-Grid systems? Should we consider them while finalizing our rooftop solar plant? And what is the price in both cases?

We would always recommend an On-Grid system considering the affordability and no hassle subsidy, especially if the rooftop solar plant is to be installed in areas with minimal or no power cuts.

Let us briefly understand both cases:

Hybrid: This is a great solution when there are frequent power cuts, this ensures a reliable supply of electricity. Subsidy can be availed in case of Hybrid systems as well, but it will be subject to approval by the respective Electricity Regulatory Commissions. A typical Hybrid 1 kW rooftop system can cost around Rs. 1,20,000-1,50,000 and a maximum subsidy of Rs. 30,000 can be considered for it.

Off-grid System: This system is only recommended where there is absolutely no access to electricity say in a remote hill station/town. Although with an off-grid system, you won’t be able to opt for subsidy. A 1 kW Off-grid system can cost you around Rs. 80,000-90,000 and can vary depending on the load.

We hope this article clarifies your questions about a 1-kW rooftop solar plant. You can write to us connect@aerem.co for any questions and queries about rooftop solar installation and solar finance needs.

Blog

Our latest blogs

Businesses

How Much Does Solar Panel Installation Cost in India 2025

Looking for affordable solar panel installation? Get a detailed guide on installation, key components, total costs, and additional charges. Get a free quote now!
Businesses

Types of Solar Panels 2025: Cost, Efficiency & Lifespan

Learn about the different types of solar panels and how to select the best quality like cost, efficiency & life span. Learn more now to make an informed choice!
Businesses

Solar for Green Hydrogen: Is It Truly Feasible?

Can solar energy make green hydrogen truly sustainable and scalable? Explore the potential and challenges in this deep-dive article.
Solar Installers

Solar Rooftop Project Permits & Regulations: Key Guidelines

The installation of solar power plants must comply with specific guidelines and regulations set forth by the Ministry of New and Renewable Energy (MNRE) and the local Electricity Distribution Companies (DISCOMs). These guidelines are established to ensure that solar installations maintain high standards of quality and reliability. Compliance includes meeting technical specifications, safety protocols, and performance benchmarks. By adhering to these regulations, rooftop solar plants can contribute effectively to the grid while ensuring they operate safely and efficiently.

Solar Design Fundamentals for Installation

Learn the essential Solar Design Installation fundamentals to ensure a successful solar system setup. Discover key factors, best practices, and expert tips for efficient solar design and installation.
Solar Installers

How to Install Solar Panels: Step-by-Step Guide

Discover how to install solar panels the right way. Follow this simple, step-by-step guide to make your solar journey smooth, efficient, and cost-effective.
Businesses

Green Energy Open Access: Empowering Indian Businesses

Discover how India's Green Energy Open Access policy enables businesses to access affordable renewable power. Learn the benefits and eligibility criteria.
Businesses

Rooftop Solar Potential of India in 2025

Solar rooftop potential is based on a rooftop's size, shading, tilt, and location. As of 2024, India’s renewable capacity exceeds 200 GW, with solar leading at 94.17 GW.
Solar Installers

Solar Site Assessment Guide for EPCs

Learn the key steps of site assessment for solar EPCs. Discover how to avoid costly mistakes & ensure optimal plant performance from day one.
Businesses

Rooftop Solar vs Stock Market: Where Should You Invest?

Is solar a better long-term bet than stocks? Discover how rooftop solar stacks up against market returns and which investment wins in the long run.
SolarTech

Solar Monitoring & Maintenance: Why Critical for Performance

The reason being monitoring is like the pre-requisite to a subject or a topic you are studying. If monitoring is performed well, maintenance becomes much easier and more efficient. Let’s dive in to understand how monitoring is performed in the case of rooftop solar plants.
Businesses

Rooftop Solar Subsidy & Policy in Gujrat 2025

Gujarat’s solar growth is driven by the Surya Gujarat scheme, offering 40% subsidies on systems up to 3 kW. Understand more about solar subsidies in Gujarat today.
Businesses

UP Rooftop Solar: Subsidy Benefits & How to Apply

Explore how homeowners in UP can claim rooftop solar subsidies, reduce bills, and power their homes sustainably. Step-by-step guide inside
Residential

1 kW Rooftop Solar Plant Price in India, 2025

1 kW Solar Rooftop Plant: Minimum Size for Net Metering and Ideal for Average Households. Learn how much space and cost are required for installation.
Residential

5kW Rooftop Solar Plant Price in India, 2025

Discover the 5kW Rooftop Solar Plant Price in India, 2025 with Aerem Solutions. Get insights on installation costs, savings, and benefits of solar energy for your home or business.
Solar Installers

Rooftop Solar Mounting Structures: Types, Benefits & Uses

Rooftop Solar Mounting Structures play a crucial role in solar panel performance. Discover their types, benefits, and best applications for maximum efficiency.
Residential

Rooftop Solar Plant Design: Integrating Aesthetic & Functionality

Make your solar plant a money-saving, eco-friendly asset by integrating it into your building design. Elevate panels to create a gazebo-like space. Explore today!
Solar Installers

Best Solar Design Software Tools & benefit  

Explore solar design software tools for PV plant capacity, shadow analysis, system orientation, panel inverter, financial analysis, energy consumption, and more.
Solar Installers

Maximizing Rooftop Solar Plant Efficiency: Design Tips & Insights

Unlock higher solar output with expert tips on orientation, tilt & shadow analysis. Discover how to design smarter rooftop plants that perform at their peak.
Businesses

Types of Solar Installation Models | Why CAPEX is Best for MSMEs

Types of solar modules & CAPEX Solar Installation for MSMEs: Why It's the Best Option for Reducing Costs and Increasing Energy Savings. Discover different solar models and their benefits for your business.
Businesses

Empowering Solar EPCs: Aerem’s All-in-One Services

Discover how Aerem supports Solar EPCs with financing, design, procurement & more. A complete ecosystem to help you grow faster. Learn how inside!
Solar Installers

How Aerem Empowers Solar EPCs with Complete Solar Services

From offering collateral-free solar loans that make installations more accessible to providing a seamless procurement experience through SunStore, Aerem supports every aspect of your business. Our supply chain finance options ...
Businesses

10 Reasons MSMEs Should Install Rooftop Solar

Rooftop Solar for MSMEs: 10 Compelling Reasons to Install. Learn how solar energy reduces costs, boosts sustainability, and improves business efficiency in this in-depth guide.
Businesses

Solar Loan: Complete Guide for MSMEs & Businesses

Aerem Solar Loan Guide for MSMEs: Finance Your Solar Installation and Save Costs. Discover how businesses can benefit from solar loans with our comprehensive guide.
Businesses

5 Benefits of Solar Loans

Solar Loans Benefits: Top 5 Reasons to Choose Aerem Solutions. Learn how financing your solar project reduces costs, increases savings, and promotes sustainability.
Businesses

How to evaluate solar rooftop EPC quotations

Evaluate solar rooftop EPC quotations carefully, considering offerings, pricing, reputation, and delivery time to choose the right company for your installation.
SolarTech

Rooftop Solar Glossary: Key Terms Simplified

Confused by solar jargon? Our glossary breaks down essential rooftop solar terms, making it easy to understand and invest in solar energy.
SolarTech

Get Your Solar Rooftop Monsoon-Ready | Expert Tips

Worried about your solar plant this monsoon? Discover smart, actionable tips to safeguard performance & avoid costly damage.
Residential

Flat vs. Reducing Solar Loan Rates: What Saves More?

​Explore how flat and reducing interest rates impact your solar loan. Learn which option offers better savings for your investment.​
Businesses

Lower Scope 2 Emissions & Save with Solar Power

Cut energy costs and Scope 2 emissions with rooftop solar. A smart move for a sustainable and efficient business.
SolarTech

Solar Power Plant: Components, Types & Benefits

Discover essential Solar Power Plant Components, their types, and key benefits. Learn how they work to maximize efficiency and savings. Explore now!
Businesses

How to Estimate the Right Solar Installation Capacity ?

Optimize your Solar Installation Capacity with the right calculations and expert insights. Maximize energy savings and efficiency. Read our guide today!
Businesses

Optimize PR & CUF to Boost Solar Efficiency for Peak Performance

Boost Solar Efficiency: Optimize PR and CUF for Peak Performance. Explore proven strategies to maximize your solar system's energy output and ensure long-term success.

Realise your solar potential with Aerem

We understand the unique challenges that India faces when it comes to adopting solar. Our platform is tailored to propel your business with the power of solar, setting the stage for unparalleled growth. Dive into tools, financing and SaaS systems that echo your ambitions