If you are considering solar panel installation in Bihar, one of the first questions is usually: How much does a solar panel system cost in Bihar in 2026?

The answer depends on the system capacity, panel and inverter technology, installation requirements, mounting structure, electrical work, warranty, and whether you choose an on-grid, off-grid, or hybrid system.

For a typical residential rooftop solar project, current 2026 market listings indicate that an installed on-grid system can vary considerably by equipment and installer. As a practical planning range, homeowners may encounter approximately ₹60,000–₹80,000 per kW for an all-inclusive system, although actual quotations can be lower or higher depending on specifications and project conditions. Recent Bihar market listings show 3 kW systems around ₹1.8–₹2.2 lakh and 5 kW systems around ₹3–₹3.8 lakh, while other installers advertise different package prices.

The good news is that eligible residential consumers can reduce their upfront investment through the PM Surya Ghar Muft Bijli Yojana, which currently provides Central Financial Assistance of up to ₹78,000 for eligible rooftop solar systems of 3 kW or more.

This guide explains the expected solar panel cost in Bihar, subsidy, installation expenses, system-wise pricing, and the factors you should consider before choosing a solar company.

What Is the Average Solar System Cost in Bihar in 2026?

There is no single fixed retail price for a solar system in Bihar.

For residential on-grid systems, a reasonable 2026 planning range is:

System Size	Indicative Gross Cost*	PM Surya Ghar CFA	Indicative Cost After CFA*
1 kW	₹60,000–₹80,000	₹30,000	₹30,000–₹50,000
2 kW	₹1.20–₹1.60 lakh	₹60,000	₹60,000–₹1.00 lakh
3 kW	₹1.60–₹2.20 lakh	₹78,000	₹82,000–₹1.42 lakh
5 kW	₹2.50–₹3.80 lakh	₹78,000	₹1.72–₹3.02 lakh
10 kW	₹5.00–₹7.00 lakh+	₹78,000*	₹4.22–₹6.22 lakh+

*These are indicative market ranges, not government-fixed prices. Actual quotations vary by equipment, installer, roof conditions, electrical work and other project requirements. Current Bihar market listings show significant variation between vendors.

The subsidy figures are based on the current PM Surya Ghar structure. The central subsidy is ₹30,000 per kW for the first 2 kW and ₹18,000 for the additional 1 kW, with the total capped at ₹78,000.

How Much Does a 1kW Solar System Cost in Bihar?

A 1 kW residential solar system may cost approximately ₹60,000–₹80,000 before subsidy, depending on the equipment and installation package.

Under the current PM Surya Ghar structure, an eligible 1 kW residential system can receive ₹30,000 in central subsidy.

A 1 kW system may be suitable for a smaller household with relatively low electricity consumption. However, choosing the system size only according to the subsidy is not recommended.

Your electricity bill and daily consumption should be assessed first.

What Is the Cost of a 2kW Solar System in Bihar?

A 2 kW system may cost approximately ₹1.20 lakh to ₹1.60 lakh before applicable subsidy, depending on the equipment and installation scope.

The current central subsidy for an eligible 2 kW residential system is ₹60,000.

Therefore, the indicative balance after subsidy could be around ₹60,000–₹1 lakh, before considering any project-specific charges that may not be included in the advertised package.

How Much Does a 3kW Solar System Cost in Bihar?

A 3kW solar system price in Bihar can vary substantially depending on the brand, inverter, structure and installation package.

Current market listings show 3 kW residential systems in the broad range of approximately ₹1.6 lakh to ₹2.2 lakh before subsidy. Some vendors advertise lower or higher package prices, which demonstrates why homeowners should compare detailed quotations rather than relying on a single advertised figure.

The maximum central subsidy for an eligible 3 kW residential rooftop system is ₹78,000.

For example, if a complete system quotation is ₹1.80 lakh:

₹1,80,000 − ₹78,000 = ₹1,02,000

This is only an illustration. Your actual payable amount depends on the final eligible project price and applicable terms.

What Is the Price of a 5kW Solar System in Bihar?

A 5kW solar system price can typically fall around ₹2.5 lakh to ₹3.8 lakh for an installed on-grid system, although equipment selection and installation conditions can move the price outside this range. Current Bihar listings show examples ranging from roughly ₹3 lakh to ₹3.8 lakh, while individual package offers can differ.

The central PM Surya Ghar subsidy remains capped at ₹78,000.

For example:

₹3,00,000 gross cost − ₹78,000 CFA = ₹2,22,000

A 5 kW system may be appropriate for a larger household with higher electricity consumption, but a professional load assessment should determine whether 5 kW is actually necessary.

How Much Does a 10kW Solar System Cost in Bihar?

A 10kW solar system price can be approximately ₹5 lakh to ₹7 lakh or more, depending on equipment, roof structure, electrical requirements and installation complexity.

The central residential PM Surya Ghar subsidy does not continue increasing indefinitely with system capacity. The maximum central CFA under the current structure is ₹78,000.

For a 10 kW system, therefore, the majority of the project cost remains the consumer’s responsibility.

Large systems should be planned according to actual electricity consumption and sanctioned load rather than installed simply to maximize solar generation.

What Is Included in Solar Panel Installation Cost?

When comparing quotations, check whether the price includes the complete system.

A typical rooftop solar package may include:

Solar PV Modules

Panels are responsible for converting sunlight into DC electricity. Their technology, efficiency, warranty and manufacturer can significantly affect the project price.

Solar Inverter

The inverter converts solar-generated DC electricity into usable AC electricity and manages the grid connection in an on-grid system.

Mounting Structure

The structure supports the panels and must be suitable for the roof type and local environmental conditions.

Cables and Protection Equipment

A complete installation generally requires appropriate DC/AC cabling, isolators, protection devices, earthing and related electrical components.

Installation Labour

Installation charges can vary according to roof height, accessibility, structure requirements and electrical complexity.

Monitoring

Modern inverters may provide online monitoring so homeowners can track system performance.

A detailed quotation should clearly state which components are included.

What Factors Affect Solar Panel Cost in Bihar?

Several factors influence the final solar installation cost per kW.

1. System Capacity

Larger systems require more panels, larger inverters, additional structure and more electrical equipment.

2. Panel Technology

Different module technologies and efficiency levels can affect the price.

3. Inverter Type

String inverters, hybrid inverters and other configurations have different prices and applications.

4. Roof Conditions

A simple RCC rooftop may require a different installation approach from a sloping roof or a structurally challenging location.

5. Battery Requirement

An on-grid system normally does not require batteries for ordinary grid-connected operation. A hybrid or off-grid system requires storage, which can significantly increase the project cost.

6. Electrical Work

Additional wiring, earthing, protection equipment, cable runs or electrical upgrades can increase the quotation.

7. Brand and Warranty

Well-established equipment brands and stronger warranty packages may carry a higher initial price but can provide additional assurance.

On-Grid vs Hybrid vs Off-Grid: Which Is More Affordable?

Choosing the right system type is important.

On-Grid Solar

An on-grid system is connected to the electricity grid and is generally the most economical option for homeowners primarily interested in reducing electricity bills.

It normally does not provide backup electricity during a grid outage unless specifically designed with additional backup functionality.

Hybrid Solar

A hybrid system combines solar generation with battery storage. It can provide backup during power interruptions but usually costs considerably more.

Current Bihar package listings show hybrid systems costing substantially more than comparable on-grid systems because of the battery and hybrid inverter.

Off-Grid Solar

An off-grid system operates independently of the electricity grid and normally requires sufficient battery storage. It may be useful where grid connectivity is unavailable or unreliable, but the upfront investment can be higher.

How Does PM Surya Ghar Reduce Solar Installation Cost?

The PM Surya Ghar Muft Bijli Yojana is one of the biggest factors affecting the effective cost of a residential rooftop solar system in Bihar.

The current central assistance structure is:

• 1 kW: ₹30,000
• 2 kW: ₹60,000
• 3 kW: ₹78,000
• Above 3 kW: maximum ₹78,000

The national rooftop solar portal directs consumers to the PM Surya Ghar programme for rooftop solar installation.

The subsidy is not a discount that every seller can independently apply to any solar package. Eligibility and processing are governed by the programme requirements, vendor mechanism, installation and DISCOM verification.

Does Bihar Have a Separate Solar Subsidy?

Homeowners should distinguish between the central PM Surya Ghar CFA and any separate state-level incentive.

Bihar’s renewable-energy agency, BREDA, is the state’s nodal agency for renewable-energy programmes.

However, consumers should not assume that a separate Bihar subsidy automatically applies to their residential rooftop project. Always verify any current state incentive directly through official Bihar government, BREDA, DISCOM or PM Surya Ghar sources before including it in your financial calculation.

How Much Can You Save With Rooftop Solar?

Your actual savings depend on electricity consumption, tariff, system size, solar generation, shading, orientation and metering arrangements.

For example, a household using electricity primarily during daylight hours may directly consume a substantial portion of its solar generation. Surplus generation may be handled according to the applicable grid and metering regulations.

Instead of accepting a generic promise such as “zero electricity bill,” ask the installer for an estimated annual generation and savings calculation based on your actual electricity bills.

How to Choose a Solar Company in Bihar?

The lowest quotation is not necessarily the best quotation.

Before selecting a solar company in Bihar, ask for:

• Complete equipment specifications
• Panel manufacturer and model
• Inverter manufacturer and model
• Mounting structure details
• Warranty information
• Installation scope
• Earthing and protection details
• Net-metering assistance
• Subsidy-process support
• Expected generation estimate
• Written quotation
• After-sales service details

A professional installer should also conduct a site survey before finalizing the system design.

ZRN Solar can help homeowners evaluate rooftop requirements, understand system options and plan solar installation according to their electricity needs.

What Should You Ask Before Getting a Solar Quote?

Ask these questions before signing a contract:

1. Is the quoted price before or after subsidy?
2. Does the price include installation?
3. Which solar panels will be supplied?
4. Which inverter will be installed?
5. Is the mounting structure included?
6. Are earthing and protection devices included?
7. Who handles the DISCOM and metering process?
8. What warranties are provided?
9. What happens if a component fails?
10. Are there additional transportation or civil-work charges?

These questions make it easier to compare two quotations on a like-for-like basis.

Is Solar Worth Installing in Bihar in 2026?

For many homeowners, rooftop solar can make financial sense when the system is correctly sized and professionally installed.

The combination of solar generation and the current residential PM Surya Ghar CFA can reduce the initial investment. Bihar’s continuing rooftop solar expansion also indicates growing activity under the programme. In January 2026, reporting on Bihar DISCOM plans noted a 275 MW rooftop solar tender under PM Surya Ghar, showing continued programme implementation in the state.

However, your financial outcome depends on your individual electricity consumption and project quotation.

The best approach is to compare the gross system price, subsidy, net investment, expected annual generation and estimated savings rather than looking at the panel price alone.

Conclusion

The solar panel system cost in Bihar in 2026 depends on much more than the number of panels. For residential on-grid systems, a broad market planning range is around ₹60,000–₹80,000 per kW, while actual quotations can differ substantially based on equipment, installation complexity and vendor package.

The PM Surya Ghar Muft Bijli Yojana can make rooftop solar significantly more affordable for eligible residential consumers, with central assistance of up to ₹78,000 under the current structure.

If you are comparing a 3kW solar system price, 5kW solar system price, or 10kW solar system price, focus on the complete installed system rather than the panel price alone. Compare equipment, warranties, installation, metering support and after-sales service before making a decision.

For homeowners planning solar panel installation in Bihar, ZRN Solar can assist with understanding rooftop requirements, system sizing and installation planning. Always verify the latest PM Surya Ghar eligibility, subsidy and DISCOM requirements through official sources before making a financial commitment.

Frequently Asked Questions

If you are planning solar panel installation in Bihar, the PM Surya Ghar Muft Bijli Yojana can significantly reduce the upfront cost of a residential rooftop solar system. The scheme provides Central Financial Assistance (CFA) to eligible residential electricity consumers who install qualifying grid-connected rooftop solar systems.

For most eligible residential consumers, the current central subsidy structure provides ₹30,000 per kW for the first 2 kW, ₹18,000 for the additional 1 kW, with the total subsidy capped at ₹78,000 for systems above 3 kW. The official PM Surya Ghar portal currently displays the same structure.

For homeowners in Bihar, understanding the subsidy amount is only one part of the process. You also need to understand eligibility, system capacity, application procedures, vendor selection, DISCOM approval, net metering and post-installation verification.

This guide explains how much solar subsidy you can get in Bihar, how the subsidy is calculated and what you should know before investing in a residential rooftop solar system.

What Is PM Surya Ghar Muft Bijli Yojana?

PM Surya Ghar Muft Bijli Yojana is a Government of India initiative designed to encourage residential consumers to install grid-connected rooftop solar systems.

The programme provides Central Financial Assistance to eligible residential consumers. According to the Ministry of New and Renewable Energy (MNRE), CFA is intended for the residential sector, while non-residential consumers such as commercial and industrial consumers do not receive this residential CFA under the scheme.

For a homeowner in Bihar, the scheme can make a solar system for home more affordable while helping reduce dependence on conventional grid electricity.

How Much Solar Subsidy Is Available in Bihar?

For eligible residential rooftop solar installations, the current central subsidy structure is:

Rooftop Solar Capacity	Central Subsidy
1 kW	₹30,000
2 kW	₹60,000
3 kW	₹78,000
Above 3 kW	Maximum ₹78,000

The calculation is straightforward:

• First 1 kW: ₹30,000
• Second 1 kW: ₹30,000
• Third 1 kW: ₹18,000
• Maximum CFA: ₹78,000

The official PM Surya Ghar portal states that the subsidy is ₹30,000 per kW up to 2 kW and ₹18,000 for the additional capacity, with the subsidy for systems larger than 3 kW capped at ₹78,000.

Therefore, installing a 5 kW system does not mean that you receive ₹1.5 lakh or another amount calculated at ₹30,000 per kW. Once the eligible subsidy reaches ₹78,000, the central CFA remains capped at that amount under the stated structure.

What Is the Subsidy for a 1kW Solar System in Bihar?

For an eligible 1 kW residential rooftop solar system, the central subsidy is ₹30,000.

A 1 kW system may be suitable for a household with relatively modest electricity consumption, but the right capacity should be determined from your electricity usage, available roof area and technical assessment.

Homeowners should not select a 1 kW system solely because it attracts a particular subsidy. The objective should be to install a system that appropriately matches household electricity requirements.

What Is the Subsidy for a 2kW Solar System?

For an eligible 2 kW residential rooftop solar installation, the central subsidy can be ₹60,000.

This is calculated as:

₹30,000 × 2 kW = ₹60,000

A 2 kW system can be considered by households with moderate electricity consumption, although the appropriate capacity depends on actual consumption and site conditions.

Before deciding, request a professional assessment of your monthly electricity consumption and expected solar generation.

What Is the Subsidy for a 3kW Solar System?

For an eligible 3 kW residential rooftop solar system, the maximum central subsidy is ₹78,000.

The calculation is:

First 2 kW = ₹60,000

Additional 1 kW = ₹18,000

Total = ₹78,000

This makes a 3 kW system particularly relevant for homeowners searching for a 3kW solar system price and comparing the total project cost after applicable subsidy.

However, the subsidy does not mean the complete 3 kW system is free. The consumer generally remains responsible for the balance project cost and any applicable charges that are not covered by the CFA.

Is There Additional Subsidy for a 5kW or 10kW System?

The central residential subsidy is capped at ₹78,000.

For example:

• 3 kW system → up to ₹78,000 central subsidy
• 5 kW system → up to ₹78,000 central subsidy
• 10 kW system → up to ₹78,000 central subsidy

This is important when researching 5kW solar system price or 10kW solar system price in Bihar.

A larger system may generate more electricity, but the central subsidy does not continue increasing at ₹30,000 per kW beyond the applicable limits.

The official guidelines also explain that CFA eligibility is linked to eligible residential rooftop solar installations and the applicable capacity and scheme conditions.

Who Is Eligible for PM Surya Ghar Subsidy in Bihar?

The subsidy is intended for eligible residential electricity consumers installing qualifying grid-connected rooftop solar systems.

Before applying, homeowners should check the current requirements on the official portal. Important factors generally include:

• Having an eligible residential electricity connection
• Applying through the prescribed PM Surya Ghar process
• Installing an eligible rooftop solar system
• Using the required vendor mechanism
• Completing DISCOM verification
• Completing applicable metering and commissioning requirements
• Providing correct consumer and bank information

The scheme’s operational guidelines specify that CFA is for the residential sector and is linked to successful installation and verification.

Is PM Surya Ghar Subsidy Available for Commercial Solar Systems?

The residential CFA under PM Surya Ghar should not be confused with incentives or financing available for commercial and industrial solar projects.

The official MNRE rooftop solar programme specifically states that the residential CFA does not apply to non-residential segments such as government, commercial and industrial consumers under this component.

Therefore, a business owner looking for commercial solar solutions should investigate the applicable commercial rooftop solar regulations, financing options and state/DISCOM policies rather than assuming that the residential PM Surya Ghar subsidy applies.

How Does the PM Surya Ghar Subsidy Process Work in Bihar?

The subsidy process involves several stages rather than simply buying solar panels and receiving money immediately.

1. Register on the PM Surya Ghar Portal

The homeowner begins the application through the national PM Surya Ghar platform.

The official consumer portal provides the process for applying for rooftop solar and submitting bank details for subsidy processing.

2. Enter Electricity Consumer Details

You need to provide the required electricity connection and consumer information.

Make sure the information matches your electricity records.

3. Select an Eligible Vendor

The programme uses an approved vendor mechanism. The official vendor portal provides registration and vendor-related facilities under PM Surya Ghar.

4. Complete the Solar Site Assessment

Before installation, the roof should be assessed for:

• Available area
• Shading
• Roof orientation
• Structural conditions
• Electrical connection
• Suitable system capacity

A professional solar EPC company in Bihar can help with technical planning and installation requirements.

5. Install the Rooftop Solar System

The selected vendor installs the eligible grid-connected solar system according to the applicable technical requirements.

6. Complete DISCOM Verification and Metering

After installation, the relevant electricity distribution company is involved in verification, metering and commissioning.

MNRE states that applicable CFA is transferred after successful installation by eligible/empanelled vendors and verification by the State DISCOMs.

7. Submit or Confirm Bank Details

Correct bank information is important because the subsidy is processed according to the programme’s prescribed mechanism.

8. Track Subsidy Status

After completing the required steps, applicants should monitor the application and subsidy status through the official portal.

How Much Does a Solar System Cost After Subsidy?

The final amount you pay depends on the system size, equipment specifications, installation requirements and quotation provided by the vendor.

For example, if an eligible 3 kW system has a quoted project cost of ₹X, the applicable central subsidy can reduce the effective cost by up to ₹78,000, subject to all scheme conditions.

Therefore:

Effective project cost = Eligible project cost − applicable subsidy + any applicable non-subsidized charges

Do not compare solar companies solely by their advertised price. A lower quotation may exclude important components such as electrical protection, mounting structures, installation, metering-related work or after-sales support.

What Factors Affect Solar Panel Cost in Bihar?

The solar panel cost in Bihar can vary depending on:

• Solar panel technology
• Inverter brand and specifications
• System capacity
• Mounting structure
• Roof type
• Installation complexity
• Electrical protection equipment
• Cable length
• Metering requirements
• Warranty and after-sales service
• Additional civil or electrical work

This is why homeowners should obtain a detailed quotation rather than relying on a generic online price.

Does Net Metering Matter for the Subsidy?

Yes. For a grid-connected rooftop solar project, metering is an important part of the overall process.

The solar system generates electricity for the household, while excess generation can be exported to the grid according to the applicable regulatory and DISCOM framework.

The exact process, meter type and settlement mechanism should be confirmed with the relevant Bihar DISCOM before installation.

Can a Solar Company Help With the Subsidy Process?

A professional solar installer can help you understand the application workflow, system sizing, documentation, site survey, installation and coordination requirements.

However, homeowners should distinguish between installation assistance and government approval.

A solar company cannot independently guarantee government subsidy approval. Eligibility, verification and subsidy processing remain subject to the official PM Surya Ghar programme and applicable DISCOM procedures.

ZRN Solar can help homeowners evaluate their rooftop requirements, understand system options and plan solar installation, while applicants should verify subsidy rules and application status through official government channels.

Common Mistakes to Avoid When Applying for Solar Subsidy

Before applying for PM Surya Ghar in Bihar, avoid these common mistakes:

Choosing a System Only for the Subsidy

A 3 kW system may qualify for the maximum central subsidy, but a household may need a different capacity based on electricity consumption.

Comparing Only the Initial Price

Look at the complete quotation, equipment specifications, installation and warranty.

Assuming Subsidy Is Instant

Subsidy processing involves prescribed installation, verification and documentation steps.

Hiring an Unverified Installer

Use the appropriate vendor mechanism and check credentials before making payments.

Ignoring Roof Shading

Even an expensive solar system may underperform if significant shading is present.

Not Checking Warranty Terms

Ask for written product and workmanship warranty details.

Why Should Bihar Homeowners Consider Rooftop Solar?

A residential rooftop solar system can provide several long-term benefits:

• Lower grid electricity consumption
• Better use of unused roof space
• Renewable electricity generation
• Potential long-term electricity savings
• Greater energy independence
• Reduced exposure to future electricity tariff increases
• Access to applicable government financial assistance

The subsidy can reduce the initial investment, while the solar system itself can continue generating electricity for many years when properly installed and maintained.

Conclusion

For homeowners in Bihar, PM Surya Ghar Muft Bijli Yojana can provide up to ₹78,000 in central subsidy for an eligible residential rooftop solar installation under the current subsidy structure. The first 2 kW receive ₹30,000 per kW, while the third kW receives ₹18,000. Systems above 3 kW remain subject to the ₹78,000 maximum central subsidy.

However, the subsidy should be viewed as one part of the solar investment. The right system capacity, quality equipment, professional installation, DISCOM coordination, metering and long-term maintenance are equally important.

If you are comparing the solar system price for home, solar panel installation Bihar options or looking for a reliable solar company in Bihar, start by calculating your electricity requirements and requesting a detailed site assessment. ZRN Solar can help homeowners understand their rooftop solar requirements and installation options, while official subsidy eligibility should always be confirmed through the PM Surya Ghar portal and relevant authorities.

Official Sources

• PM Surya Ghar National Portal: https://pmsuryaghar.gov.in/
• MNRE – Grid Connected Rooftop Solar Programme: https://mnre.gov.in/en/grid-connected-solar-rooftop-programme/
• PM Surya Ghar Consumer Portal: https://consumer.pmsuryaghar.gov.in/consumer/

Frequently Asked Questions