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:
- Is the quoted price before or after subsidy?
- Does the price include installation?
- Which solar panels will be supplied?
- Which inverter will be installed?
- Is the mounting structure included?
- Are earthing and protection devices included?
- Who handles the DISCOM and metering process?
- What warranties are provided?
- What happens if a component fails?
- 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
What is the solar panel cost in Bihar in 2026?
Residential rooftop solar prices vary by system type and equipment. A practical planning range for installed on-grid systems is approximately ₹60,000–₹80,000 per kW, but actual Bihar quotations can vary significantly.
What is the price of a 3kW solar system in Bihar?
A 3 kW installed on-grid system may commonly fall around ₹1.6–₹2.2 lakh before subsidy, depending on equipment and installation requirements.
How much is the 3kW solar subsidy in Bihar?
Eligible residential consumers can receive up to ₹78,000 in central CFA under the current PM Surya Ghar structure.
What is the 5kW solar system price in Bihar?
A 5 kW on-grid system may cost approximately ₹2.5–₹3.8 lakh before subsidy, although actual prices vary by brand, inverter, installation and quotation.
Is battery included in a normal rooftop solar system?
Not necessarily. Standard on-grid systems generally do not include batteries. If you require backup power, a hybrid system with battery storage will increase the total cost.
Can I get PM Surya Ghar subsidy for a commercial solar system?
The residential CFA under PM Surya Ghar is intended for eligible residential consumers. Commercial and industrial consumers should check the incentives and regulations applicable to their category.
Does a higher-capacity system receive more subsidy?
The central subsidy is capped at ₹78,000 under the current residential structure, so installing a 5 kW or 10 kW system does not increase the central CFA proportionally beyond that cap.
How can I find the right solar system size for my home?
Review your electricity bills and consumption pattern, then have a professional installer conduct a site survey. The recommended capacity should consider consumption, roof area, shading and applicable electrical requirements.