Solar Vendors in Bihar: How to Find and Verify the Right Installer

Finding reliable solar vendors in Bihar is the decision that decides whether your rooftop plant earns its subsidy or becomes an expensive roof decoration. Panels and inverters are commodities with published prices; the installer decides whether the DCR paperwork is right, whether NBPDCL or SBPDCL approves the net-metering application, and whether the plant keeps running through the monsoon. This state-wide guide covers how vendor registration works across both of Bihar's DISCOMs, how to verify a firm on the national portal, and the red flags that mean you should walk away. For Patna-specific installer checks, see our Patna vendor guide.

How to Find Verified Solar Vendors in Bihar

A verified vendor in Bihar is a firm registered on the national portal pmsuryaghar.gov.in and able to work with your DISCOM, which is NBPDCL (North Bihar Power Distribution Company Limited) for north Bihar districts or SBPDCL (South Bihar Power Distribution Company Limited) for south Bihar including Patna. Only portal-registered firms can process the PM Surya Ghar subsidy for your installation, and your DISCOM must accept their net-metering filings. Start on the portal, not on Google ads.

Open pmsuryaghar.gov.in, register with your consumer number, and filter the vendor list to Bihar and then to your district. Write down three or four names and check each firm's registration status and contact details on the portal. Note the exact company name, because you will match it against the empanelment letter and the GST invoice later. A firm that genuinely serves your district will have recent installations nearby and will name them without hesitation.

Documents to Verify Before You Sign in Bihar

Paperwork is your only protection, and genuine firms produce it without being asked twice. Verify these five before paying anything beyond a small booking amount.

• Portal registration. The firm's name on pmsuryaghar.gov.in must match the name on every other document. Screenshot the listing.
• DCR declaration. DCR (Domestic Content Requirement) means panels built with Indian-made solar cells, and the central subsidy is paid only for DCR modules. Get the manufacturer's declaration and match serial numbers at delivery.
• DISCOM working relationship. Ask for evidence of recent commissioned plants under NBPDCL or SBPDCL, such as commissioning certificates with names redacted, and offer to call the division office to confirm.
• GST invoice in your name. Must carry the vendor's GSTIN and your name and address. You need it for the subsidy claim and any warranty dispute.
• Written warranties. Typical terms are 25 years of panel performance warranty, 5 years product warranty on panels and inverter, and 5 years workmanship warranty on installation. Get all three on letterhead, not on WhatsApp.

Red Flags: When to Walk Away

Walk away from any installer who demands full payment upfront, promises subsidy on non-DCR panels, refuses to handle net-metering paperwork, or offers no written warranty. Normal practice is a small booking amount, the bulk after installation, and the final part after the net meter is commissioned. Pressure lines like "the subsidy closes this month" are false: PM Surya Ghar is an ongoing national programme, and genuine deadlines are published on the portal, not invented in your living room.

• Quote far below market. A 3 kW system costs about ₹1.7 to ₹2.0 lakh before subsidy in Bihar in 2026. A quote near ₹1.2 lakh means corners cut on panels, structure, or wiring.
• No site survey. A genuine vendor inspects your roof, checks shading through the day, and assesses the structure before quoting. A quote given over the phone is a guess.
• Cash-only deal. Insist on bank transfer or cheque against a GST invoice. Cash payments leave no trail for subsidy or warranty claims.
• Subcontracting without disclosure. Ask who will actually climb onto your roof. If the firm subcontracts, get the subcontractor's name and credentials too.

Bihar's DISCOM Landscape and What It Means for You

Bihar's two DISCOMs run the same national scheme with local differences in office practice. SBPDCL's Patna divisions process the highest volumes and are generally the fastest; smaller NBPDCL divisions can be slower but are catching up, with MNRE reviews noting thousands of recent installations on both sides. Since the July 2026 BERC fee waiver, neither DISCOM charges domestic PM Surya Ghar consumers an application fee or meter testing charge, which removes a common friction point statewide.

Whichever DISCOM serves you, the vendor's job includes the feasibility application, the work completion report, and coordination of the inspection and meter installation. Confirm all three are in the written agreement. If a vendor asks you to "handle the DISCOM side yourself," they are telling you they cannot work with your utility, and you should pick another name from the portal list.

Frequently Asked Questions