Policies & Consumer Protection7 min read

10 Vital Questions to Ask a Solar Installer in Kerala Before Signing a Contract

Customer protection guide for Kerala homeowners and businesses. Essential checklist to evaluate solar installers, equipment datasheets, structural certifications, warranties, and post-sales service.

By GSR Technical Engineering Desk·Published: March 02, 2026·Last verified: September 2026

Official Reference: Central Consumer Protection Authority (CCPA) / MNRE Solar Consumer Advisory(Advisory on Rooftop Solar Vendor Verification)

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Disclaimer: GSR Energies is an independent solar EPC contractor empaneled for PM Surya Ghar & KSEB net-metering installations. Government policies and subsidy guidelines are referenced directly from MNRE/KSEB official notifications. Regulations, tariffs, fees and application procedures may change; confirm the latest official KSEB/KSERC/MNRE information before making a final investment decision.

Key Takeaways at a Glance

Verify that the installer is officially empanelled with KSEB and registered on the PM Surya Ghar National Portal.
Insist on written component specifications (brand, wattage, DCR status, inverter model, structure material).
Differentiate clearly between 10-year product warranty and 25-to-30-year performance warranty.
Ensure the contractor provides a certified structural engineer wind stability certificate for 150 km/h gusts.
Check whether the company has physical registered offices and service desks in Kerala or relies on transient subcontractors.

Table of Contents

Why Due Diligence is Critical When Choosing a Solar Partner

Rooftop solar is a 25-to-30-year capital investment on your residential or commercial property. With the massive popularity of the PM Surya Ghar subsidy in Kerala, hundreds of new marketing agencies and electrical contractors have entered the market.

While panels may appear identical from the street, significant differences exist in cell technology, structural galvanization depth, electrical safety equipment, and long-term service support.

The 10 Essential Questions Every Customer Must Ask

Present this checklist to any solar company before placing an advance deposit:

—1. Are you an officially empanelled vendor on KSEB's eKiran portal and the National PM Surya Ghar Portal?
—2. Are the proposed modules 100% Domestic Content Requirement (DCR) compliant with ALMM List-I certification?
—3. What is the physical product warranty on the panels versus the linear power performance warranty?
—4. What brand and model of inverter will be installed, and where is the manufacturer's nearest Kerala service center?
—5. What material is used for the mounting structure? Is it hot-dip galvanized (HDG 80+ microns) or aluminum, and is it wind-rated to 150 km/h?
—6. Do you install dedicated copper-bonded chemical earthing pits (separate for AC, DC, and lightning arrester)?
—7. Who handles the complete liaison with KSEB for feasibility, test reports, and bi-directional meter testing?
—8. Does the system include real-time mobile app and cloud monitoring to track daily kWh generation?
—9. Do you have in-house engineering and installation teams, or do you outsource the physical work to third-party daily-wage laborers?
—10. Can you show me completed, operational solar installations in my district that I can verify?

How to Accurately Compare Two Solar Quotations

When comparing quotations from different installers, ensure you evaluate the Bill of Quantities (BOQ) line by line rather than solely comparing the bottom-line price.

Comparison Factor	High-Standard Installation (GSR Energies)	Sub-Standard / Lowball Quote
Solar Panels	Tier-1 N-Type TOPCon 550W+ DCR Modules	Older Mono PERC or Non-DCR Modules
Mounting Structure	Hot-Dip Galvanized (HDG) / Marine Aluminum	Painted Mild Steel (MS) pipes prone to rust
Inverter Specification	Multi-MPPT with IP65 rating & WiFi cloud app	Basic single-MPPT with limited monitoring
Earthing System	3 dedicated copper-bonded chemical earth pits	Single GI pipe or tapped into house earth
Surge Protection	Class-II SPD in separate AC & DC distribution boxes	Omitted or low-grade glass fuses
Workmanship Warranty	5-year comprehensive installer workmanship warranty	None (blames hardware manufacturer)

Warning Signs & Red Flags to Avoid

Be cautious if an installer makes unrealistic promises such as "your KSEB bill will be zero rupees forever" or "the government will pay 100% of the cost." KSEB bills always retain nominal fixed charges, and government subsidies have strict caps (₹78,000 for residential systems).

Avoid installers who demand 100% upfront cash payment before feasibility approval, or who cannot provide a registered business address and GST certificate in Kerala.

Kerala Rooftop Solar & KSEB Implementation Impact

How these regulations, technical specifications, and standards apply specifically to homes and commercial setups connected to the Kerala State Electricity Board (KSEBL) grid:

Protects consumers in Malappuram, Kozhikode, and across Kerala against unverified middle-men and fly-by-night operators.
Ensures transparency in quotation comparison so homeowners compare identical technical specifications.
Secures smooth KSEB net metering execution and timely direct bank transfer subsidy disbursement.

Frequently Asked Questions

How can I verify if an installer is officially empanelled with KSEB?

You can verify approved vendors directly on the official PM Surya Ghar national portal (pmsuryaghar.gov.in) under the "Registered Vendors" section by selecting Kerala state and KSEB distribution company.

What is a workmanship warranty and why is it important?

While manufacturers warrant modules and inverters against component defects, the installer's workmanship warranty covers roof waterproofing, structural stability, cable clipping, and electrical connection integrity.

Internal Solar Resources for Kerala