A complete guide for homeowners and businesses planning to switch to solar in 2025

Choosing the right solar panel company in Delhi is one of the most important decisions you will make for your home or business. A solar system lasts 25+ years, so the quality of installation, service, and company reliability matters far more than just the panel brand or price.

Delhi has dozens of solar vendors — but not all offer the same expertise, quality, or support. To help you make a safe and informed decision, here are the top 10 things you must check before choosing a solar panel company.

1. Company’s Certifications & Government Registration

Always check whether the company is:

• MNRE-approved

• Registered on the Delhi DISCOM portal (TPDDL, BRPL, BYPL)

• A certified solar EPC vendor

These certifications ensure the company follows government standards and is eligible to process your subsidy.

2. Experience & Track Record in Solar Projects

Experience matters.
Look for:

• Number of years in the solar industry

• Total installations completed

• Case studies, photos, and customer success stories

A company with proven experience will guarantee better installation quality and system performance.

3. Quality of Solar Panels & Inverters Used

Technology decides long-term performance.
Ensure the company uses:

• Tier-1 solar panels

• High-efficiency inverters (String/Hybrid/On-grid)

• Quality mounting structures

• Certified wiring & safety components

Cheap components lead to low generation and frequent breakdowns.

4. Warranty on Panels, Inverters & Workmanship

A good solar company should offer:

• 25-year performance warranty on panels

• 8–12 year warranty on inverters

• 5-year workmanship warranty

If the warranties are unclear or not documented, that's a red flag.

5. Transparent Site Survey & Load Analysis

Before installation, the company must conduct:

• In-person site survey

• Shade analysis

• Structural assessment

• Load requirement analysis

This ensures your solar system is designed correctly and generates maximum electricity.

6. Clarity in Pricing — No Hidden Charges

A reliable company provides a clear quotation with:

• Equipment details

• Installation charges

• Net-meter charges

• Civil work (if needed)

• Warranty details

• AMC or O&M charges

If a company avoids sharing written pricing, avoid them.

7. Complete Support for Subsidy & Government Approvals

Solar subsidy involves multiple approvals:

• Stage-1

• Stage-2 (Technical)

• Stage-3 (Commissioning)

• Net-meter approval

• DISCOM inspection

The company should assist you at every step, including portal submissions and documentation.
In Delhi, subsidy approval takes 45–90 days after commissioning.

8. After-Sales Service & Maintenance Capability

Solar is a long-term product.
Ask the company about:

• Service response time

• Maintenance packages (AMC/O&M)

• Warranty claim support

• Real-time monitoring support (if available)

A company that disappears after installation is dangerous — choose a vendor with strong after-sales commitment.

9. Installation Quality & Safety Standards

Poor installation leads to:

• Low generation

• Loose wiring

• Water leakages

• System breakdowns

Check whether the company follows:

• Proper earthing

• Surge protection

• Correct tilt angle

• Waterproof wiring

• High-quality structures

• Clean installation practices

Ask for photos of their past work.

10. Customer Reviews & Ratings

Before finalizing, read:

• Google reviews

• Social media ratings

• Testimonials

• Video feedback

Look for patterns — consistent positive feedback means good service, while repeated complaints indicate real issues.

Final Tip: Don’t Choose Cheap, Choose Trusted

Solar is a 25-year investment, not a one-time purchase.
A cheap solar vendor may save you money now, but cost you lakhs in the long run through:

• Poor generation

• Faulty components

• Weak installation

• No after-sales service

• Repeated breakdowns

• Warranty issues

Choose a company that provides:

✔️ Quality
✔️ Transparency
✔️ Experience
✔️ Proper documentation
✔️ Long-term support

Finding the right solar partner ensures your rooftop becomes a reliable, efficient, and profitable power source for the next three decades.