Solar Installation Checklist: How to Choose the Best Solar Company in Delhi, India
What most solar companies never tell you — and why planning & protection decide your system’s life.
Installing rooftop solar is a smart decision — only if it’s done right.
Most solar issues don’t appear immediately. They surface after months or years, when shortcuts
in structure, safety, or design start showing. Before finalising your solar vendor,
ensure these 13 critical technical points are followed.
1. Roof Fixing Must Go Deep Into the Slab
Solar structures must be anchored deep into the concrete slab with heavy foundations —
not just surface screws. Proper slab puncture ensures stability against wind, rain,
and long-term vibrations.
Exolar Advantage: Deep slab anchoring with heavy-duty foundation.
2. Chemical Fasteners Are Mandatory
Chemical fasteners provide superior grip compared to normal bolts.
They lock the structure permanently into the concrete and prevent loosening over time.
Exolar Advantage: Approved chemical anchoring systems for long life.
3. Only Hot-Dip Galvanized (HDG) Structures Last
HDG structures have thick zinc coating that prevents rust for 20–25+ years.
Pre-galvanized structures corrode early and weaken the system.
Exolar Advantage: 100% HDG mounting structures.
4. Components Must Be Manufacturer-Certified
Panels, inverters, and accessories should come directly from certified manufacturers.
Local market or mixed components reduce performance and void warranties.
5. Installation Must Be Done by a Dedicated Solar Team
Solar installation is a specialised job. General electricians or side-business installers
often ignore safety and performance standards.
6. Pricing Must Be Clear & All-Inclusive
All costs — structure, wiring, earthing, net-metering — should be declared upfront.
Hidden charges later indicate poor professionalism.
7. Fast After-Sales Support Is Critical
Any solar issue should be resolved within 48 hours.
Delays mean power loss and revenue loss.
8. System Design Must Match Your Usage
Every home has different electricity needs.
Copy-paste system designs lead to poor ROI and underperformance.
9. Shadow Analysis Is Non-Negotiable
Even minor shadows from tanks or nearby buildings can significantly reduce generation.
10. Fire-Resistant Solar DC Cables Only
Normal wires degrade quickly and increase fire risk.
Solar-grade DC cables are mandatory for safety.
11. Proper Inverter Placement Matters
Inverters must be installed in shaded, ventilated locations to ensure long life.
12. Earthing & Lightning Protection Are Mandatory
Dedicated earthing, surge protection, and lightning arrestors ensure safety
during faults and storms.
13. Net Metering & Approvals Should Be Vendor’s Responsibility
Customers should not run behind DISCOM approvals.
A professional company handles everything end-to-end.
Choose a Solar Partner, Not Just a Vendor
A system installed with the right planning, protection, and professionalism
delivers performance for 25+ years.
Trusted by Delhi NCR homeowners — Exolar Energy
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