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Solar guides, tips & news for Tamil Nadu

Expert insights on solar installation, subsidies, and savings — from a team with 460+ installations across Tamil Nadu.

PM Kusum Subsidy 2025: How to Get ₹78,000 for Your Home Solar System
FeaturedSubsidy & Policy

PM Kusum Subsidy 2025: How to Get ₹78,000 for Your Home Solar System

A step-by-step guide to claiming the PM Kusum Yojana subsidy for residential rooftop solar in Tamil Nadu. Learn the eligibility criteria, documents required, and how Heliostrom handles the entire process for you.

March 15, 20267 min read
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On-Grid vs Hybrid Solar: Which is Right for Your Chennai Home?Residential
March 8, 20266 min read

On-Grid vs Hybrid Solar: Which is Right for Your Chennai Home?

Should you go on-grid and export excess power, or invest in a hybrid system with battery backup? We break down the costs, savings, and the right choice for Tamil Nadu's grid reliability.

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Solar ROI in Tamil Nadu: When Will Your System Pay for Itself?Savings & ROI
February 28, 20268 min read

Solar ROI in Tamil Nadu: When Will Your System Pay for Itself?

Real numbers from 460+ Heliostrom installations. We analyse average payback periods for 3 kW, 5 kW, and 10 kW systems across Chennai, Coimbatore, and Salem.

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TANGEDCO Net Metering: How It Works and How to ApplySubsidy & Policy
February 20, 20265 min read

TANGEDCO Net Metering: How It Works and How to Apply

Net metering lets you sell surplus solar power back to the grid and reduce your EB bill to near-zero. Here's the complete TANGEDCO application process explained.

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50 kW Industrial Solar: How Ambattur Factory Cut EB Bills by 70%Commercial
February 12, 20266 min read

50 kW Industrial Solar: How Ambattur Factory Cut EB Bills by 70%

A real case study from our Ambattur installation. How a 50 kW rooftop system reduced a garment factory's monthly EB bill from ₹60,000 to ₹18,000.

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Solar Panel Maintenance in Chennai: How to Keep Efficiency at 100%Installation
February 5, 20264 min read

Solar Panel Maintenance in Chennai: How to Keep Efficiency at 100%

Dust, bird droppings, and Chennai's coastal humidity all reduce solar output. Here's a practical maintenance schedule to keep your panels producing at peak efficiency.

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Best Solar Panels for India in 2025: Tier-1 vs Budget PanelsResidential
January 28, 20269 min read

Best Solar Panels for India in 2025: Tier-1 vs Budget Panels

Not all solar panels are equal. We compare Tier-1 panels (Waaree, Adani, Vikram) with budget options on efficiency, warranty, and long-term savings for Indian conditions.

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What Happens During a Solar Installation? A Day-by-Day BreakdownInstallation
January 20, 20265 min read

What Happens During a Solar Installation? A Day-by-Day Breakdown

Curious about what goes on during your solar installation? From site assessment to first power generation, we walk you through every step of a typical 2-day residential install.

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Commercial Solar Tax Benefits in India: 40% Accelerated Depreciation ExplainedCommercial
January 14, 20267 min read

Commercial Solar Tax Benefits in India: 40% Accelerated Depreciation Explained

Businesses installing solar can claim 40% accelerated depreciation in the first year, dramatically reducing their effective system cost. Here's how it works.

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Solar Battery Backup in 2025: Is It Worth the Extra Cost?Residential
January 7, 20266 min read

Solar Battery Backup in 2025: Is It Worth the Extra Cost?

With grid outages still common in Tamil Nadu, many homeowners ask about battery backup. We break down the real costs, benefits, and when a hybrid system makes financial sense.

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TNREDCO Solar Loan: Finance Your Solar System at 6.5% InterestSubsidy & Policy
December 28, 20255 min read

TNREDCO Solar Loan: Finance Your Solar System at 6.5% Interest

TNREDCO offers subsidised loans for rooftop solar in Tamil Nadu. We explain the eligibility, loan amounts, repayment terms, and how to apply through Heliostrom.

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Can Apartments Go Solar in Chennai? A Complete Guide for Housing SocietiesResidential
December 20, 20257 min read

Can Apartments Go Solar in Chennai? A Complete Guide for Housing Societies

Multi-family apartments can install common area solar and distribute savings across all residents. Here's how group net metering works and what TANGEDCO requires.

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