Residential SolarBhagalpur, BiharCompleted: April 2026

5 kW On-Grid Rooftop Solar Installation in Tilkamanjhi, Bhagalpur

A joint family residence in Tilkamanjhi, Bhagalpur needed a resilient solar system to cover high electricity usage including 3 AC units, submersible pump, and everyday home appliances.

5 kW On-Grid Rooftop Solar Installation in Tilkamanjhi, Bhagalpur
System Capacity5 kW
Annual Generationapprox. 7,200 Units (kWh)
Annual Savingsapprox. ₹58,000 / year
Subsidy / Benefit₹78,000 (Maximum Cap under PM Surya Ghar)

Electricity Bill Comparison: Before vs After

Monthly Bill Before Solar
₹6,500 - ₹7,200

Prior to rooftop solar, high summer electricity usage drove billing into the highest tariff slabs.

Monthly Bill After Solar Commissioning
₹600 - ₹800

Solar generation meets virtually the entire daytime load, leaving only basic fixed meter connection charges.

The Challenge

High electricity tariff slab rates resulting in ₹80,000+ yearly power bills, alongside frequent voltage fluctuations in the local grid area.

The Engineering Solution

Designed and installed a 5 kW on-grid solar system with high surge protection devices (SPDs), Class-1 lightning arrestors, and independent chemical earthing pits for AC and DC sides.

Verified Project Outcomes

Annual savings of approximately ₹58,000 on household energy costs
Estimated simple payback period of under 3.2 years (post-subsidy)
Stable performance with automated grid disconnect safety compliance

Installed Technical Hardware

Solar Module:Tier-1 Mono PERC 545W Panels (144 Cell Monocrystalline)
Inverter:5 kW Three-Phase Grid-Tied Inverter (Dual MPPT with SPD Class-II Protection)
DISCOM:NBPDCL (North Bihar Power Distribution Company Ltd)
Net Metering Status:Connected & Commissioned (NBPDCL Bi-directional Meter)

The Bhagalpur team at Shree Laxmi Traders is very responsive and knowledgeable. They guided us step-by-step through the government portal and installed very neat wiring.

Sunita Devi & Dr. R. K. Singh (Residents, Tilkamanjhi, Bhagalpur)

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