Lhotse (BD) ONGRID Solar Project

153.13 kWp On-Grid Rooftop Solar PV System
Lhotse (BD) Ltd.

Location: Karnaphuli Export Processing Zone (KEPZ), Patenga, Chattogram, Bangladesh

Project Overview

Lhotse (BD) Ltd., a leading export-oriented manufacturing company located in Karnaphuli EPZ, sought to reduce its dependency on conventional grid electricity while improving operational sustainability. Alektra Renewable was entrusted with delivering a reliable rooftop solar photovoltaic system that would maximize rooftop utilization, comply with international engineering standards, and provide long-term economic benefits.

The project was successfully completed as a turnkey Engineering, Procurement, Construction (EPC) solution, including system design, engineering, installation, testing, commissioning, and grid synchronization.

System Specifications
Parameter Details
System Type On-Grid Rooftop Solar PV
Installed Capacity 153.13 kWp
PV Module Jinko Solar JKM625N-66HL4M-BDV
Module Rating 625 Wp (N-Type Monocrystalline)
Total Modules 245 Nos
Inverter Solis 150kW (S6GC150k-NV-ND)
Inverter Capacity 150 kW
Mounting Structure Hot-Dip Galvanized Steel Rooftop Structure
Grid Connection Three-Phase, 400 V
Monitoring Sungrow iSolarCloud Remote Monitoring
Engineering Challenges

The project presented several engineering challenges that required careful planning and optimization:

The rooftop consisted of both south-facing and north-facing roof sections, requiring optimized string configuration to minimize mismatch losses.
Long DC cable routes from rooftop arrays to the inverter location demanded careful voltage drop calculations and cable sizing.
The project location within a coastal industrial zone required corrosion-resistant mounting structures and equipment suitable for high-humidity environments.
The system was engineered to ensure compliance with Bangladesh grid requirements while maintaining optimal inverter loading and MPPT utilization.
Engineering Solution

Alektra Renewable developed a customized design that included:

Optimized string configuration based on roof orientation.
Independent MPPT allocation to prevent performance losses caused by different irradiance conditions.
High-efficiency Solis 150kW (S6GC150k-NV-ND) inverter with advanced multi-MPPT technology.
Hot-dip galvanized mounting structures designed considering coastal wind loading and corrosion resistance.
Comprehensive protection including AC/DC surge protection, earthing, and lightning protection systems.
Remote monitoring system enabling real-time performance tracking and fault diagnostics.
Expected Performance

The system is designed to deliver:

Significant reduction in daytime grid electricity consumption.
Reliable clean energy generation throughout the year.
Lower operational electricity costs.
Reduction in greenhouse gas emissions.
Long-term energy security with minimal maintenance requirements.

Estimated annual energy production is expected to exceed 190 MWh, depending on operating conditions, weather, and maintenance practices.

Environmental Impact

The installation contributes significantly toward the company's sustainability goals by reducing dependence on fossil-fuel-based electricity generation.

Estimated Annual Environmental Benefits

Annual Energy Generation: ≈190,000–205,000 kWh
CO₂ Emission Reduction: ≈125–135 metric tons/year
Equivalent Trees Planted: ≈5,800–6,300 trees annually
Project Highlights
✔ 153.13 kWp Industrial Rooftop Solar PV System
✔ 245 High-Efficiency Jinko N-Type Modules
✔ Solis 150kW (S6GC150k-NV-ND)Multi-MPPT String Inverter
✔ Advanced Remote Monitoring
✔ Corrosion-Resistant Installation for Coastal Environment
✔ Engineered to International Standards (IEC, BNBC, NEC)
Client Benefits

The completed system enables Lhotse (BD) Ltd. to:

Reduce electricity expenditure through self-generation.
Improve energy efficiency and operational sustainability.
Lower carbon emissions and support corporate ESG initiatives.
Enhance long-term energy resilience with a reliable, low-maintenance solar solution.
About Alektra Renewable

Alektra Renewable is a leading Engineering, Procurement, and Construction (EPC) company specializing in commercial and industrial solar photovoltaic systems across Bangladesh. Our expertise spans system design, engineering, installation, commissioning, energy storage integration, and long-term operation & maintenance, delivering reliable renewable energy solutions that maximize return on investment while supporting a sustainable future.