SOLAR SYSTEMS

Design, Supply, Installation & Maintenance of Complete Solar Energy Solutions

Mosam Engineering (Pvt.) Ltd. | Pakistan

Pakistan’s Solar Energy Potential Engineered Into Real Results

Pakistan is one of the most solar-resource-rich countries in the world. With an average of 5.5 to 7.5 peak sun hours per day across most of the country and more than 300 sunny days per year in regions including Punjab, Sindh, Balochistan, and Khyber Pakhtunkhwa, Pakistan has an abundance of solar energy that remains vastly underutilized. At the same time, the country faces some of its most persistent and costly energy challenges—chronic load shedding, rising electricity tariffs, grid instability, and fuel costs that directly impact household budgets, business profitability, and industrial competitiveness.

Solar energy is not simply an environmental choice in Pakistan—it is an economic imperative. A correctly designed and professionally installed solar system delivers measurable, bankable reductions in electricity costs from the first month of operation, with payback periods that have shortened dramatically as panel and battery costs have fallen and electricity tariffs have risen.

Mosam Engineering (Pvt.) Ltd. brings the same engineering rigor to solar systems that defines our work across HVAC and MEP disciplines. We do not sell panels—we engineer complete energy solutions. Every solar project begins with a thorough site assessment, a detailed energy consumption analysis, accurate solar resource modelling, and a system design that is precisely sized for your load profile, your roof or ground space, your grid connection status, and your financial objectives. From a rooftop residential installation to a large-scale commercial or industrial solar plant, we deliver solutions that perform as designed, last the duration of their warranty, and are supported by a structured maintenance program throughout their operational life.

Pakistan’s Solar Energy Potential—Engineered Into Real Results

About Us

Excellence in Every Degree delivering precise, reliable, and high-performance engineering solutions.

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Mosam Engineering is Pakistan’s premier HVAC and engineering solutions provider, delivering excellence for over 20 years. Since our establishment in 2007, we’ve built a trusted reputation for quality, innovation, and customer satisfaction across residential, commercial, and industrial sectors.

HVAC

HVAC Installation & Services

Project Design

Project Design & Planning

Engineering Solutions

Interior Engineering Solutions

Contracting

Contracting & Management Services

Our Solar Systems Services

Mosam Engineering provides a complete range of solar energy services across Pakistan—covering every stage from initial feasibility and system design through to professional installation, net metering, ongoing maintenance, and independent performance audits.

On-Grid Solar Systems

Grid-tied solar with net metering for immediate electricity bill reduction

Off-Grid Solar Systems

Independent solar power for remote locations without grid access

Hybrid Solar Systems

Solar generation, battery backup, and grid connection in one integrated system

Solar Panel Installation

Rooftop, flat roof, ground-mount, carport, and agrivoltaic structures

Solar Inverters

String, hybrid, off-grid, and microinverter supply and installation from leading brands

Solar Batteries

LiFePO₄, lithium NMC, VRLA AGM, and modular battery system supply and installation

Solar Maintenance

Panel cleaning, inverter servicing, battery health checks, and performance monitoring

Solar System Audit & Performance Assessment

technical review of existing installations

Net Metering Application & NEPRA Compliance

Full application management across all DISCOs in Pakistan

Solar for HVAC

Integrated solar and HVAC energy solutions for maximum financial return

On-Grid Solar Systems

Reduce your electricity bill immediately sell surplus energy back to the grid.

An on-grid solar system—also called a grid-tied system—connects directly to the national electricity grid through a grid-tied inverter. During daylight hours, solar panels generate electricity that is consumed directly by the building’s loads. Any surplus generation above immediate demand is exported to the grid, and any shortfall below demand is automatically imported from the grid. There are no batteries, no interruption, and no manual switching—the system operates entirely automatically.

On-grid systems are the most cost-effective solar solution for properties with a reliable grid connection and significant daytime electricity consumption. Under Pakistan’s net metering regulations, NEPRA-registered consumers can export surplus solar generation to DISCO distribution companies and receive a credit against their electricity bill—significantly improving the financial return on the solar investment.

On-Grid System Features and Benefits

  • Lowest capital cost per kilowatt of any solar configuration
  • Immediate electricity bill reduction from day one of operation
  • Net metering eligibility—export surplus generation for bill credits
  • No battery degradation costs—minimal ongoing maintenance requirement
  • Scalable design—capacity can be expanded as load or budget grows
  • Real-time generation monitoring via inverter app or web portal
  • Suitable for residential, commercial, industrial, and agricultural consumers

Our On-Grid Design and Installation Process

  • Site survey, roof assessment, and shading analysis
  • Energy consumption audit—analysis of 12 months of electricity bills
  • System sizing using PVsyst or equivalent solar modelling software
  • NEPRA net metering application support and DISCO liaison
  • Structural assessment of mounting surface for panel load bearing
  • Professional installation by certified solar engineers
  • Grid protection relay commissioning and utility interconnection testing
  • System handover with generation monitoring setup and owner training
on grid solar systems

Off-Grid Solar Systems

Complete energy independence—reliable power where the grid cannot reach.

Off-grid solar systems operate entirely independently of the national electricity grid. All energy generated by the solar panels is stored in a battery bank and consumed directly by the building’s loads—making these systems the solution of choice for properties in remote locations without grid access, agricultural installations, telecom towers, remote monitoring stations, and communities in rural Pakistan where grid extension is not economically viable or technically feasible.

Off-grid systems must be designed with considerably greater engineering precision than on-grid systems. There is no grid to fall back on—the system must be sized to meet the entire load through the worst solar irradiation periods of the year, with sufficient battery capacity to carry the loads through nights and consecutive overcast days without causing deep battery discharge that shortens battery life. Mosam Engineering designs every off-grid system with accurate load profiling, worst-case solar modeling, and appropriate autonomy days built into the battery capacity calculation.

Off-Grid System Applications

  • Remote residential properties and farmhouses without grid access
  • Agricultural installations—tube wells, irrigation pumps, and farm buildings
  • Rural commercial premises and community facilities
  • Telecom towers, repeater stations, and remote monitoring equipment
  • Construction site temporary power supply
  • Disaster relief and emergency power installations

Off-Grid System Design Considerations

  • Full load audit—every electrical load catalogued by wattage and daily usage hours
  • Battery autonomy calculation—typically 1 to 3 days of autonomy depending on application criticality
  • Panel sizing to recharge batteries fully within available daily solar window
  • Charge controller selection—MPPT type for maximum energy harvest efficiency
  • Inverter sizing for both continuous load and surge loads (motors, pumps, compressors)
  • Battery type selection—lithium iron phosphate (LiFePO₄) or sealed VRLA based on budget and cycle requirements
  • System earthing, lightning protection, and DC protection devices
  • Remote monitoring integration where site access is limited

Hybrid Solar Systems

The best of both worlds—solar generation, battery backup, and grid connection in one intelligent system.

Hybrid solar systems combine the grid connection of an on-grid system with the battery storage of an off-grid system, creating the most versatile and resilient solar energy configuration available. During daylight hours, solar panels power the building’s loads and charge the battery bank simultaneously. When the battery is fully charged, surplus generation is exported to the grid. During load shedding or grid outages, the system seamlessly transitions to battery power—maintaining supply to critical loads without interruption. At night, stored battery energy supplements or replaces grid import.

In Pakistan’s current energy landscape—where load shedding remains frequent and unpredictable across residential and commercial areas—hybrid solar systems have become the most popular choice for consumers who want both the financial benefits of net metering and the operational security of backup power. Mosam Engineering designs hybrid systems that are intelligently configured to prioritize self-consumption, minimize grid import, and provide reliable backup during outages.

Key Advantages of Hybrid Solar Systems

  • Uninterrupted power during load shedding—critical loads remain energised
  • Maximum self-consumption of solar generation—reducing grid dependency
  • Net metering eligibility for surplus export
  • Time-of-use optimization—charge batteries during off-peak tariff periods
  • Scalable battery capacity—additional battery modules added as budget allows
  • Single integrated system—one inverter manages solar, battery, and grid seamlessly
  • Remote monitoring and control via app or web dashboard

Hybrid System Design and Engineering

  • Critical load identification—determining which loads must remain energised during outages
  • Battery capacity sizing based on backup duration requirements and load profile
  • Hybrid inverter selection—single-phase or three-phase based on supply configuration
  • Solar array sizing to cover daytime consumption and battery recharge simultaneously
  • Grid protection and anti-islanding compliance for net metering approval
  • BMS integration for energy management scheduling and performance monitoring
  • Full commissioning and owner training on system operation and monitoring

Solar Panel Installation

Professional mounting, precise orientation, and structural integrity—the foundation of every solar system.

The physical installation of solar panels is far more than placing panels on a roof. Structural loading, roof waterproofing integrity, optimal tilt angle and azimuth orientation, inter-row shading avoidance, DC cable sizing and routing, earthing and lightning protection, and long-term wind load resistance all require engineering discipline and experienced installation teams. A poorly installed solar array—with inadequate fixings, incorrect orientation, compressed DC cables, or compromised roof waterproofing—will underperform, fail prematurely, or create a structural or fire safety hazard.

Mounting Systems We Install

  • Rooftop flush-mount systems—pitched metal, concrete, and RCC roofs
  • Ballasted flat roof mounting systems—no roof penetrations required
  • Elevated tilt-frame systems on flat roofs—optimized angle for maximum generation
  • Ground-mounted fixed-tilt structures—galvanized steel for agricultural and industrial sites
  • Carport solar structures—dual-purpose covered parking and power generation
  • Elevated ground mount with agricultural use beneath—agrivoltaic installations

Installation Quality Standards

  • Structural calculation for roof or ground mount load-bearing capacity
  • Tilt angle optimisation for latitude and seasonal irradiation profile
  • Inter-row spacing calculation to eliminate self-shading at winter sun angles
  • DC cable sizing per IEC 60364—minimizing resistive losses
  • IP-rated junction boxes and MC4 connectors throughout
  • Dedicated DC isolators at array and inverter ends
  • Anti-theft fasteners and tamper-resistant cable management
  • Roof penetration waterproofing guarantee on all penetrated roof installations

Solar Inverters

The intelligence of your solar system—converting sunlight into usable power with maximum efficiency.

The solar inverter is the most technologically complex and operationally critical component in any solar system. It converts the direct current (DC) output of the solar panels into the alternating current (AC) that powers your building’s loads, manages the Maximum Power Point Tracking (MPPT) algorithm that extracts the maximum available energy from the panels at all irradiation levels, controls battery charging and discharging in hybrid systems, manages the grid interconnection, and provides the data interface for system monitoring. Inverter selection is not a commodity decision—it directly determines system efficiency, reliability, and long-term energy yield.

Inverter Types We Supply and Install

  • String inverters—cost-effective for unshaded, uniform-orientation rooftop arrays
  • Hybrid inverters—integrated solar, battery, and grid management in a single unit
  • Off-grid inverter/chargers—standalone power conversion and battery management
  • Microinverters—panel-level conversion for shaded or complex multi-orientation roofs
  • DC optimisers with string inverters and MPPT with string-level conversion
  • Three-phase commercial inverters—for commercial and industrial installations
  • High-frequency and low-frequency inverters—selected based on load characteristics and battery type

Brands We Work With

Mosam Engineering works with inverters from internationally certified manufacturers with proven track records in Pakistani operating conditions. Our recommended brands include Huawei SUN2000, Sungrow, Fronius, SMA, Growatt, Sofar Solar, Deye, and Victron Energy, among others. We select inverters based on technical performance, warranty terms, local service availability, and compatibility with the battery and monitoring systems specified for each project—not on margin.

solar inverters
solar betteries

Solar Batteries

Storing the sun’s energy—independence from load shedding and rising tariffs.

Battery storage is the component that transforms a solar system from a daytime electricity generator into a round-the-clock energy solution. The correct battery selection—chemistry, capacity, depth of discharge rating, cycle life, operating temperature range, and compatibility with the chosen inverter—is one of the most technically consequential decisions in solar system design. An undersized or incorrectly specified battery bank is the most common cause of solar system dissatisfaction in Pakistan, where buyers have been oversold on capacity but undersold on quality and cycle life.

 

Mosam Engineering specifies batteries based on honest load analysis, realistic autonomy expectations, and the total cost of ownership over the battery’s warranted cycle life—not on the headline kilowatt-hour figure that looks attractive in a sales brochure.

Battery Technologies We Supply and Install

  • Lithium Iron Phosphate (LiFePO₄)—the gold standard for cycle life, safety, and operating temperature tolerance; 3,000 to 6,000+ cycles at 80% depth of discharge
  • Lithium NMC (Nickel Manganese Cobalt)—higher energy density for space-constrained installations
  • Sealed VRLA AGM batteries—cost-effective option for budget-sensitive off-grid applications
  • Gel batteries—deep cycle, suitable for moderate temperature environments
  • Tubular OPzS flooded batteries—for large-capacity industrial and telecom off-grid installations
  • Modular battery systems—stackable units allowing capacity expansion without system redesign

Battery System Design

  • Battery capacity calculation based on usable capacity, depth of discharge, and required autonomy
  • Battery room or enclosure design—ventilation, temperature management, and safety compliance
  • Battery Management System (BMS) integration for cell-level monitoring and protection
  • DC protection—fusing, isolators, and overcurrent protection devices
  • Compatibility verification with chosen inverter/charger
  • Cycle life and total cost of ownership analysis presented to client before purchase

Solar Maintenance

Protecting your investment—ensuring your system generates what it was designed to generate, every day.

A solar system is not a fit-and-forget installation. Dust accumulation on panels—a significant issue in Pakistan’s arid and dusty conditions—can reduce energy generation by 15 to 30% within weeks of installation without regular cleaning. Inverter faults, loose DC connections, degraded bypass diodes, corroded cable terminations, and battery capacity loss are all issues that develop silently and are only detected through structured monitoring and periodic inspection. Mosam Engineering provides comprehensive solar maintenance programs that protect the long-term energy yield, equipment warranty validity, and return on investment of every solar system we install—and systems installed by others.

Our Solar Maintenance Services

  • Panel cleaning—deionized water washing to remove dust, bird droppings, and surface contaminants
  • Visual inspection of panel surfaces, frames, and mounting structures for damage or corrosion
  • DC connection inspection—torque verification and thermal imaging for hot spots
  • Inverter inspection—fault log review, firmware update, and cooling system check
  • Battery health check—state of charge, state of health, and cell balance verification
  • Generation performance analysis—actual vs. expected output review with irradiation data
  • Earthing and lightning protection system inspection
  • Full written maintenance report with findings and recommendations after every visit

Maintenance Plans Available

  • Quarterly Maintenance Plan: Four visits per year—panel cleaning, full inspection, and performance review
  • Bi-Annual Maintenance Plan: Two visits per year—recommended minimum for commercial and industrial systems
  • Annual Maintenance Plan: One comprehensive inspection and cleaning visit per year
  • AMC with Priority Response: Structured annual contract with SLA-backed fault response for critical installations 

 

Clients enrolled in Mosam Engineering’s solar maintenance programs benefit from priority fault response, discounted spare parts pricing, and a dedicated technical account manager. Every maintenance visit is documented with a signed service report that supports warranty claims and provides an auditable performance record for the system’s lifetime.

Additional Solar Services

Solar System Audit and Performance Assessment

For existing solar installations that are underperforming—whether newly installed by another contractor or systems that have been in service for several years—Mosam Engineering provides independent technical audits. We assess panel condition, inverter performance, DC string voltages, battery health, mounting integrity, and monitoring data to identify the root causes of underperformance and recommend targeted corrective actions. Our audits are instrument-based and data-driven, not visual-only.

Net Metering Application and NEPRA Compliance

Navigating the net metering approval process with NEPRA and the relevant DISCO can be complex and time-consuming. Mosam Engineering manages the complete net metering application process on behalf of our clients—from the initial technical feasibility assessment and single-line diagram preparation, through the DISCO application submission and inspection, to final approval and bi-directional meter installation. We have extensive experience with LESCO, IESCO, FESCO, HESCO, PESCO, and QESCO and understand the specific documentation and procedural requirements of each distribution company.

Solar for HVAC—Integrated Energy Solutions

As both HVAC and solar specialists, Mosam Engineering is uniquely positioned to design integrated energy solutions where solar generation is specifically sized and optimized to power HVAC loads—the single largest electricity consumer in most commercial and residential buildings in Pakistan. By combining solar system design with HVAC energy auditing, we deliver holistic solutions that maximize the offset of the highest-cost electricity consumption in your building, delivering the fastest possible payback on both investments.

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Recognized and certified by leading industry standards

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How Our Solar Process Works

Every solar project at Mosam Engineering follows a clear and structured process—from initial feasibility through to commissioned system and long-term maintenance support.

  1. Site Assessment & Energy Audit—Our engineers visit your site, assess roof or ground space, shading conditions, and structural suitability, and analyze your electricity bills to build an accurate picture of your load profile and consumption patterns.
  2. System Design & Financial Proposal—We produce a complete system design using solar modelling software—including panel layout, inverter and battery selection, generation estimates, and a transparent financial projection with realistic payback calculations and no inflated figures.
  3. Supply & Installation—Our certified solar engineers manage the complete supply chain and carry out the full installation—mounting structures, panels, DC wiring, inverters, batteries, and AC interconnection—to IEC standards and manufacturer specifications.
  4. Net Metering Application—Where applicable, we manage the complete NEPRA net metering application and DISCO liaison process on your behalf, handling all documentation, inspections, and bi-directional meter installation through to final approval.
  5. Commissioning & Handover—Every system is fully commissioned, tested, and verified against design performance before handover. We set up your monitoring app or portal, walk you through system operation, and issue all warranty documentation and commissioning certificates.
  6. Ongoing Maintenance & Support—Structured maintenance programs, panel cleaning schedules, inverter monitoring, and priority emergency support protect your system’s performance and your return on investment throughout its operational life.

Why Clients Across Pakistan Choose Mosam Engineering for Solar

  • Engineering-Led Design: Every system is sized using solar modelling software and verified energy consumption data—never oversized for commission
  • Honest Capacity Advice: We present realistic generation estimates and payback calculations based on actual irradiation data for your location
  • Certified Installation Teams: Our solar engineers are trained and certified in DC and AC electrical installation and solar system commissioning
  • Net Metering Expertise: Full NEPRA and DISCO application management across all distribution companies in Pakistan
  • HVAC Integration Capability: Unique expertise in sizing solar specifically to offset HVAC energy consumption—Pakistan’s largest building load
  • Quality Equipment Only: We specify inverters and batteries from manufacturers with proven performance records and local warranty support
  • Full Project Delivery: Site assessment, design, supply, installation, net metering, commissioning, and maintenance—all under one roof

• Nationwide Coverage: Active across Karachi, Lahore, Islamabad, Rawalpindi, Peshawar, Quetta, Faisalabad, Multan, and beyond

Areas We Serve Across Pakistan

Mosam Engineering provides solar system services across all major cities and regions throughout Pakistan—from large commercial and industrial solar plants in the cities to off-grid agricultural and remote site installations across the country.

  • Karachi—Commercial, industrial, and residential solar installations across Pakistan’s highest solar-resource city, including large rooftop and ground-mounted systems
  • Lahore—On-grid, hybrid, and off-grid solar for corporate offices, factories, hospitals, educational institutions, and residential properties
  • Islamabad & Rawalpindi—Government buildings, commercial developments, embassies, and residential solar projects with full IESCO net metering support
  • Faisalabad—Industrial and commercial solar for textile and manufacturing sector clients—one of the highest electricity consumption zones in Pakistan
  • Peshawar—Commercial and residential solar installations with full PESCO net metering application management
  • Multan—Residential and commercial solar projects in one of Pakistan’s sunniest cities, with exceptional year-round solar generation potential
  • Quetta—Commercial, industrial, and off-grid solar installations across Balochistan
  • Agricultural & Rural Pakistan—Off-grid solar for tube wells, irrigation systems, farmhouses, and rural communities across Punjab, Sindh, and KPK

• Nationwide—Industrial zones, infrastructure projects, telecom installations, and remote site solar power systems across Pakistan

Client Testimonials Our Customers

Mosam Engineering is a trusted heating systems specialist in Pakistan—delivering outstanding results for clients across every sector and every region.

Speak to Our Solar Engineers. Today

Whether you are exploring solar for the first time, replacing an underperforming existing system, scaling up an existing installation, or integrating solar with your HVAC and energy management strategy, Mosam Engineering has the technical expertise and the honest approach to deliver a solution that genuinely works.

Contact our team to arrange a free site assessment and solar feasibility consultation. We will analyze your energy consumption, assess your solar resource, and provide a detailed, no-obligation system design and financial projection—with transparent assumptions, realistic outputs, and accurate payback calculations.

Frequently Asked Questions

What solar system services does Mosam Engineering provide?

Mosam Engineering provides a complete range of solar energy services in Pakistan—including on-grid, off-grid, and hybrid solar system design and installation; solar panel mounting; inverter and battery supply and installation; solar maintenance programs; independent system audits; and full NEPRA net metering application management. We serve residential, commercial, industrial, and agricultural clients across all major cities and regions throughout Pakistan.

An on-grid system connects to the national grid, uses no batteries, and is the most cost-effective option for properties with reliable grid access and daytime consumption. An off-grid system operates completely independently from the grid using battery storage—ideal for remote locations without grid access. A hybrid system combines both—connecting to the grid for net metering while also having battery storage to provide backup power during load shedding. In Pakistan’s current environment, hybrid systems are the most popular choice for consumers who want both bill savings and protection against load shedding.

Payback periods vary depending on system type, size, electricity tariff, and consumption profile. For correctly sized on-grid and hybrid systems in Pakistan’s current tariff environment, typical residential payback periods range from 3 to 5 years, and commercial and industrial systems often achieve payback in 2 to 4 years. Mosam Engineering prepares detailed financial projections with realistic generation estimates and transparent assumptions for every project—so you know what to expect before you commit.

Yes. Mosam Engineering manages the complete NEPRA net metering application process on your behalf—including technical feasibility assessment, single-line diagram preparation, DISCO application submission, inspection liaison, and bi-directional meter installation. We have experience with LESCO, IESCO, FESCO, HESCO, PESCO, and QESCO and understand the specific documentation and procedural requirements of each distribution company.

For inverters, Mosam Engineering recommends brands with proven performance records in Pakistan’s operating conditions and reliable local warranty support—including Huawei SUN2000, Sungrow, Fronius, SMA, Growatt, Sofar Solar, Deye, and Victron Energy. For batteries, we strongly recommend Lithium Iron Phosphate (LiFePO₄) chemistry for its cycle life, safety, and temperature tolerance—typically delivering 3,000 to 6,000+ cycles at 80% depth of discharge. We always present a total cost of ownership analysis before recommending a specific battery.

Yes. Mosam Engineering provides independent solar system audits for existing installations that are underperforming or experiencing faults. Our audits cover panel condition, DC string voltages, inverter performance, battery health, mounting integrity, and generation data analysis. We identify root causes of underperformance and carry out targeted repairs and remediation—regardless of who installed the original system.

Simply contact our team through our website or call our office directly. Our engineers will arrange a free site assessment and solar feasibility consultation—analyzing your electricity bills, assessing your roof or ground space, and providing a detailed system design and financial projection with no obligation.

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Mosam Engineering, D-13, Iqbal Boulevard,
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