Uzokwe Reload Services

01/08/2026

Benefits of the Installation

- Reliable power supply

- Reduced dependence on the utility grid

- Lower electricity bills

- Silent operation

- Automatic power changeover

- Improved battery life through intelligent charging

- High conversion efficiency

- Enhanced electrical safety

- Reduced maintenance requirements

- Operational flexibility through the bypass system

- Protection against electrical faults and voltage surges

12. Maintenance Recommendations

To maintain optimum system performance, the following maintenance practices are recommended:

- Clean the solar panels regularly to remove dust and debris.

- Inspect all electrical connections periodically.

- Test protective devices and circuit breakers routinely.

- Monitor battery voltage and charging performance.

- Avoid connecting loads beyond the inverter's rated capacity.

- Ensure adequate ventilation around the inverter and batteries.

- Inspect the earthing system annually.

- Schedule periodic preventive maintenance by qualified personnel.

13. Conclusion

The installation of the 4.2 kVA, 24 V Hybrid Solar Power System comprising six (6) 600 W photovoltaic modules, two (2) 12 V 200 Ah gel batteries connected in series, and a 4.2 kVA hybrid inverter has successfully provided the client with a dependable and efficient renewable energy solution for essential electrical loads.

The incorporation of comprehensive DC and AC protection devices, isolators, circuit breakers, surge protection, and a properly designed earthing and grounding system ensures safe, reliable, and long-term operation. Additionally, the inclusion of a manual bypass facility offers the flexibility to power essential load circuits directly from the utility grid during maintenance or whenever solar backup is not required, while still allowing the batteries to charge.

Overall, the installed system is expected to deliver improved energy reliability, reduced dependence on the utility grid, enhanced equipment protection, and lower operating costs, making it a practical and sustainable power solution for the client's essential electrical needs.

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9. Bypass Facility

A manual bypass arrangement was incorporated into the installation.

This allows the client to supply the essential load circuits directly from the utility grid whenever desired while keeping the hybrid inverter connected for battery charging.

The bypass system provides several operational advantages:

- Continuous electricity during inverter servicing

- Simplified maintenance without interrupting power to loads

- Operational flexibility

- Ability to isolate the inverter when necessary

- Battery charging from the grid while loads remain energized

This feature enhances overall system reliability and user convenience.

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10. System Operation

During Daylight

- Solar panels generate electricity.

- Solar power supplies the connected loads.

- Excess energy charges the batteries.

- The utility grid remains on standby unless required.

During Cloudy Conditions

- Solar power supplements the loads.

- Batteries provide additional energy if solar generation is insufficient.

- Grid power is used automatically when necessary.

During Utility Power Failure

- The inverter automatically switches to battery power.

- Essential loads continue operating without interruption.

- Solar panels continue supplying energy whenever sunlight is available.

During Utility Power Restoration

- The inverter automatically reconnects to the grid.

- Battery charging resumes if required.

- Solar power remains the primary energy source whenever available.

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Hybrid Inverter

Specification           | Value

Type                          | Hybrid Inverter

Rated Capacity       | 4.2 kVA

Battery Voltage       | 24 VDC

Output Voltage        | 230 VAC

Output Frequency   | 50 Hz

Functions include:

- Solar MPPT charging

- Battery charging

- Automatic source selection

- Grid charging

- Pure sine wave AC output

- Intelligent battery management

- Overload protection

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Battery Bank

Component    | Specification  | Quantity

Gel Battery     | 12 V, 200 Ah    | 2

Battery Connection:

The two batteries were connected in series to obtain:

- Voltage = 24 V

- Capacity = 200 Ah

Stored Energy:

24 V × 200 Ah = 4,800 Wh (4.8 kWh)

The battery bank provides backup energy whenever solar energy is unavailable and the utility supply fails.

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4. Solar Array Configuration

The six photovoltaic modules were configured to suit the operating voltage and MPPT requirements of the hybrid inverter.

The configuration ensures:

- Maximum solar energy harvesting

- Reduced cable losses

- Stable charging voltage

- Efficient MPPT operation

The panels were securely mounted on a durable roofing support structure and positioned to minimize shading while maximizing exposure to sunlight.

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2. Project Objectives

The primary objectives of the installation are to:

- Provide uninterrupted electricity for the client's essential loads.

- Reduce dependence on the public utility grid.

- Lower electricity costs through solar energy utilization.

- Provide automatic backup during grid failures.

- Maximize battery lifespan through intelligent charging.

- Protect equipment against electrical faults and surges.

- Ensure safe operation in accordance with electrical engineering best practices.

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3. System Components

Solar PV Array

Component| Specification| Quantity

Solar Panels| 600 W Monocrystalline PV Module| 6

Total Installed PV Capacity:

600 W × 6 = 3,600 W (3.6 kWp)

The PV array supplies energy directly to the hybrid inverter while charging the battery bank.

01/08/2026

DETAILED TECHNICAL REPORT ON THE INSTALLATION OF A 4.2 kVA HYBRID SOLAR POWER SYSTEM

Project Title

Installation of a 4.2 kVA / 24 V Hybrid Solar Power System with 3.6 kWp Photovoltaic Array and 4.8 kWh Battery Bank

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1. Introduction

This report presents the installation of a 4.2 kVA, 24 V Hybrid Solar Power System designed to provide a reliable, efficient, and uninterrupted electricity supply to the client's essential household loads.

The system utilizes solar photovoltaic (PV) energy as its primary power source during daylight hours while storing excess energy in a battery bank for use during periods of low solar generation and utility power outages.

The installation integrates:

- Six (6) 600 W Monocrystalline Solar Panels

- One (1) 4.2 kVA / 24 V Hybrid Inverter

- Two (2) 12 V 200 Ah Gel Batteries connected in series

- Complete DC and AC Protection Systems

- Earthing and Grounding Network

- Manual Bypass Facility

- Utility Grid Charging Capability

The hybrid configuration automatically prioritizes solar energy while seamlessly switching between solar, battery, and utility power whenever required.

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Solar Power System Installation Report

Project Overview

A 2 kWh, 500 W solar generator was installed together with a 650 W photovoltaic (PV) solar panel to provide a reliable and uninterrupted power supply for the client's essential household electrical loads during daylight hours and as backup during grid power outages.

The system was specifically designed to power low- to medium-power appliances, including:

LED lighting circuits

Television sets

Electric fans

Phone and laptop chargers

Internet routers

Decoders

Other compatible household electronic gadgets

To ensure optimum system performance, maximize battery life, and prevent overloading, high-power appliances such as air conditioners, refrigerators, electric cookers, water heaters, pressing irons, pumping machines, and similar heavy loads were intentionally excluded from the solar backup circuit.

System Components

The installed system consists of:

1 × 2 kWh, 500 W Solar Generator

1 × 650 W Bifacial split type PV Solar Panel

Bypass Changeover Switch (ATS)

Appropriate DC and AC protection devices

Circuit breakers

Earthing and grounding system

Interconnecting cables and accessories

System Operation

The 650 W PV panel converts sunlight into electrical energy, which is supplied to the solar generator for battery charging and to power connected loads during the daytime.

When utility (grid) power is available, the solar generator automatically charges its internal battery, ensuring it remains fully charged and ready for backup operation. This automatic charging process requires no manual intervention.

Bypass Function

The installation also incorporates a bypass facility, allowing the client to power the selected household circuits directly from the utility grid whenever desired while the solar generator remains connected for battery charging.

This feature provides operational flexibility during maintenance, servicing, or periods when the solar backup system is not required, ensuring uninterrupted electricity supply to the connected loads.

Protection and Safety

To ensure safe and reliable operation, appropriate electrical protection devices were installed th

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Manual Bypass Facility

The installation also incorporates a manual bypass facility, providing additional operational flexibility.

This arrangement allows the client to supply the connected load circuits directly from the utility grid whenever required while leaving the solar system energized for battery charging.

The bypass facility is particularly beneficial during:

- Preventive maintenance

- Inverter servicing

- System inspection

- Equipment replacement

- Software upgrades

- Emergency troubleshooting

This configuration ensures uninterrupted electricity supply to the client's business operations even when the solar backup system is temporarily isolated.

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Battery Storage System

A high-performance 10kWh lithium battery was installed to provide reliable energy storage for backup operation.

The battery system offers:

- Long cycle life
- High charging and discharging efficiency
- Fast charging capability
- Stable voltage output
- Intelligent Battery Management System (BMS)
- Deep discharge protection
- Overcharge protection
- Temperature monitoring
- Short-circuit protection
- Cell balancing for maximum lifespan

The battery storage ensures continuous operation of the client's essential business equipment during utility outages while maximizing the utilization of harvested solar energy.

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Hybrid Inverter Performance

The installed 5kVA Hybrid Inverter serves as the central control unit of the entire solar power system.

Its functions include:

- Solar energy conversion
- Battery charging management
- Battery discharge management
- Grid synchronization
- Automatic source prioritization
- Real-time monitoring
- Overload protection
- Short-circuit protection
- Over-temperature protection
- Low battery shutdown protection
- Intelligent energy management

The inverter continuously optimizes energy usage to maximize solar utilization while protecting all connected equipment.