A 200kWh Integrated Solar and Battery Storage System in Cameroon with 4 three-phase inverters

Delivering Reliable 24/7 Clean Power for a Large Residential Complex

Across West Africa, access to stable and reliable electricity remains a critical challenge for residential and commercial developments. In countries such as Cameroon, rapid urban growth often places heavy pressure on public power grids, leading to voltage fluctuations and unplanned outages, especially during peak demand periods.

This integrated solar and energy storage project was developed to address these challenges by providing a continuous, independent, and sustainable power supply for a large residential complex. The system was designed to ensure stable operation day and night while significantly reducing reliance on the public grid and diesel generators.

Project Overview

• Location: Cameroon, Central-West Africa, neighboring Nigeria, Gabon, and Equatorial Guinea
• Application: Large residential complex consisting of three buildings and shared public areas
• Power Supply Objective: 24/7 uninterrupted electricity with improved energy independence and system reliability

System Scale and Key Technical Specifications

The project adopts a solar-first architecture supported by a robust energy storage system. This design ensures efficient daytime energy generation while maintaining stable power supply during nighttime and grid instability.

• Installed PV Capacity: 60 kWp (based on rated module power under standard test conditions)
• Energy Storage Capacity: 200 kWh
• Maximum System Output Power: Up to 95 kW through coordinated operation of solar generation and battery storage

The system’s peak output capability is designed to handle simultaneous residential loads during high-demand periods and should not be interpreted as the photovoltaic installed capacity alone.

Main System Components

Inverter System

• Four MOTOMA three-phase inverters
• Rated power: 15 kW per unit
• Supports parallel operation for multi-building power distribution
• Compatible with on-grid, off-grid, and hybrid operating modes
• Engineered for stable performance under weak grid conditions commonly found in West Africa

Photovoltaic Modules

• Total quantity: 152 solar panels
• Rated power: 620 W per panel
• High power density reduces installation area requirements
• Optimized for high solar irradiation environments such as Cameroon, Ghana, Benin, and Togo

Energy Storage System

• Ten MOTOMA M91 PRO lithium battery units
• Capacity: 20 kWh per battery
• Ensures nighttime power supply and backup during grid outages
• Provides peak shaving and load balancing for improved system efficiency

Operational Performance and Project Value

Since commissioning, the system has demonstrated stable and reliable operation, delivering tangible benefits to the residential complex.

• Continuous power supply is maintained even during public grid interruptions
• Solar energy now serves as the primary power source, with storage supporting load regulation and backup
• Operating costs are significantly reduced compared to diesel-based power solutions
• The system architecture is highly replicable for residential and commercial projects in Douala, Yaoundé, and other West African cities

Project Significance

In West Africa, the value of clean energy solutions extends beyond environmental benefits. Reliable power availability is a fundamental requirement for quality of life and sustainable urban development. This project demonstrates that, with proper system design and mature energy storage technology, solar power can serve as a stable and dependable primary energy source rather than a supplementary option.

Local Presence and Long-Term Service Support

Beyond system performance, successful project delivery and long-term operation depend on strong local support capabilities. For this project, MOTOMA maintains local warehousing facilities in Cameroon, enabling fast access to equipment and spare parts while reducing delivery and maintenance risks.

Installation and commissioning were carried out by experienced local technical teams familiar with regional grid conditions, construction environments, and regulatory requirements. In addition, MOTOMA provides on-site after-sales service and technical support, ensuring timely maintenance, inspections, and operational assistance throughout the system’s lifecycle.

This integrated service model—combining reliable equipment, local inventory, professional installation, and responsive after-sales support—offers long-term assurance for residential and commercial energy projects across Cameroon and the wider West African region, including Nigeria, Benin, and Togo.