Project Details

Location: Zimbabwe
Application: Solar PV + Energy Storage + Diesel Generator Microgrid for mining

Installed Capacity:

• Phase 1: 12 MWp Solar PV + 3 MW / 6 MWh Energy Storage
• Phase 2: 9 MW / 18 MWh Energy Storage

System Components:

• 12 MWp photovoltaic modules

• 2 customized battery energy storage containers with a combined capacity of 3.096 MWh

Project Background

The mining site previously depended entirely on 18 diesel generators for power supply, resulting in extremely high energy costs—up to USD 0.44 per kWh. These costs were further driven by fuel price volatility, complex logistics, and ongoing labor requirements.

Although grid electricity was available at a much lower tariff (USD 0.14 per kWh), unstable grid supply limited its usability and posed operational risks to continuous mining activities.

Integrated Microgrid Solution

To address both cost and reliability challenges, the project implemented a smart hybrid microgrid system combining solar PV, battery energy storage, diesel generators, and grid access.

The system is configured to prioritize solar power during daytime operations, store surplus energy in batteries, and supply stable electricity at night or during unfavorable weather conditions. Diesel generators are retained as a backup resource, ensuring uninterrupted power under all scenarios.

Project Benefits

• Approximately 80,000 kWh of electricity saved per day

• Estimated annual cost reduction of USD 3 million

• Payback period of less than 28 months

Project Impact

By transitioning from diesel-dependent power generation to a renewable-led hybrid microgrid, the mining operation significantly reduced energy costs, improved power reliability, and laid the foundation for long-term sustainable operations.