Harnessing Zambia’s 3000 Hours of Sunshine for Power Development

Country or Region Overview

Country or Region: Zambia

Capital: Lusaka

Total Population: Approximately 20 million (as of 2025)

Geographical Location: Zambia is a landlocked country in Southern Africa, bordered by Tanzania to the northeast, Malawi to the east, Mozambique to the southeast, Zimbabwe and Botswana to the south, Namibia to the southwest, Angola to the west, and the Democratic Republic of the Congo to the north. Known for its plateau terrain, abundant sunshine, and hydropower-dependent grid, Zambia is actively turning to solar energy to diversify its energy mix and improve electricity access, particularly in rural regions.

Solar resource map copyright at 2021 Solargis. Licensed under the Creative Commons Attribution license (CC BY-SA 4.0). This is a solar resource map from Solargis. For a higher resolution map, please visit and download.

Table of Contents

Solar Irradiation Data in Zambia

Zambia has strong and stable solar irradiation, suitable for a wide range of solar applications, including utility-scale plants, rural electrification, and commercial systems.

Key Solar Irradiation Data:

  • Annual Solar Irradiation: Ranges from 5.0 to 6.5 kWh/m²/day

  • Sunshine Hours: Approximately 2,800 to 3,200 hours/year

  • Best Locations: Eastern Province, Central Province, Southern Province, Muchinga, and Lusaka

These conditions provide an ideal environment for year-round solar energy generation.

If you need to learn more solar power potential in Zambia, please feel free to contact Solarvance for more details.

Temperature Factors in Zambia

Zambia has a subtropical climate moderated by elevation, with warm to hot temperatures, especially during the dry season.

  • Typical temperatures: Range from 20°C to 35°C

  • Cooler seasons: Occur between May and August, especially in higher elevation regions

System design considerations:

  • Use ventilated racking structures to dissipate heat

  • Place inverters and batteries in shaded or insulated enclosures

  • PV efficiency is generally high due to moderate thermal conditions

Energy Demand and Grid Situation in Zambia

Zambia’s national electrification rate is around 40%, with rural areas below 15%, leaving millions without access to electricity.

  • Grid operator: ZESCO (Zambia Electricity Supply Corporation Limited)

  • Main generation source: Hydropower (~80%), which is vulnerable to drought

  • Grid access: Strong in urban zones, limited in distant rural areas

Solar energy is critical for addressing energy deficits and increasing climate resilience.

Preferred System Type in Zambia

Zambia’s varied energy needs and infrastructure gaps support multiple solar configurations:

  • Off-Grid Solar Systems: For households, health centers, schools, and agriculture

  • Mini-Grids: For rural trading centers, farming cooperatives, and island communities

  • Hybrid Systems: For commercial buildings, telecom towers, and NGO facilities

  • Utility-Scale PV Plants: Developed near urban load centers and for grid diversification

Battery storage is essential in off-grid and load-shedding-affected regions.

Dust and Sand Factor in Zambia

Dust is a moderate concern, particularly during the dry season (May to October) in Southern and Central Zambia.

Recommendations:

  • Clean panels every 2–4 weeks during dry months

  • Use angled racking to support natural rainfall cleaning

  • Avoid placing installations close to unpaved roads or bare agricultural land

Rainy seasons naturally help reduce dust buildup.

Humidity and Rainfall (Humidity Factor) in Zambia

Zambia experiences seasonal rainfall, especially during the wet season (November to April), and moderate humidity throughout the year.

  • Humidity: Typically ranges from 50% to 85%

  • Annual rainfall: 700 mm to over 1,200 mm, depending on the region

Protection strategies:

  • Use IP66-rated enclosures for sensitive components

  • Install systems on elevated foundations in flood-prone areas

  • Ensure drainage design in racking and mounting

Humidity is generally manageable with proper design.

Ocean (Salt Corrosion Factor) in Zambia

Zambia is landlocked, and therefore has no exposure to ocean-related salt corrosion.

Standard corrosion protection is sufficient for all regions.

Government Policies and Solar Incentives in Zambia

Zambia has a clear renewable energy strategy, with support from international donors and private sector partnerships.

Key highlights:

  • Scaling Solar Initiative (IFC/World Bank) has led to operational utility-scale PV plants

  • Government goal: Increase renewable energy contribution and rural access

  • Tax and duty exemptions for renewable energy equipment under certain conditions

  • Support from AfDB, GIZ, USAID, and Power Africa

  • Increasing support for private mini-grid developers and rural solar entrepreneurs

Zambia’s policy environment encourages clean energy investment and innovation.

ROI on Solar Systems in Zambia

Solar projects in Zambia offer strong ROI, especially where systems replace diesel use or offset grid unreliability.

  • ROI Period:

    • SHS and small off-grid systems: 2–3 years

    • Mini-grids and commercial hybrid systems: 4–6 years

  • Post-ROI Benefits: Reliable energy, fuel savings, and service expansion

  • Financing Access: Available through donor grants, development banks, and climate funds

Solar helps unlock economic opportunity and social development, especially in rural regions.

Conclusion on Solar Power in Zambia

Zambia is a rising solar market with abundant sun, strong demand, and expanding policy support. From urban rooftops in Lusaka to mini-grids in Eastern Province, solar power is helping Zambia increase access, reduce grid pressure, and build energy resilience.

At Solarvance, we offer reliable, heat-tolerant, and easy-to-deploy solar systems for Zambia’s varied energy needs. Whether powering a health post in Chipata, a school in Mongu, or a business in Ndola, our solutions are designed for durability, efficiency, and long-term savings.

Choose Solarvance for Your Solar System

Contact us today to explore customized solar solutions for your needs, whether you’re interested in grid-connected, off-grid, or hybrid solar systems. Our team at Solarvance is here to guide you through every step of the process, from system design to installation and maintenance.

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