The 36-State Nigerian Solar Radiation & PV Yield Benchmark
How much electricity will a solar panel array actually produce on your roof? An empirical state-by-state analysis of Global Horizontal Irradiation (GHI) and specific Photovoltaic Power Output (PVOUT) across Nigeria.
☀️ Key Geological Findings for Nigerian Solar Designers
Nigeria receives between 1,400 and 2,250 kWh/m² of solar radiation annually, with daily peak sunshine ranging from 4.0 Peak Sun Hours (PSH) in the Niger Delta to 6.5 PSH in the Far Northern Sahel.
Engineering Consequence: A 1kWp solar panel array in Sokoto or Kano generates approximately 1,780 to 1,920 kWh annually, whereas the exact same array in Ibadan or Lagos generates 1,460 to 1,540 kWh, and in Port Harcourt or Yenagoa generates 1,280 to 1,360 kWh. Installers in Southern Nigeria must size solar panel arrays 18% to 28% larger than northern installers to deliver identical daily energy.
1. Comprehensive 36-State & FCT Solar Yield Ranking
The table below categorizes every Nigerian state by its average daily Global Horizontal Irradiation (GHI), annual Specific Photovoltaic Electricity Yield ($PVOUT$ in kWh/kWp), and the recommended Array Sizing Multiplier relative to national baseline:
| Zone / State | Daily Irradiation (GHI) | Daily Peak Sun Hours (PSH) | Annual PV Yield (PVOUT) | Array Sizing Multiplier | Solar Viability Tier |
|---|---|---|---|---|---|
| Tier 1: Far North & Sahel (Maximum Solar Radiation) | |||||
| Sokoto, Kebbi, Zamfara | 6.1 – 6.4 kWh/m²/day | 5.8 – 6.2 hrs | 1,820 – 1,920 kWh/kWp | 1.00x (Baseline) | Exceptional |
| Kano, Katsina, Jigawa | 5.9 – 6.2 kWh/m²/day | 5.6 – 6.0 hrs | 1,780 – 1,880 kWh/kWp | 1.02x | Exceptional |
| Borno, Yobe | 6.0 – 6.3 kWh/m²/day | 5.7 – 6.1 hrs | 1,800 – 1,900 kWh/kWp | 1.01x | Exceptional |
| Tier 2: Middle Belt & North-Central (High Yield) | |||||
| Abuja FCT, Niger, Kaduna | 5.3 – 5.7 kWh/m²/day | 5.1 – 5.5 hrs | 1,620 – 1,740 kWh/kWp | 1.10x | Very High |
| Plateau, Bauchi, Gombe, Taraba | 5.4 – 5.8 kWh/m²/day | 5.2 – 5.6 hrs | 1,650 – 1,760 kWh/kWp | 1.08x | Very High |
| Kogi, Kwara, Benue, Nasarawa | 5.0 – 5.4 kWh/m²/day | 4.8 – 5.2 hrs | 1,540 – 1,650 kWh/kWp | 1.15x | High |
| Tier 3: Southwest Rainforest (Moderate-High Yield, High Commercial Demand) | |||||
| Oyo (Ibadan, Ogbomoso, Oyo town) | 4.8 – 5.2 kWh/m²/day | 4.7 – 5.0 hrs | 1,480 – 1,560 kWh/kWp | 1.22x | Solid Commercial |
| Lagos, Ogun (Abeokuta, Mowe-Ibafo) | 4.6 – 5.0 kWh/m²/day | 4.5 – 4.8 hrs | 1,420 – 1,510 kWh/kWp | 1.25x | Solid Commercial |
| Osun, Ondo, Ekiti | 4.7 – 5.1 kWh/m²/day | 4.6 – 4.9 hrs | 1,450 – 1,540 kWh/kWp | 1.23x | Solid Commercial |
| Tier 4: Southeast & South-South / Coastal Delta (Cloud & Rain Buffer Required) | |||||
| Enugu, Anambra, Imo, Abia, Ebonyi | 4.5 – 4.9 kWh/m²/day | 4.3 – 4.7 hrs | 1,380 – 1,490 kWh/kWp | 1.28x | Moderate |
| Edo, Delta, Cross River | 4.3 – 4.7 kWh/m²/day | 4.1 – 4.5 hrs | 1,320 – 1,440 kWh/kWp | 1.32x | Moderate |
| Rivers (Port Harcourt), Bayelsa, Akwa Ibom | 4.0 – 4.4 kWh/m²/day | 3.9 – 4.3 hrs | 1,260 – 1,360 kWh/kWp | 1.38x | Rain Buffer Needed |
2. How to Use the Array Sizing Multiplier (Engineering Rules)
If an installer in Abuja designs a system with 6x 550W panels (3,300W array) to power a 3.5kVA household, that exact same household in Lagos or Ibadan requires 8x 550W panels (4,400W array), and in Port Harcourt requires 8–9x 550W panels to generate the identical daily Watt-hours throughout June–August.
In Southern Nigeria (Latitude 4°–7°N), mount panels at a minimum 10° to 15° tilt angle (never flat 0°) to ensure rainwater washes off dust and organic moss.
In cloud-heavy states (Rivers, Lagos, Delta), specify N-Type TOPCon or Bifacial Monocrystalline panels which generate 8%–12% more energy under diffuse, overcast skies.
Fast-moving cloud transitions in the rainforest belt cause sudden irradiance swings. High-speed MPPT charge controllers prevent power tracking clipping.
Size Your System For Your Exact State
Our free interactive solar calculator automatically applies geographic derating factors across Southwest, North, and Niger Delta locations.
Authoritative Engineering Guides
Published by Reid Caster Publishing for Nigerian homeowners and solar engineers.
Power Without the Panic
Author: Reid Caster Publishing
Before you spend another Naira on solar, read this. The complete Nigerian buyer's guide to getting solar right the first time — without wasting money, getting scammed by fake lithium batteries, or buying the wrong system.
The Complete Nigerian Solar Sizing, ROI & Vetting Toolkit (All 4 Tools Bundle)
Publisher: Reid Caster Publishing
Get all 4 essential calculators, ROI simulators, and engineering inspection checklists used by smart homeowners and businesses to audit solar quotes and size their systems accurately.
- World Bank Group & ESMAP: Global Solar Atlas 2.0 (GSA), validated via Solargis high-resolution satellite irradiance models.
- NIMET (Nigerian Meteorological Agency): Annual Climate Review & Solar Radiation Monitoring Stations (Lagos, Ibadan, Abuja, Kano).
- ECN (Energy Commission of Nigeria): National Energy Masterplan & Renewable Resource Assessments.
- Editorial Analysis: Prepared by Reid Caster Publishing for IbadanSolarHub.com.ng (2026).