Introduction
Choosing the right solar panel size ensures your system meets your energy needs efficiently. Here’s how to calculate it step-by-step.
Step 1: Determine Daily Energy Use
Check your electricity bill for average daily consumption (in kWh). Example: 20 kWh/day.
Step 2: Estimate Sunlight Hours
In Nigeria, average sunlight is about 5 hours/day.
Step 3: Calculate Required Panel Capacity
Formula: Panel Size (kW) = Daily Energy Use ÷ Sunlight Hours
Example: 20 ÷ 5 = 4 kW total panel capacity.
Step 4: Add Efficiency Margin
Add 20% for losses → 4 × 1.2 = 4.8 kW.
Conclusion
For a home using 20 kWh/day, install about 4.8 kW of solar panels. Always consult a certified installer for final design.
