1. Understanding Your Home’s Electricity Needs

Before estimating how many solar panels you need, determine your average daily energy usage. In most homes, this ranges between 20 to 40 kWh per day. You can check your utility bill or use a smart meter to get accurate numbers.

💡 Example: If your home uses 30 kWh/day, you’ll need a solar system that can produce that amount.

2. Solar Panel Output: What to Expect

A standard residential solar panel for home use typically produces between 1.5 to 2.5 kWh per day, depending on the wattage and sunlight hours. For instance, a 450W high-efficiency solar panel in a sunny region like Iraq or Iran can generate up to 2.2 kWh/day.

🧮 Basic Formula:
Daily Energy Needs ÷ Daily Output per Panel = Number of Panels30 kWh ÷ 2.2 kWh = ~14 panels

3. Key Factors That Affect Solar Panel Quantity

Roof size and orientation

Local sun exposure (solar insolation)

Panel efficiency (monocrystalline vs. polycrystalline)

Whether you're using a battery backup system

Your goal: full offset or partial savings?

4. Do You Need a Battery Backup?

Many homeowners now combine their systems with solar battery storage for home to ensure uninterrupted power during outages or at night. While this doesn’t change the number of panels directly, it affects the size of the inverter and total system design.

5. Off-Grid or Grid-Tied Solar Power Systems?

A grid-tied solar panel system allows you to feed excess energy into the grid.

An off-grid solar panel system for home use requires more panels and batteries to cover your entire load independently.

If you're in rural areas of Iraq or Iran where power outages are frequent, an off-grid setup may be ideal.

6. Recommended Steps Before Installation

Calculate your average electricity usage

Assess your roof space and sun exposure

Choose the right solar panel type and capacity

Work with a certified installer in your region

Conclusion: A Smart Investment for Energy Independence

Investing in solar panels isn’t just about cost savings—it’s about energy freedom. With the right system design, you can enjoy reliable, green electricity every day. Whether you're in urban Tehran or rural Basra, solar power is a smart solution for your home's energy needs.