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Sunday, August 10, 2025

Step-by-Step Guide to Switching to Solar in Nigeria (System Sizing, Budget & Installer Selection)

In Nigeria today, almost everyone has a story about electricity problems.
Some people complain about constant blackouts. Others spend huge amounts on petrol or diesel just to keep their generators running. And many businesses lose productive hours because power suddenly goes off.
Over the past few years working in solar installation, I’ve had many conversations with homeowners and business owners who are tired of this situation. The interesting thing is that most of them are already thinking about solar energy — they just don’t know where to start.
One client once told me, “I want solar, but the information online is confusing. Everyone is saying different things.”
That’s exactly why this guide exists.
If you’re thinking about switching to solar in Nigeria, this article will walk you through the real process step by step, based on practical field experience and common issues people face when installing solar systems.
Step 1: Understand Your Power Needs (Load Assessment)
The very first step before installing solar is understanding how much electricity you actually use.
You’d be surprised how many people skip this step. They simply ask for a “5kVA system” or a “10kVA inverter” because someone recommended it.
But solar systems should never be based on guesswork.
Whenever I start a project, I ask the client to list the appliances they want to power.
Typical household appliances include:
Refrigerators
Televisions
Lighting
Fans
Air conditioners
Water pumps
Washing machines
Office equipment
Each appliance consumes a certain amount of electricity.
For example:
LED bulb: 10–15 watts
Refrigerator: 150–300 watts
Air conditioner: 1000–2000 watts or more
Once we calculate the total power demand, we can determine the right inverter size and battery capacity.
Skipping this step often leads to two major problems:
• The system becomes too small, causing overload issues.
• Or the system becomes too expensive, because it was oversized unnecessarily.
A proper load assessment saves money and ensures the system performs well.
Step 2: Decide What You Want Solar to Power
Not every solar system needs to power the entire house.
Many people start by powering essential appliances only.
For example:
Lighting
TV
Fans
Refrigerator
Phone and laptop charging
This approach keeps the system affordable while still providing reliable electricity during outages.
I remember one homeowner who initially wanted solar for his entire house, including two air conditioners.
After we calculated the cost, he realized it was beyond his budget.
So we redesigned the system to power only essential loads.
The result? He still enjoys stable electricity at night without running his generator constantly.
Solar systems can always be expanded later if needed.
Step 3: Choose the Right Type of Solar System
In Nigeria, there are generally three types of solar systems.
1. Off-Grid Systems
These systems operate completely independent of public electricity.
They rely entirely on:
Solar panels
Batteries
Inverters
Off-grid systems are common in areas where grid electricity is extremely unreliable or unavailable.
2. Hybrid Systems
Hybrid systems combine solar panels, batteries, and grid electricity.
During the day, solar panels power the house and charge the batteries. At night, the batteries provide electricity.
If the batteries become low, the system can switch to grid power automatically.
Hybrid systems are currently the most popular option in Nigeria.
3. Grid-Tied Systems
These systems connect directly to the public electricity grid without batteries.
They are common in countries with stable electricity, but they are less common in Nigeria because blackouts are frequent.
Step 4: Budget Planning for Solar Installation
One of the biggest concerns people have is cost.
Solar systems require an initial investment, but they reduce electricity expenses over time.
The total cost depends on several factors:
Size of the system
Battery capacity
Type of inverter
Quality of solar panels
Installation complexity
For example, a small backup system might cost a few hundred thousand naira, while a large residential or commercial system may cost several millions.
One thing I always tell clients is this:
Cheap solar often becomes expensive later.
I’ve inspected several systems where low-quality equipment failed within a year. The client ended up spending more money replacing components.
When budgeting for solar, it’s better to focus on reliability and long-term performance, not just the cheapest price.
Step 5: Select Quality Solar Equipment
A solar system is only as good as its components.
The main parts include:
Solar panels
Inverter
Batteries
Mounting structures
Electrical protection devices
Some of the problems I’ve seen during inspections include:
• Fake solar panels with unrealistic ratings
• Low-quality batteries that fail quickly
• Poor wiring installations
• Missing surge protection devices
Solar equipment should always come with manufacturer warranties and proper documentation.
Reliable components ensure the system lasts many years.
Step 6: Choosing the Right Solar Installer
This step is extremely important.
A good solar installer can design a system that performs well for years. A poor installer can cause endless problems.
Unfortunately, the solar market has many inexperienced technicians.
Some warning signs to watch out for include:
No proper load assessment
Extremely cheap quotations
No explanation of system design
Lack of warranty support
A professional installer should be able to explain:
System capacity
Battery backup duration
Equipment specifications
Maintenance requirements
I always encourage clients to ask questions before making a decision.
Solar installation is not something you want to redo after a few months.
Step 7: Installation and Testing
Once everything is planned, the installation process begins.
A proper installation usually involves:
Mounting solar panels securely
Running DC and AC cables safely
Installing the inverter and batteries
Connecting protection devices
Configuring inverter settings
After installation, the system must be tested under real conditions.
For example, during one installation I handled for a small business, we intentionally turned on several appliances at once to check how the system responded to surge loads.
Testing helps confirm that everything works as expected.
Step 8: Learn How to Maintain Your Solar System
Solar systems require very little maintenance, but they are not completely maintenance-free.
Simple practices help keep the system running smoothly.
These include:
Cleaning solar panels periodically
Monitoring battery health
Checking for loose connections
Watching inverter alerts
Dust buildup, especially during harmattan, can reduce panel efficiency slightly.
Cleaning panels every one or two months usually solves this problem.
Common Mistakes People Make When Switching to Solar
Over the years, I’ve seen several mistakes that cause frustration for solar users.
Some of the most common ones include:
Ignoring load calculations
This often leads to overloaded inverters.
Choosing the cheapest installer
Low prices sometimes mean poor equipment or poor installation.
Expecting unlimited power
Solar systems must still be designed according to realistic energy needs.
No after-sales support
Solar is a long-term system. Installer support matters.
Avoiding these mistakes can save a lot of money and stress.
Final Thoughts
Switching to solar energy in Nigeria is one of the smartest decisions many homes and businesses are making today.
With rising fuel costs and unstable electricity supply, solar offers a more reliable and predictable source of power.
However, the success of a solar system depends on proper planning, correct system sizing, quality equipment, and professional installation.
When these factors are handled correctly, solar energy can provide stable electricity for many years while reducing dependence on generators and expensive fuel.
For many Nigerians, it is not just about saving money — it’s about gaining peace of mind and energy independence.
About the Author
Ekeson Collins
Founder of Ekeson Energy Solution
Solar Installer • Energy Consultant • Renewable Energy Advocate
Ekeson Collins shares practical knowledge from real solar installation projects to help Nigerian homes and businesses make informed decisions about solar energy and avoid common installation mistakes.

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