How to Know If Your Solar Installer Did a Bad Job

Let me be honest with you from the start…

A bad solar installation doesn’t always “fail” immediately.

Sometimes it works for a few days… even weeks… before problems start showing.

And that’s where people get confused.

On site, I’ve walked into many homes where the client said:

“The system is working but something just feels wrong.”

And they were right.

So in this guide, I’m going to show you real signs that your solar installer did a poor job—based on actual field experience, not theory.

1. YOUR BATTERY DRAINS TOO FAST (EVEN WHEN YOU DON’T USE MUCH POWER)

This is one of the first red flags I always check on site.

If your battery drops from 100% to 40% quickly, something is wrong.

A properly designed system should balance your usage.

What it usually means:

Installer undersized your battery

Panels are not charging properly

Wrong inverter configuration

Cheap or mismatched components

I once visited a client in Port Harcourt where the system was “full” in the morning…

But by 2pm, it was already low.

The issue?

👉 The installer used panels that couldn’t even match the battery capacity.

That’s a mismatch job.

2. YOUR LIGHTS FLICKER OR GO DIM RANDOMLY

This is not normal.

Solar power should be stable—just like PHCN (but better).

If your lights flicker, it usually means:

Loose wiring connections

Poor inverter setup

Undersized inverter

Bad earthing system

On site, I’ve opened inverter boxes and found wires loosely twisted like temporary work.

That’s not professional installation.

3. PANELS ARE NOT POSITIONED PROPERLY

This is a very common issue in Nigeria.

Solar panels must face the right direction and angle.

But bad installers often:

Mount panels flat on roofs without angle

Place panels facing the wrong direction

Block panels with shadows (trees, buildings, tanks)

Let me tell you something real:

I saw a system where 4 panels were installed under a water tank shade.

The client was wondering why “solar is weak.”

👉 It wasn’t solar that was weak—it was bad placement.

4. YOUR SYSTEM DOESN’T POWER BASIC APPLIANCES

A properly installed system should handle:

Fans

Lights

TV

Small fridge (depending on size)

But if your system struggles with basic loads, something is off.

Possible reasons:

Wrong inverter size

Cheap inverter brand

Poor battery quality

Installer did not calculate load properly

A good installer will ALWAYS calculate your load before installation.

If they didn’t ask you detailed questions about your appliances… that’s already a warning sign.

5. CABLES LOOK MESSY OR UNPROFESSIONAL

This is something many clients ignore—but it matters a lot.

On site, good solar work is easy to recognize:

✔ Clean cable routing

✔ Proper trunking or conduit

✔ Tight connections

✔ Neat arrangement around inverter

Bad installation looks like:

Hanging wires everywhere

Exposed joints

Tape instead of proper connectors

No proper cable protection

And let me be clear:

👉 Messy wiring = future fire risk

6. YOUR INVERTER SHOWS CONSTANT ERROR CODES

If your inverter keeps flashing errors, don’t ignore it.

Common causes:

Wrong configuration setup

Poor battery compatibility

Loose battery terminals

Overloaded system

I once checked a system where the inverter kept shutting down.

The installer simply told the client:

“It’s normal.”

No—it wasn’t normal.

It was overload caused by wrong design.

7. NO PROPER GROUNDING OR EARTHING SYSTEM

This is one of the most dangerous mistakes.

Proper solar installation MUST include grounding.

Without it:

Risk of electric shock increases

Lightning protection is weak

System lifespan reduces

On many sites, I’ve seen installers skip grounding just to “save time.”

That’s not professional work.

8. YOUR SYSTEM WORKS ONLY WHEN SUN IS STRONG

If your solar works only at peak sunlight (11am–2pm), something is wrong.

A good system should:

Charge during the day

Store energy properly

Supply power into the evening

If it dies early, it usually means:

Weak battery

Poor panel output

Bad charge controller or inverter setup

9. YOU WERE NOT GIVEN A PROPER LOAD DESIGN

This is very important.

Before installation, a professional should ask:

How many fans?

How many lights?

Do you use fridge?

Any heavy appliances?

If your installer just “guessed” the system size, that’s a problem.

A solar system is NOT guesswork.

It is engineering.

10. CHEAP COMPONENTS WERE USED WITHOUT TELLING YOU

Some installers mix things up silently.

You paid for premium quality… but got:

Weak panels

Low-grade batteries

Fake or refurbished inverter

On site, I’ve opened systems where labels were removed or replaced.

The client had no idea.

If your system looks “too cheap for the price you paid,” investigate it.

11. YOUR SYSTEM NEEDS CONSTANT RESETTING

If you are always:

Restarting inverter

Switching breakers

Troubleshooting daily

Then installation was not done correctly.

A properly installed system should run quietly in the background.

No stress. No drama.

12. NO AFTER-INSTALLATION SUPPORT

This is also a big sign of bad installer behavior.

After installation, a professional should:

Explain system operation

Give maintenance tips

Offer support if issues arise

If your installer disappears immediately after payment…

That’s a red flag.

REAL-LIFE FIELD EXPERIENCE (WHAT I OFTEN SEE ON SITE)

Let me share something real from field work.

I once visited a house where the client said:

“My solar is not strong anymore.”

When I checked the system:

Panels were dusty (never cleaned since installation)

One cable was loose

Battery was not properly balanced

Inverter settings were wrong

The system wasn’t bad…

👉 The installation was poorly done AND never maintained.

That’s a dangerous combination.

HOW TO AVOID BAD SOLAR INSTALLERS

If you are planning to install solar, here’s what you should always do:

Before installation:

Ask for full system design

Request load calculation

Confirm brands of components

Don’t rush cheap quotes

During installation:

Watch panel placement

Check cable neatness

Confirm grounding is done

After installation:

Test full system load

Ask for explanation

Monitor battery behavior

FINAL THOUGHT (VERY IMPORTANT)

A bad solar installation doesn’t always show immediately.

Sometimes it takes days, weeks, or months.

But the signs are always there if you know what to look for.

Solar is not just about “installing panels.”

It’s about:

Proper design

Proper load balancing

Proper wiring

Proper component matching

When done right, it gives you years of stress-free power.

When done wrong… it becomes frustration.

AUTHOR

Ekeson Collins

Solar Energy Consultant & Installer

Founder – Ekeson Energy Solution

Specialist in residential and commercial solar system design and installation in Nigeria