Common Solar Panel Problems Detected Using an MPPT Tester Malaysia
Common Solar Panel Problems Detected Using an MPPT Tester Malaysia
Introduction
Solar photovoltaic (PV) systems are designed to provide reliable and long-term energy production. However, even high-quality solar panels can experience performance issues over time due to environmental conditions, ageing, installation errors, or electrical faults.
Many of these problems cannot be identified by checking voltage alone. A solar panel may still display normal voltage while producing significantly less power than expected.
The FUZRR FR705 Solar MPPT Power Tester helps installers and maintenance engineers quickly evaluate the actual working performance of a solar panel by measuring its Maximum Power Point (MPP).
1. Dirty Solar Panels
Dust, leaves, bird droppings, and industrial pollution can block sunlight from reaching the solar cells.
Symptoms
Reduced daily energy production
Lower maximum output power
Uneven performance between panels
Solution
Clean the panel surface and retest using the FR705 to confirm whether power output has improved.
2. Partial Shading
Shadows from trees, nearby buildings, antennas, or roof structures can greatly reduce solar panel efficiency.
Symptoms
Sudden reduction in power generation
One panel producing much less than others
Lower MPPT power readings
Solution
Remove the shading source if possible or redesign the panel layout for better sunlight exposure.
3. Ageing Solar Panels
All photovoltaic panels gradually lose efficiency over years of operation.
Symptoms
Lower output compared with original specifications
Stable voltage but reduced power
Gradual decline in energy production
Solution
Compare measured output with historical maintenance records to determine whether replacement should be considered.
4. Loose or Damaged MC4 Connectors
Poor electrical connections increase resistance and reduce power transfer.
Symptoms
Intermittent output
Voltage appears normal
Current and power are lower than expected
Solution
Inspect all connectors, cables, and terminals before retesting.
5. Internal Cell Damage
Micro-cracks, moisture ingress, or damaged bypass diodes may not be visible from the outside.
Symptoms
Unexpected loss of power
Uneven performance between identical panels
Stable voltage with poor output power
Solution
Use the FR705 to compare suspected panels with known good panels under the same sunlight conditions.
6. Incorrect Installation Angle
Solar panels installed at an unsuitable tilt angle or orientation receive less sunlight throughout the day.
Symptoms
Lower daily energy production
Reduced afternoon or morning performance
Lower measured maximum power
Solution
Adjust the installation angle where practical and verify improvement with another MPPT test.
Why Use the FUZRR FR705?
The FR705 provides a fast and convenient way to evaluate solar panel performance on-site.
Key advantages include:
Auto and Manual testing modes
Large LCD display
Portable design
Maximum Power Point (MPP) testing
Reverse polarity protection
Over-voltage protection
Over-current protection
Over-temperature protection
Overload protection
It is suitable for both routine inspections and troubleshooting work.
Applications
The FR705 is widely used by:
Solar installation contractors
Solar maintenance companies
Facility management teams
Renewable energy consultants
Government agencies
Engineering service providers
Technical colleges and training centres
Why Buy from MTM Precision?
MTM Precision Sdn Bhd supplies professional solar testing equipment and industrial measurement solutions throughout Malaysia.
Our advantages include:
Professional technical consultation
Ready stock for selected models
Fast delivery across Malaysia
Reliable after-sales support
Calibration and testing solutions
Wide range of electrical and solar instruments
Contact MTM Precision
MTM Precision Sdn Bhd
🌐 Website: www.mtmpre.com.my
📧 Email: mtmpre@yahoo.com
📱 WhatsApp: +6016-660 7346
Looking for a reliable solution to diagnose solar panel performance? Contact MTM Precision Sdn Bhd today to learn more about the FUZRR FR705 Solar MPPT Power Tester and our professional solar testing instruments available throughout Malaysia.
03 Aug 2026
