A PV solar combiner box is a critical component in any solar power system, responsible for consolidating multiple strings of solar panels into a single output. However, these boxes often experience faults and failures that can compromise system efficiency, safety, and longevity.
Common Problems in PV Solar Combiner Boxes
1. Loose or Corroded Connections
Poorly secured or oxidized terminals can lead to voltage drops, overheating, and even fire hazards.
2. Blown or Faulty Fuses
Overcurrent conditions, improper fuse ratings, or degraded fuse connections can cause interruptions in power flow.
3. MC4 Connector Failures
Mismatched or degraded MC4 connectors can create high-resistance points, leading to arcing and energy losses.
4. Water Ingress & Moisture Damage
Poor sealing or degraded gaskets can allow water to enter, leading to short circuits and corrosion.
5. Overheating & Thermal Damage
Excessive heat buildup from high currents or poor ventilation can damage internal components and reduce efficiency.
6. Faulty Surge Protection Devices (SPDs)
Ineffective or degraded surge protection can leave the system vulnerable to lightning and transient voltage spikes.
7. Grounding & Bonding Issues
Improper grounding can increase the risk of electrical faults and compromise system safety.
At AQ Electric, we specialize in testing, documenting, and maintaining PV solar systems according to IEC 62446-1 international standards. Our team ensures that your solar combiner boxes remain in peak condition by:
1- Comprehensive Testing & Inspection – Using advanced diagnostic tools, we identify faults before they lead to major failures.
2- Preventive Maintenance – Regular cleaning, tightening, and replacement of degraded components to prevent downtime.
3- Surge Protection & Grounding Solutions – Ensuring your system is safeguarded against voltage spikes and electrical hazards.
4- Thermal Imaging & Load Analysis – Detecting overheating and imbalance issues for optimal performance.
Don’t let combiner box issues compromise your solar investment. Contact AQ Electric today for expert maintenance.
For more information and requests you can reach us,,
Email: Aqatawneh@aqelectric.net
Mobile: +201151006630
+962795154126