FAQ 

If the MPPT input voltage range is lower than the maximum open-circuit voltage of the PV modules (especially at low temperatures), it may cause equipment damage;

Choose an MPPT controller with an input voltage range that covers the maximum open-circuit voltage of the PV modules at extreme low temperatures, and leave at least 10%-20% voltage margin。

Reverse polarity or poor grounding can cause short circuits or equipment failure.

Wire according to polarity markings during installation, use a grounding resistance tester to ensure reliable grounding, and install anti-reverse connection protection circuits.

Choose a suitable model based on the maximum power of the PV array and the open-circuit voltage under extreme temperatures, leaving a 10%-20% power margin.

Installing in a confined space can lead to poor heat dissipation, sunlight exposure can accelerate aging, and a humid environment can cause circuit corrosion.

Choose a well-ventilated, cool and dry location, away from flammable materials, and ensure at least 50cm of space around for heat dissipation.

Local shading or panel dirt can cause multiple peaks in the PV array’s power-voltage (P-V) curve, and traditional MPPT algorithms (such as perturbation and observation) may lock onto a local optimum instead of the global maximum power point. Use global scanning or intelligent optimization algorithms (such as particle swarm optimization or artificial neural networks) instead of traditional MPPT algorithms to accurately identify the global maximum power point among multiple peaks.

High ambient temperatures or dust blockage of cooling holes can trigger inverter overheating shutdown. Regularly clean cooling fans and air ducts, and install auxiliary cooling devices (such as external fans) in high-temperature areas.

MPPT tracking anomalies or communication interruptions can cause unstable inverter input power. Check the compatibility of MPPT and inverter communication protocols, and optimize signal shielding and anti-interference design.

Aging of capacitors, MOSFETs, and other components can lead to efficiency decline or functional abnormalities (such as inability to start). Regularly inspect and replace aging components, prioritize the use of industrial-grade long-life capacitors and MOSFETs, and enhance heat dissipation design to delay aging.

Unoptimized algorithms (such as inefficient MPPT logic) or security vulnerabilities can affect performance. Enable the automatic update function, and regularly upgrade firmware through the manufacturer’s software.

Failure to clean PV panels (accumulation of dust, snow) leads to reduced input power and MPPT tracking failure. Establish a regular cleaning mechanism (such as an automatic cleaning robot or manual inspection) and combine dust/snow sensors to monitor the state of the PV panels in real-time.

Some MPPT error messages are not clear (e.g., “overvoltage protection” may be caused by temperature fluctuations or configuration errors), making it difficult for users to troubleshoot. Optimize MPPT fault code grading prompts (such as APP push detailed troubleshooting steps) and integrate remote diagnostic modules to assist users in locating the source of the fault.

The inverter and battery voltage/charge-discharge curves are not compatible, leading to overcharging or undervoltage protection.

Choose an inverter that supports the battery type (such as lithium-ion/lead-acid), and control it in conjunction with the BMS.

When running in parallel, different phase synchronization or uneven power distribution can lead to system oscillation.

Use master-slave mode or integrated synchronous controllers to ensure communication and coordination among parallel equipment.