When reading product documentation, we often come across descriptions such as “this inverter supports n MPPT inputs.” But what exactly does MPPT mean?
What is MPPT?
MPPT stands for Maximum Power Point Tracking, one of the core technologies used in photovoltaic (PV) systems (such as solar power generation systems) to improve energy conversion efficiency.
The output characteristics of a solar PV array are nonlinear and are affected by solar irradiance, ambient temperature, and load. Only at a certain output voltage can the array deliver its maximum power output. This point, located at the peak of the power–voltage curve, is called the Maximum Power Point (MPP). Tracking this maximum power point is essential for making full use of solar energy.
MPPT efficiency
MPPT efficiency refers to the ratio between the actual maximum power tracked by the MPPT controller and the theoretical maximum power available. It measures how well the controller can follow the optimal power point. The higher the efficiency, the more effectively the PV modules’ generation capacity is utilized.
High-quality MPPT controllers on the market generally achieve efficiencies of 98% or above. Hinen’s MPPT solutions can reach up to 99.9% efficiency.
What does MPPT do?
· Improve PV system efficiency. Compared with systems without MPPT, energy generation can increase by 10–30%, especially when sunlight is unstable or temperature varies greatly.
· Smart load matching MPPT automatically adjusts the PV array’s output voltage and current to match the state of the load or battery bank, ensuring efficient charging and power supply.
· Optimize performance under diverse lighting conditions. In shaded or multi-orientation setups (e.g., panels facing different directions), multiple MPPT inputs can track each string’s optimal power point separately, boosting overall system output.
· Enhance system reliability and flexibility. A multi-MPPT design (e.g., 4 independent MPPTs) allows connection of PV modules with different orientations or specifications without interference, resulting in a more flexible and efficient system.
What does the number of MPPTs in an inverter represent?
The number of MPPTs in an inverter directly reflects its ability to manage PV input precisely. This influences system efficiency, design flexibility, and shading tolerance.
Each MPPT enables independent tracking of one PV array’s maximum power point.
Benefits of multiple MPPTs include:
· Higher energy yield: Each string operates independently, minimizing mismatch or shading losses.
· Greater installation flexibility: Suitable for multiple orientations, tilt angles, or roof sections.
· Better compatibility: Supports different types, ratings, or capacities of PV modules (with voltage/current matching).
· Reduced impact of faults: Issues in one string do not affect the others.
How to choose the right MPPT configuration for your home?
|
User Type |
Roof Condition |
Recommended MPPTs |
|
Unshaded, single-slope roof |
Simple structure |
1 |
|
East–west or dual-slope roof |
Dual roof system |
≥ 2 |
|
Multi-angle or partially shaded roof |
Complex distribution |
≥ 3 |
Hinen’s Multi-MPPT Inverter Solutions
Hinen A Series 15kW/25kW all-in-one systems and the E Series balcony systems feature 4 independent MPPT circuits. The 12kW single-phase low-voltage inverter integrates 3 MPPT circuits.
These high-performance, flexible designs are ideal for complex rooftops with multiple orientations, partial shading, or the need to connect PV modules of varying specifications. By independently optimizing each string’s generation performance, they significantly reduce efficiency losses caused by environmental factors and maximize overall system yield.
For more product information, please contact us.
