Maximum Energy Efficiency in Commercial Systems

Maximum Energy Efficiency in Commercial Systems

Since modules in a string have different maximum power points (MPPs) in commercial systems, there will inevitably be module level incompatibility. The incompatibility occurring due to different reasons reduces the energy efficiency of the entire string.

CONVENTIONAL INVERTER

•    MPPT per string – all modules work at the same current whatever their own MPPs are.
•    Weak modules reduce the performances of all modules in the string, or are bypassed.
•    Power losses due to module mismatch.

DC OPTIMIZED INVERTER SOLUTION

•    MPPT per module – current and voltage adjusted per module 
•    Maximum power generated and tracked from each module individually.
•    Between 2% and 10% more energy compared to FV systems 

SolarEdge DC optimized inverter solution reduces power losses occurring due to module mismatch, and ensures maximum power generation from each module. With SolarEdge, strong modules are not affected by weak modules.

Soiling, Shading and Leaves 

Module soiling due to dirt, bird droppings or snow causes mismatch between modules and strings.
Even if there is no obstacle throughout the land installation, a tree that grows during the lifetime of the system, or an erected building may cause uneven shading.

•    MPPT per string – all modules work at the same current whatever their own MPPs are.
•    Weak modules reduce the performances of all modules in the string, or they are bypassed.
•    Power losses due to module mismatch. 
•    MPPT per module – current and voltage adjusted per module. 
•    Maximum power generated and tracked from each module individually.
•    Between 2% and 10% more energy compared to FV systems

SolarEdge DC optimized inverter solution reduces power losses occurring due to module mismatch, and ensures maximum power generation from each module. With SolarEdge, strong modules are not affected by weak modules.

Examples for Power Mismatch in Commercial Systems 

Manufacturing Tolerance Mismatch 
Output power warranted by module manufacturer may vary greatly. A deviation of 3% is sufficient for an energy loss of ~2%.