PV Test Equipment
LED Sun Simulator


Manufacturers will use solar simulators to measure the efficiency of solar cells on production lines, as well as in laboratory. Nowadays, all sun simulators are designed with xenon or halogen lamps which increase costs due to the high power consumption and depreciation rate. King Design Industrial CO., LTD (KDI) and Industrial Technology Research Institute of Taiwan, R.O.C (ITRI) co-developed the solar simulator based on Light Emitting Diode (LED), which takes another step forward, conforming to IEC 60904-9. With its state-of-the-art technology, there are two features that you will notice straightaway from this innovative product.

AAA+ Class

KDI LED simulator (KD-SS01-1616) could provide up to 36 in2 illumination area adhere to meeting the AAA requirements in three categories based on the criteria of spectral distribution match, non-uniformity of illumination area, and temporal stability.We will provide the 64 in2 system during the next phase in the future.

Spectral Distribution Match

The reference spectral distribution of sunlight at Air Mass 1.5 Global is laid down in IEC 60904-3. Spectral match of a solar simulator is defined by the deviation from 400-1100nm reference spectral irradiance into six spectral ranges. For Class A of solar simulator, the ratio of percentage distribution of intervals is from 0.75 to 1.25, as specified in Figure 1.

Wavelength Relative Energy Distribution Coincidence Class
IEC 60904-9 KD-SS01-1616
400-500nm 18.40% 18.41% 1.00 A+
500-600nm 19.90% 20.43% 1.03 A+
600-700nm 18.40% 18.74% 1.02 A+
700-800nm 14.90% 15.48% 1.04 A+
800-900nm 12.50% 12.85% 1.03 A+
900-1100nm 15.90% 14.09% 0.89 A+
Fig.1: Spectral match of KD-SS01-1616, Class A requires 0.75-1.25 Non-uniformity of Illumination Area The spatial non-uniformity of illumination area is one of the most difficult characteristic to achieve. KD-SS01-1616 was set in the optical compartment, which ensures uniformity variations of less than 1%.

Fig.2: The 36 in2 illumination area, Class A requires non-uniformity less than 2%; KD-SS01-1616 uniformity variations are less than 1%.

Temporal Stability

Electronic control assures that the lamp fluctuation does not exceed 0.2% during the solar cell measurement to meet the IEC 60904-9 A class requirement.

Fig.3: KD-SS01-1616 output variation over the time period of 300 seconds, our system stability can reach 99.8%, excluding lamp fluctuations to distort the solar cell measurement.

Compact, and Long Life-Time

The KD-SS01-1616 system, included LED light source, power supply, and optical compartment, are housed in a 320x580x520mm3 box. Its compact design is easy to operate, and install, which can be used in lab-testing, as well as, particularly, be mounted on an automation production line for inspection and measurement of a solar cell. The KD-SS01-1616 can illuminate steadily for more than 20000 hours surpassing other lamp systems of the simulator on the market, whilst only consuming 1/3 of the electrical power. “Users will see the benefit, significantly reducing R&D, Quality Assurance and Production costs, once they decide to choose LED simulator.” says KDI


System Specifications
Lamp Type Light-Emitting Diode (LED)
Illumination Area 160mm x 160mm
Output Type Steady State
Lifetime 20000 Hrs
Lamp Power 300W
Irradiance 200-1100W/m2
Spectral Distribution Match IEC 60904-9, A Class
Non-uniformity of Illumination < 1%
Temporal Stability LTI < 1%;
STI < 0.5%;
Input Power 90~240VAC/5A, 50/60 Hz
Cooling System Air Ventilation
Optional Accessories 1. IV Tracer 
2. Stage :  a. Stand Alone
   b. Inline

Light Source Unit: