Comparison Between SUN-12K-SG04LP3-EU and SUN-12K-SG05LP3-EU-SM2: Key Differences and Improvements

1. Design and Appearance

SUN-12K-SG04LP3-EU: This model features an industrial design, with screws on the front panel, requiring the removal of screws to access the wiring area. The unit also includes built-in carry handles for easier transportation.

SUN-12K-SG05LP3-EU-SM2: A more minimalist design, this model has no screws on the front panel. Instead, it uses a latch-type junction box for easier access to wiring, which improves the user experience by making it quicker to access and manage wiring. Additionally, the carry handles are replaced by cut-outs in the heatsink, contributing to a cleaner overall look.

2. Electrical Specifications
Max. PV Input Current:

SUN-12K-SG04LP3-EU: 26A + 13A

SUN-12K-SG05LP3-EU-SM2: 26A + 26A (better compatibility with high-power modules)

PV String Inputs:

SUN-12K-SG04LP3-EU: 2/2+1 inputs

SUN-12K-SG05LP3-EU-SM2: 2/2+2 inputs, offering more flexibility for wiring, which is ideal for setups with multiple strings of solar panels.

3. Internal Structure and PCB
SUN-12K-SG04LP3-EU: This version has a baseline internal layout with standard port distribution. The PCB is the original version.

SUN-12K-SG05LP3-EU-SM2: This newer model has optimized internal structure with a terminal block design. The PCB has been completely upgraded, except for the Wi-Fi board, which is shared between both models.

4. Size and Weight
SUN-12K-SG04LP3-EU: Size is 422x658x254 mm and weighs 38 kg.

SUN-12K-SG05LP3-EU-SM2: Size is 386x660x250 mm (excluding connectors and brackets) and weighs 35.2 kg, making this version smaller and lighter compared to the older model.

5. Port Layout

SUN-12K-SG04LP3-EU: The wiring terminal structure has a traditional setup, with the functional and communication interfaces in standard positions.

SUN-12K-SG05LP3-EU-SM2: The port layout has been optimized, with the functional interfaces and communication ports repositioned for better access and easier integration with other systems.

6. PCB Upgrades

SUN-12K-SG04LP3-EU: The PCB is the original design and not as updated as the newer version.

SUN-12K-SG05LP3-EU-SM2: A completely upgraded PCB solution is used in this model, which improves efficiency and performance. The only shared component between the two models is the Wi-Fi board.

Summary:
The SUN-12K-SG05LP3-EU-SM2 offers several improvements over the SUN-12K-SG04LP3-EU. The newer model features better compatibility with high-power modules, an optimized port layout, and a lighter design. Furthermore, the upgraded PCB and minimalist design with easier wiring make it more user-friendly and efficient for modern installations. It is the preferred choice for customers seeking a more compact, versatile, and high-performance solar inverter.