Technical Analysis: Comparison of SUN-5K-SG04LP1-EU-SM2 and SUN-5K-SG05LP1-EU Solar Inverters

This technical analysis compares two solar inverter models, the SUN-5K-SG04LP1-EU-SM2 and the SUN-5K-SG05LP1-EU, focusing on their design, performance, and compatibility with different solar module types. The analysis is based on visual and tabular data provided.

1. Design and Appearance

SUN-5K-SG04LP1-EU-SM2

 ●  Minimalist Design : This model features a clean, minimalist design without front-panel screws, contributing to a sleek appearance.

 ●  Junction Box Access : The junction box opens via a latch mechanism, facilitating easier wiring.

 ●  Cooling System : It does not include an external cooling fan, which helps maintain lower operating noise levels.

SUN-5K-SG05LP1-EU

 ●  Industrial-Style Design : This model has a more robust, industrial-style design with screws securing the front panel.

 ●  Junction Box Access : Opening the junction box requires unscrewing the front panel, which may be slightly less convenient for wiring.

 ●  Cooling System : Equipped with an external cooling fan, this model offers better environmental adaptability, making it suitable for harsher conditions.

2. Performance Specifications

Maximum PV Input Current

 ●  SUN-5K-SG04LP1-EU-SM2 : Supports a maximum PV input current of 18 + 18 A (single MPPT current limit is high), making it compatible with high-power 650 W modules (210-cell).

 ●  SUN-5K-SG05LP1-EU : Supports a maximum PV input current of 13 + 13 A (single MPPT current limit is low), best suited for ≤500 W modules (182-cell).

PV String Inputs

 ●  Both models support consistent PV string inputs of 2 / 1+1.

3. Internal Structure and PCB

Internal Hardware Layout

 ●  SUN-5K-SG04LP1-EU-SM2 : Features an additional set of function ports, including a dedicated Modbus RTU port, and a different PE grounding scheme.

 ●  SUN-5K-SG05LP1-EU : Has a significantly different internal hardware layout and functional interfaces compared to the SM2 model.

PCB Design

 ●  Both models use different PCB designs, indicating substantial internal upgrades and optimizations.

4. Size and Weight

 ●  SUN-5K-SG04LP1-EU-SM2 : Dimensions are 376 × 470 × 241.5 mm, weighing 19 kg. This model is smaller and lighter.

 ●  SUN-5K-SG05LP1-EU : Dimensions are 330 × 580 × 232 mm, weighing 25 kg. This model is larger and heavier.

5. Compatibility and Environmental Adaptability

 ●  SUN-5K-SG04LP1-EU-SM2 : Offers better compatibility with high-power solar modules (≥650 W) due to its higher maximum PV input current.

 ●  SUN-5K-SG05LP1-EU : Is more suitable for low-power solar modules (≤500 W) and provides better environmental adaptability through its external cooling fan.

6. Conclusion

The SUN-5K-SG04LP1-EU-SM2 and SUN-5K-SG05LP1-EU solar inverters cater to different needs based on their design, performance, and compatibility:

SUN-5K-SG04LP1-EU-SM2 :

 ●  Strengths : Minimalist design, quieter operation, higher maximum PV input current, and better compatibility with high-power modules.

 ●  Ideal Use Case : Suitable for installations requiring high-power solar modules and a sleek, quiet inverter.

SUN-5K-SG05LP1-EU :

 ●  Strengths : Industrial-style design, external cooling fan for better environmental adaptability, and robust construction.

 ●  Ideal Use Case : Ideal for installations using low-power solar modules and operating in harsh environments where durability and cooling are critical.

Both models offer optimized layouts and upgraded PCB solutions, ensuring reliable performance. However, the choice between them should be based on the specific requirements of the solar installation, such as module type, environmental conditions, and aesthetic preferences.

For further inquiries or detailed specifications, please visit www.unizsolar.com or contact [email protected] .