Function

The SUN2000 is a three-phase grid-tied PV string inverter that converts the DC power generated by PV strings into AC power and feeds the power to the power grid.

Features

Intelligent

• 6 independent maximum power point tracking (MPPT) circuits and 12 PV string inputs: Support the flexible configuration of 2+2+2+2+2+2 strings.
• 12 routes of high-precision smart PV string monitoring: Help identify and rectify exceptions in a timely manner.
• MBUS networking: Uses the existing power line for communication and does not require an additional communications cable, which reduces the construction and maintenance costs and improving communication reliability and efficiency.
• Smart I-V curve diagnosis: Implements I-V scanning and health diagnosis for PV strings. In this way, potential risks and faults can be detected in time, improving the plant O&M quality.

Efficient

• Peak efficiency: 99%
• CEC efficiency: 98.5%

Safe

• Arc fault protection (AFCI: arc fault circuit interrupter): UL 1699B Type I
• Embedded DC and AC SPDs: all-dimensional surge protection
• Embedded residual current monitoring unit: Immediately disconnects from the power grid upon detecting that the residual current exceeds the threshold.

Reliable

• Natural cooling
• No-fuse design
• Protected to Type 4X
• Effective design for ground subsidence: The AC terminal block can be pulled down by up to 50 mm (1.97 in.) due to cable overstress.

Networking Application

The SUN2000 applies to distributed grid-tied commercial PV systems and large-scale grid-tied PV plants. Typically, a grid-tied PV system consists of the PV string, SUN2000, AC combiner box, and step-up transformer.

Figure 2-4 Networking application

(A) PV string	(B) SUN2000	(C) AC combiner box
(D) Step-up transformer	(E) Power grid

Supported Power Grid Earthing Systems

The following figure shows the power grid earthing systems supported by the SUN2000.

Figure 2-5 Supported power grid

The SUN2000 supports the IT earthing system in PV-only scenario. The use of the SUN2000 in other types of earthing systems, such as TT, TN-C, and TN-C-S, is not recommended. (If such an earthing system is encountered, contact the Company's engineers.)