Huawei SUN2000-506KTL-H1 1500 V Smart String Inverter

Overview

The Huawei SUN2000-506KTL-H1 is a utility-scale smart string inverter from Huawei Digital Power, built for 1500 V photovoltaic plants. A single Huawei SUN2000-506KTL-H1 handles up to 506,000 VA of maximum apparent power with a nominal active power of 460,000 W, which places a large-capacity string inverter where many older plant designs would have used a central inverter station. Huawei publishes the H1 and H3 variants on one datasheet, quoting a maximum efficiency of 99.1 % and a European efficiency of 98.8 %, six MPP trackers and a 1000 V three-wire AC output.

Seven Star LLC supplies the Huawei SUN2000-506KTL-H1 to EPC contractors, independent power producers and industrial owners in Oman and across the GCC, with engineering support in Muscat. Utility-scale and large captive solar projects in the Sultanate, from desert sites in Al Dhahirah and Al Wusta to industrial self-generation in Sohar and Duqm, need high-power string inverters that tolerate heat, dust and long periods of high irradiance, and our team helps buyers align inverter quantities, transformers and SCADA with the project design.

Operating Principle of the Huawei SUN2000-506KTL-H1

As a general explanation, a string inverter in a 1500 V plant receives DC from long series strings of PV modules, tracks the maximum power point of each input group and converts the energy to three-phase AC that is then stepped up by a medium-voltage transformer. Spreading conversion over many string inverters instead of a few central units limits the energy lost when one unit is out of service and allows finer tracking of mismatched array sections. The Huawei SUN2000-506KTL-H1 applies this approach at a very high power rating: six MPPTs with up to six PV inputs each, a maximum current of 105 A per MPPT and a maximum short-circuit current of 180 A per MPPT.

The DC input of the Huawei SUN2000-506KTL-H1 accepts a maximum of 1500 V, with an MPPT operating range of 500 V to 1500 V and a nominal input voltage of 1200 V; Huawei notes that the DC-side withstand voltage can reach 1600 V. On the AC side the nominal output is 1000 V, 3W + PE, at 50 Hz or 60 Hz, with a nominal output current of 265.6 A, a maximum output current of 292.2 A, power factor adjustable from 0.8 lagging to 0.8 leading and THDi below 1 % at rated power. Huawei lists grid-forming as a supported function, which is increasingly relevant for weak grids and hybrid PV-plus-storage plants.

Engineering Design of the Huawei SUN2000-506KTL-H1

Mechanically, the Huawei SUN2000-506KTL-H1 measures 1065 mm by 800 mm by 400 mm and weighs 130 kg including the mounting plate. The enclosure is rated IP66, anti-corrosion protection is C5-Medium, and the unit operates from −25 °C to 60 °C at relative humidity from 0 to 100 % non-condensing. It operates at altitudes up to 5000 m, with derating above 4000 m according to the datasheet. Cooling is smart air cooling with a smart hybrid cooling system, a self-cleaning fan and an intelligent anti-icing function, and typical noise level is stated as 75 dB. The topology is transformerless.

Protection functions on the Huawei SUN2000-506KTL-H1 include Smart String-level Disconnection (SSLD), Smart Connector-level Detection (SCLD), AC overcurrent protection, DC reverse-polarity protection, PV-array string fault detection, type II AC and DC surge arresters, DC insulation resistance detection and a residual current detection unit. Smart IV curve diagnosis is supported for remote analysis of string health. Communication uses MBUS power-line communication over the AC cables, while RS485 is not provided on this model; the display consists of LED indicators. DC connectors are HH4SFD4TMS / HH4SMD4TMS types and the AC side supports OT or DT cable lugs. Compliance is listed with IEC 62109-1/-2, IEC 62920, IEC 60947-2, EN 50549-2 and IEC 61683, among others.

Key Features

The main features of the Huawei SUN2000-506KTL-H1 highlighted by Huawei are listed below.

• A maximum efficiency of 99.1 % and a European efficiency of 98.8 % reduce conversion losses across the plant life.
• Six MPP trackers with up to six inputs each and 105 A per tracker suit high-current bifacial modules on 1500 V strings.
• Smart String-level Disconnection and Smart Connector-level Detection improve safety on the DC side.
• Smart IV curve diagnosis lets operators analyse string performance remotely instead of testing on site.
• The smart self-cleaning fan and hybrid cooling are designed for dusty and hot environments.
• Grid-forming capability is supported for plants connected to weak grids or combined with energy storage.
• IP66 protection and C5-Medium anti-corrosion rating suit outdoor desert and coastal installations.
• MBUS communication over AC power cables reduces separate communication cabling in large plants.

Industrial Applications

The Huawei SUN2000-506KTL-H1 is aimed at ground-mounted utility plants and large captive PV systems. In Oman, that includes independent power projects, solar fields that feed mining and cement operations, oil and gas field electrification in the interior, and large industrial self-consumption plants in the Sohar, Duqm and Salalah free zones. With its 1000 V AC output, the inverter connects directly to the low-voltage winding of a dedicated step-up transformer, which suits block designs where several inverters feed one medium-voltage skid.

The anti-dust cooling, C5-Medium corrosion class and 60 °C operating limit are important in the interior of Oman, where sand, high ambient temperature and strong sunlight all stress equipment. Seven Star LLC supplies the Huawei SUN2000-506KTL-H1 and associated Huawei SmartLogger and plant components for such projects, and supports engineers in Oman and the GCC with documentation and coordination of delivery schedules.

Technical Specifications

The data below for the Huawei SUN2000-506KTL-H1 is taken from the Huawei SUN2000-506KTL-H1/H3 datasheet.

Related Products

For plant auxiliaries and backup power, engineers also specify the EnerSys PowerSafe DU battery for substation DC systems, the EnerSys PowerSafe OPzV 2V gel battery for long-life standby and the Schneider Electric Conext SW inverter for smaller hybrid systems.

How to Order

For a quotation on the Huawei SUN2000-506KTL-H1, send Seven Star LLC your plant capacity, DC/AC ratio, transformer block arrangement and delivery schedule. The Huawei datasheet is available for download on this page, and our engineers in Muscat can coordinate inverter quantities, SmartLogger units and spare parts. Seven Star LLC supplies Huawei equipment with engineering support across Oman and the GCC.