Huawei FusionSolar: Solar inverters, battery systems and plant management

Overview

FusionSolar is Huawei's solar and energy-storage offering, spanning home systems, commercial installations and utility-scale plants. Its catalogue includes SUN2000 inverters, LUNA2000 storage, module controllers, power sensors and plant communications equipment. The products form several system families rather than one fixed package.

For a home, the focus is coordinating generation, storage and consumption. At utility scale, the product range extends to array controllers, transformer stations and plant-management systems. That breadth makes FusionSolar relevant both to an installer selecting residential components and to an engineering team planning communications and operation across a much larger PV site.

Offering

The SUN2000 MAP0 series covers 5–12 kW residential energy controllers. Huawei describes three-phase unbalanced operation, battery integration and backup arrangements, with its product page identifying compatible storage and control components. The inverter's power rating and the surrounding backup equipment are separate parts of that selection.

The LUNA2000 S1 storage family uses modular battery arrangements and integrates with the FusionSolar app. The page describes time-of-use, maximum-self-consumption and feed-to-grid operating modes, along with views of production, consumption and battery charge or discharge. These functions help homeowners understand where energy is going and choose how the installed system should use its storage.

Technology

The SmartLogger3000B datasheet identifies three RS485 ports, Ethernet and optical Ethernet interfaces, plus digital and analogue I/O. The optional SmartModule1000A expands the ports and adds temperature-sensor inputs. Listed protocols include Modbus TCP and IEC 60870-5-104 over Ethernet, and Modbus RTU, IEC 60870-5-103 and DL/T645 on RS485.

The logger combines inverter collection with site signals: its digital and analogue inputs can bring external plant information into the same controller, while optical Ethernet offers another network connection option. The datasheet specifies device-count limits and optional expansion hardware. Logger firmware, data mapping and permitted access still define the actual connection.

Third-party access in practice

Independent integrators document both routes into a FusionSolar system. The meteocontrol VCOM integration uses the cloud Northbound API: the plant owner creates a separate API user in FusionSolar, data arrives as JSON over HTTPS at 5-minute resolution with a 15-minute pull, and Huawei caps requests per user, so meteocontrol recommends one API user per plant. For local access, the open-source evcc energy manager reads SUN2000 hybrid inverters over Modbus TCP or RS485 (unit ID 1, port 502 by default), after an installer account has enabled Modbus TCP. Grid and battery values need a Huawei power sensor, and evcc warns that a second client polling the same inverter can cause communication errors.

Security certifications

Huawei holds a Common Criteria EAL3+ certificate under the Spanish scheme for the SUN2000HA inverter communication-board software, evaluated by DEKRA and valid until September 2027. The evaluated software covers authentication, lockout after failed logins, audit logging and four user roles. TÜV Rheinland issued an ETSI EN 303 645 certificate in December 2023 for the SUN2000 LB0 and LC0 residential inverters. Both certificates are scoped to named models and software versions, and the FusionSolar site publishes no central security or vulnerability-disclosure page alongside them.

Customers

FusionSolar's best-documented reference is the Red Sea New City microgrid in Tabuk province, Saudi Arabia. Huawei Digital Power reported in September 2024 that the plant combines 400 MW of PV with 1.3 GWh of Huawei battery storage and 100 km of grid, runs without any connection to a national network, and had generated more than 1 TWh in its first year. Grid-forming control lets the storage hold voltage and frequency at night and on cloudy days.

The Digital Power company timeline adds a 2.2 GW plant in Gonghe County, Qinghai, connected in 2020. At the other end of the range, residential customers are installers and homeowners using SUN2000 inverters and LUNA2000 batteries through the FusionSolar app. Huawei publishes few named commercial or industrial customers in English, so most buyers judge the product by its utility references and the size of its installed base rather than by case studies in their own segment.

Markets

The Smart PV Plant Management System provides plant, sub-array, equipment and module views. It includes prioritised alerts, fault visualisation and diagnostic tools such as I-V curve analysis. Huawei also identifies RESTful API and IEC 104 interfaces for third-party access to plant operating and diagnostic information.

This is a different operational scale from the household energy-flow view in the LUNA2000 residential system. Plant operators need to locate underperforming equipment across many strings, while a homeowner is more likely to compare generation, battery use and grid exchange. The catalogue's separate residential, commercial and utility paths reflect those different operating tasks.

Market position and restrictions

Wood Mackenzie ranked Huawei first in global PV inverter shipments for 2024, with 176 GWac of a 589 GWac market; Huawei and Sungrow together held 55% and have held the top two places for ten years. Huawei led in China and Europe. It is largely absent from the United States: pv magazine reported in June 2019 that it had stopped US inverter sales.

In Europe, access is narrowing. Lithuania passed a law in November 2024 barring Chinese companies from remote access to solar, wind and storage installations above 100 kW from May 2025. SolarPower Europe opened exclusion proceedings against Huawei in May 2025 during an EU bribery investigation, then suspended them in October 2025 after Huawei agreed to stay out of its workstreams; Huawei denies wrongdoing. In May 2026 the European Commission confirmed it is blocking EU funding for projects using inverters from high-risk vendors, naming Huawei, with new contracts fully restricted from April 2027 according to Euronews. Projects relying on EU, European Investment Bank or EBRD finance now face supplier restrictions that privately financed sites do not.

Company

Huawei Digital Power presents FusionSolar alongside its data-centre, telecom-site, charging and other power-electronics businesses. Its corporate timeline records the establishment of Huawei Digital Power Technologies in June 2021 and also documents earlier Huawei solar-product milestones. FusionSolar is a business and product offering within Huawei. The founding year shown here is Huawei’s corporate origin in 1987, not the start of FusionSolar. Huawei Digital Power’s separate establishment in June 2021 is documented in its sustainability report.

The Digital Power privacy policy identifies Huawei Digital Power Technologies Co., Ltd. and gives its registered address in Shenzhen. The wider business combines power electronics with digital management systems. That context explains why the solar catalogue includes both conversion hardware and software for commissioning, monitoring and operating energy assets.