Recently, SGS, an internationally recognized testing, inspection, and certification organization, granted Yunt Digital Power Co., Ltd. (hereinafter referred to as “Yunt Digital Power”) a series of Spanish grid-connection certifications, including UNE 217001:2020-10, UNE 217002:2020, and NTS V2.1 Type A, B, C & D, for its energy storage grid-connected inverters. The certification ceremony was attended by Zhou Quan, Deputy Director of SGS Renewable & Advanced Energy China, Yi Xiaoguang, General Manager of Yunt Digital Power, and other key representatives from both parties.
Europe is a critical market for the renewable energy industry, with a well-established photovoltaic sector, rapid growth, large market capacity, and stringent industry standards. NTS V2.1, the latest grid code jointly issued by Spain’s REE and AELEC, imposes rigorous requirements on generator grid connections, including frequency and voltage control, fault ride-through capabilities, and testing procedures for inverters and auxiliary components (CAMGE) such as factory control systems. It is one of the most challenging grid codes globally, emphasizing the certification and validation of equipment functionality and quality for grid integration.
Under this standard, Spanish power stations are categorized into four types (A, B, C, D) based on grid voltage and capacity. Category D power stations require a grid-connected voltage of ≥110KV and a capacity exceeding 50MW. Testing for Category D covers high/low voltage ride-through, frequency ride-through, and under-frequency power boost. Inverters passing these tests are deemed suitable for all application scenarios. Additionally, the standard mandates that inverters must operate reliably in harsh environments such as saline-alkali areas, metal-dust zones, and extreme temperatures (both high and low). This ensures compatibility with both tropical and cold climates.
As a leading inverter supplier, Yunt Digital Power prioritizes technological innovation. During this collaboration, SGS rigorously tested Yunt Digital Power’s Mars-100～125KT full-series photovoltaic grid-connected inverters and validated their simulation models against laboratory data. Both the hardware and models successfully met the stringent NTS V2.1 requirements, earning Type A, B, C & D certifications. This achievement underscores the product’s compliance with globally leading safety and quality standards, bolstering trust among manufacturers, suppliers, retailers, and regulators while accelerating Yunt Digital Power’s expansion into the Spanish market.
Moving forward, SGS will continue partnering with Yunt Digital Power to deepen collaboration in renewable energy product testing, quality system evaluation, energy efficiency, emission reduction, and low-carbon initiatives, jointly advancing global renewable energy development.
About Yunt Digital Power
Shenzhen Yunt Digital Power Co., Ltd. leverages power electronics and energy storage conversion technologies to deliver efficient and secure products and solutions for high-end commercial and industrial energy storage. Its offerings include full-scenario commercial/industrial energy storage PCS modules, DCDC/MPPT modules, STS modules, and residential energy storage inverters. Guided by a “customer-centric” philosophy, the company combines technical expertise and premium services to meet diverse global needs.
About SGS
SGS is a globally recognized testing, inspection, and certification organization. With 99,500 professionals across 2,500+ offices and laboratories in 115 countries, SGS delivers unparalleled quality, safety, and compliance solutions. Over its 145-year history, the Swiss-rooted company has built expertise across five strategic sectors: Connectivity & Products, Industries & Environment, Nutrition & Health, Natural Resources, and Governance & Assurance.
