Since 2026, major economies have been raising compliance standards for PV energy storage equipment. The European Union has implemented a new version of certification standards, and North America has updated the UL 1741-SA grid-connection specifications. For battery controllers — a core system component — UL and TÜV certifications have shifted from a “nice-to-have” to a “must-have” for accessing the US and EU markets, and also a mandatory access requirement for mainstream cross-border platforms such as Amazon and TEMU.
UL certification mainly targets the North American market (the United States and Canada), and its core standard, UL 1741, is a mandatory safety and grid-connection guideline for distributed energy system equipment (including controllers). On April 24, 2026, this standard completed its latest update, covering the full-scenario adaptation needs of photovoltaic energy storage charge controllers.
Obtaining UL certification means the product meets North American requirements for electrical safety, grid-connection safety, and environmental adaptability. For example, it can withstand 3000V AC for 1 minute without breakdown, the ground continuity resistance is ≤0.1Ω, and it is equipped with complete arc fault protection; in terms of grid connection, it achieves anti-islanding protection and rapid response to voltage/frequency abnormalities, complying with the IEEE 1547 standard; in terms of environmental and mechanical adaptability, it reaches the IP/NEMA protection level, the heat dissipation and flame retardancy meet the UL 94 V-0 standard, and can operate reliably under extreme conditions, including high/low temperatures and vibrations.
TÜV certification focuses on the European market and strictly complies with the updated PV energy storage certification requirements published by TÜV Rheinland on April 2, 2026. Obtaining TÜV certification means that the product has passed rigorous quality and safety tests, covering all requirements after the upgrade of certification dimensions, and is a core compliance certificate for entering the European market.
The acquisition of UL and TÜV dual certifications means that domestic battery controllers can be simultaneously adapted to the two major mainstream markets of North America and Europe without additional local modifications, greatly reducing the compliance costs and time costs of cross-border exports, and effectively avoiding the risks of product rework and recall. At present, many domestic photovoltaic controller enterprises have stood out in the global market by virtue of the advantages of dual certifications:
• SRNE SOLAR CO., LTD. : Its photovoltaic controller products have obtained UL and TÜV dual certifications, and has obtained TÜV NORD witness laboratory accreditation, enabling it to independently complete part of the certification tests and greatly shorten the certification cycle. The products are exported to more than 150 countries, covering the full scenarios of photovoltaic energy storage.
• Beijing Epsolar Technology Co., LTD.（EPEVER）: Its MPPT conversion efficiency reaches 99.2%, and it has obtained more than 300 international certifications, including the UL 1741 and TÜV-related standards. The products are exported to more than 80 countries, with offices established in core European and American markets, and with over 100,000 installations in RVs and residential PV systems.
• Muster (MUST)： As a national-level "Specialized and Sophisticated Little Giant" enterprise, Muster's product line covers MPPT solar controllers, inverters, and energy storage systems. The company holds UL, CE, SGS and other international certifications, exports to over 100 countries and regions worldwide, and has established overseas subsidiaries in Poland and Panama — making it one of the representative Chinese exporters of solar controllers.
According to the interpretation of the global photovoltaic energy storage product certification system updated in April 2026, the market value of UL and TÜV dual certifications continues to be prominent—it is not only the core threshold for cross-border access, but also a direct reflection of the enterprise's technical strength. For cross-border photovoltaic operation enterprises, choosing domestic battery controllers with dual certifications can not only reduce compliance risks, but also obtain higher cost performance and localized service support by virtue of the advantages of the domestic supply chain.
It is worth mentioning that the UL certification process has been further standardized in 2026: enterprises need to submit documents such as specifications and circuit diagrams, send 2-3 mass-produced prototypes for testing, the regular processing cycle is 4-8 weeks, and the cost is determined according to the product power. At the same time, UL now offers an online verification portal, allowing customers to verify the authenticity of the certification at any time, providing convenience for the compliance inspection of cross-border photovoltaic products.
The widespread adoption of UL and TÜV dual certifications by domestic battery controllers is an important milestone in the technological upgrading and improvement of independent controllability of China's photovoltaic energy storage industry. With the continuous advancement of global green energy policies, relying on the advantages of dual certifications, domestic core photovoltaic components are expected to further increase their global market share, promoting China's photovoltaic industry to enter a new stage of high-quality development in overseas markets.
