I. Intensive Code and Standard Updates: 2024 is a “Big Year” for PV Grounding Standards

In 2024, China’s PV grounding‑related standards underwent intensive updates, with several important national and industry standards issued or taking effect.

GB/T 29319‑2024, Technical Requirements for Connecting Photovoltaic Power Generation Systems to the Distribution Network, was officially released and took effect on March 15, 2024, superseding the 2012 version. Group standard T/CERS 0024‑2024, Code for Construction Safety of Distributed Photovoltaic Projects, also came into force on March 31, 2024, setting more detailed requirements for grounding safety during distributed PV construction. The 2024 edition of GB 50797‑2012, Code for Design of Photovoltaic Power Stations, was updated concurrently, explicitly specifying grounding resistance requirements for PV arrays – continuous, reliable grounding with a grounding resistance of less than 4Ω. The standard also mandates grounding connections between module metal frames and metal supports, stating that “reliable grounding connection measures must be provided between the module metal frame and the metal support.”

At the international level, the UL 4703 PV wire standard continued to attract industry attention in 2024. This standard covers single‑conductor insulated cables for use in PV system interconnections, with temperature ratings from 90°C to 150°C, providing key technical references for the material selection of PV grounding bonding jumpers. Within the NEC 2023 framework, the requirements for equipment grounding jumper connections and continuity are further emphasized in PV system grounding design. The latest NEC PV system grounding diagrams (2023–2025 update) clearly state: all exposed metal parts of module frames, mounting structures, enclosures, and other equipment must be grounded, and bonding jumpers must ensure electrical continuity among the various components.

Furthermore, the International Electrotechnical Commission (IEC) continued in 2024 to advance the update process for standard IEC 60364‑7‑712 (special requirements for photovoltaic power supply installations). The fully updated version of this standard, which comprehensively upgrades the electrical installation safety requirements for PV systems, was officially published in October 2025, providing the latest design basis for PV grounding bonding jumper products worldwide.

II. Market Drivers: PV Installation Growth and Safety Incidents Drive Grounding Technology Upgrades

According to a recent report by market research firm DataIntel, the global market for racking system grounding and bonding reached USD 3.2 billion in 2024 and is expected to grow to USD 6.1 billion by 2033, at a CAGR of 6.8%. The report notes that this growth is driven primarily by the accelerated global deployment of solar PV systems; demand for bonding jumpers, ground rods, and ground clips has surged for utility‑scale plants and commercial & industrial (C&I) rooftop projects.

At the same time, frequent PV electrical safety incidents at home and abroad in 2024 have further emphasized the importance of high‑quality grounding bonding products. Domestically, in July 2024, a rooftop PV system at a metal products factory warehouse in Shenzhou City caught fire, causing direct property losses of approximately RMB 20,000 and burning about 100 m². The fire investigation pointed to an electrical fault. In April 2024, a rooftop PV project in Wenzhou, Zhejiang Province, suddenly caught fire, and the spreading flames engulfed a large number of PV modules. Internationally, the UK experienced 97 residential fires involving PV modules in 2024, followed by 27 fires in commercial properties, 17 at ground‑mount plants, and 10 at industrial facilities – most attributed to poor installation quality.

These safety incidents have prompted local regulators to continuously strengthen safety inspections of PV plants. In 2024, local governments such as Jiangdu District carried out comprehensive hazard inspections of distributed PV power stations, with a key focus on checking the integrity of grounding systems.

III. Product Technology Innovation: Tool‑Free Bonding Jumpers Become a 2024 Industry Highlight

On the technology front, two notable trends emerged in the global PV grounding bonding jumper market in 2024: first, tool‑free, quick‑install products became the mainstream direction; second, product UL certification became an important indicator of market access.

At the Intersolar North America exhibition in January 2024, DynoRaxx’s DynoBond bonding jumper product attracted widespread industry attention. The product has obtained UL 467 and UL 2703 certification. Constructed with tinned copper wire and stainless steel clips, it can be clamped directly onto the PV module frame to achieve inter‑module and inter‑row bonding – all without any tools. Compared with traditional methods of installing ground clips one by one and using 6 AWG copper wire for connections, DynoBond greatly reduces installation time and labor costs and eliminates reliance on copper wire. The product fits module frame thicknesses from 1.2 mm to 3.1 mm and can be installed universally on both flat and pitched roofs. With its corrosion‑resistant design and low‑resistance grounding path, it was widely adopted in residential and C&I projects in 2024.

Another product that attracted market attention was the Top Rack bonding jumper. It also emphasizes tool‑free installation – reliable inter‑row grounding that meets code‑required electrical continuity can be achieved by hand without any tools, making it suitable for various rooftop PV installation projects. Pegasus Solar also launched its North‑South Bonding Jumper, which also has UL 2703 certification and provides fast, reliable inter‑row grounding connections without copper wire.

In addition, in June 2024, the United States Patent and Trademark Office issued an important patent to SOLAR FOUNDATIONS USA for an “integrated bonding mid‑clamp device, system, and method” for the installation and grounding of solar modules. The granting of this patent marks continued innovation in the structural integration and ease of installation of PV grounding bonding technology.

On the domestic Chinese market side, companies such as Xiamen Disheng Industrial & Trading Co., Ltd., HQ Mount, and Chiko Solar also continued to launch PV lightning protection grounding accessories, bonding clips, and grounding terminal products in 2024, covering solutions such as copper braided wire and stainless steel ground clips. Among these, copper bonding jumpers are widely adopted in large PV plants due to their high conductivity and corrosion resistance, becoming a reliable grounding choice at rail connections of PV racking systems.

IV. Industry Trends and Outlook: A New Round of Standard Upgrades Begins in 2025

Looking ahead to 2025, the PV grounding bonding jumper market will face even stricter code and standard requirements. GB 50797‑2025, Code for Safety of Photovoltaic Power Stations, will be fully implemented in 2025, with new clear requirements for grounding cable cross‑sectional area – the ground wire from the module combiner box to the inverter shall be no less than 2.5 mm² copper cable, and the racking ground shall use no less than 4 mm² copper cable. It also requires that the total ground resistance of the grounding system not exceed 4Ω in areas where soil resistivity is ≤500 Ω·m. GB 50169‑2025, Code for Construction and Acceptance of Grounding Device for Electrical Equipment Installation, will also become effective on January 1, 2026, further unifying and standardizing grounding construction requirements for various electrical installations. In addition, the new version of IEC 60364‑7‑712 was officially released in October 2025, comprehensively upgrading the electrical installation safety requirements for PV systems.

From a market perspective, as PV module power continues to increase and plant sizes grow, efficient, reliable, and compliant grounding bonding products will become industry necessities. UL and TÜV certifications are becoming “gateway” credentials for entering mainstream markets. New‑type bonding jumper products featuring fast installation, no tools required, and excellent corrosion resistance are expected to continue gaining market favor over the next several years.