How do the hardware components in photovoltaic (PV) inverters differ from those in energy storage equipment

How do the hardware components in photovoltaic (PV) inverters differ from those in energy storage equipment?
In recent years, the new energy industry has boomed, driving a surge in demand for products such as PV inverters, energy storage cabinets, and charging piles. Many manufacturers of traditional industrial equipment have pivoted to new energy products, only to discover that hardware requirements differ significantly from what they were used to; the challenge lies not so much in the manufacturing process itself, but rather in material selection and corrosion resistance standards. Today, using PV inverters and energy storage equipment as examples, we will discuss the unique hardware requirements in this sector.
Outdoor corrosion resistance is a top priority. PV inverters are typically installed in outdoor or semi-outdoor environments, exposed to sun and rain, and—in coastal regions—to salt spray corrosion. While powder-coated cold-rolled steel might suffice for standard industrial equipment, applying the same method to PV inverters often leads to casing rust within two to three years. The current industry standard involves using galvanized steel (such as SGCC or DX51D) as the base material, followed by a powder coating finish. The galvanized layer provides sacrificial protection, preventing rapid rusting even if the coating sustains minor damage. Applications requiring higher durability may utilize 304 stainless steel or aluminum alloy, though this significantly increases costs. When manufacturing casings for PV clients, we typically recommend zirconium or silane-based pre-treatments; these are more environmentally friendly than traditional phosphating and offer superior coating adhesion.
Hardware integration for thermal management. The power components inside an inverter generate significant heat, imposing specific requirements on the design and installation of heat sinks and associated hardware. Heat sinks are usually made from extruded aluminum alloy, with CNC machining used to ensure the precision of mounting surfaces and holes. The hardware casing must incorporate adequate openings and mounting structures for the heat sink while ensuring waterproofing—for instance, by using waterproof gaskets or waterproof breathable valves where the heat sink passes through the casing. High-power inverters may employ heat pipe or liquid cooling solutions, placing even greater demands on the structural integrity and sealing capabilities of the hardware.
Special requirements for energy storage battery cabinets. Energy storage cabinets (ESS) essentially house a large number of battery cells within a single large enclosure, creating a unique set of requirements for the hardware components involved. First, fire resistance and flame retardancy: the cabinet materials must meet specific flame-retardant ratings, and surface treatments must not utilize flammable coatings. Second, explosion protection and pressure relief: the cabinet design must incorporate explosion-venting panels or pressure-relief ports to allow for directional pressure release in the event of a battery cell thermal runaway. Third, electromagnetic shielding: since Battery Management Systems (BMS) are highly sensitive to electromagnetic interference, cabinet seams and openings require shielding structures. Fourth, load-bearing capacity: a fully loaded energy storage cabinet can weigh several tons, so the structural integrity of the base and frame cannot be compromised. In our energy storage cabinet projects, we use cold-rolled or galvanized steel sheets thicker than 2.5mm for the frame, add reinforcing ribs at critical load-bearing points, and incorporate forklift slots and lifting structures at the base.
Hardware components for charging piles. The enclosures for DC fast-charging piles must be weather-resistant, sun-resistant, and impact-resistant. We typically specify 1.5mm–2.0mm galvanized steel or aluminum alloy sheets with an outdoor-grade powder coating (film thickness >80μm). Accessories such as charging gun holsters, cable management systems, and display mounts are hardware components; their designs must account for the durability required by frequent plugging and unplugging. Outdoor charging piles must also be designed to withstand lightning strikes and vandalism, with enclosures meeting the IK10 impact resistance rating. These factors must be thoroughly addressed during the drawing review stage.
Grounding and equipotential bonding. New energy equipment demands extremely high safety standards, requiring more rigorous grounding system designs than standard equipment. Reliable electrical connections must be ensured between the inverter enclosure, heat sinks, internal mounting plates, and door panels. Surface treatment requires special attention: grounding bolt mounting locations must remain free of insulating layers—either by masking off bare metal areas or by using serrated washers to penetrate the coating. At our factory, we pay close attention to these details during drawing reviews to prevent grounding continuity issues during the customer’s final assembly.
High-volume production with tight deadlines. The new energy industry is characterized by rapid volume scaling and urgent delivery schedules. A single inverter model may require a monthly output of several thousand units, yet the timeframe from drawing confirmation to the first delivery is often just two or three weeks. This puts the factory’s rapid response capabilities to the test—requiring swift mold development, advance material stocking, and flexible production scheduling. We maintain an in-house mold R&D team, allowing for significantly faster mold development compared to outsourcing; combined with our 20,000-square-meter facility featuring multiple parallel production lines, we hold a distinct advantage in handling urgent orders.
The new energy sector is evolving rapidly, with product forms and specifications constantly changing. If you are developing products such as PV inverters, energy storage systems, or charging piles and have questions regarding the metal structural components, feel free to send us your drawings so we can discuss them. We don’t need to provide a quote immediately; clarifying key issues—such as design feasibility, material selection, and anti-corrosion strategies—at the outset will ensure a smoother process moving forward.