Where Our Coatings Are Used
Use Cases
Power Connection and Bus Bar Hardware
Bus bars, battery interconnects, terminal lugs, tabs, ring terminals, and copper connection hardware that carry pack current with low contact resistance.
Battery Pack and Module Hardware
Cell holder hardware, module brackets, internal pack fasteners, contact plates, and tab-weld surfaces that have to perform reliably over thousands of charge cycles.
Enclosure and Cabinet Components
Battery cabinet sheet metal, frame structures, mounting brackets, wall-mount system hardware, door and latch hardware, and fire-rated enclosure components.
Thermal Management Hardware
Cooling plate brackets and fittings, thermal interface hardware, heat exchanger mounts, and ventilation grille components that regulate cell-pack temperatures.
Safety and Disconnect Hardware
Disconnect switch hardware, breaker mounts, fuse holders, grounding lugs, and bonding straps that keep the system safe and code-compliant.
What These Finishes Do
Key Benefits
Electrical Conductivity
Low contact resistance on high-current bus bars, interconnects, and terminal hardware where every milliohm of resistance shows up as efficiency loss and heat over the life of the system.
Long Service Life
Plating designed to match the 10 to 15+ year design lifespan that residential battery system warranties promise.
Corrosion Resistance
For enclosures and mounting hardware installed in garages, utility rooms, and outdoor wall-mount applications where humidity, temperature swings, and occasional condensation are constant.
Safety and Code Compliance
Finishes that meet the hardware-side requirements of UL 9540, UL 9540A, NEC Article 706, and IFC 1207 for energy storage systems.
Galvanic Compatibility
Process selection that prevents dissimilar-metal corrosion in battery systems that combine copper, aluminum, steel, and stainless components in tight assemblies.
Environmental Compliance
RoHS- and REACH-compliant, fully hexavalent-chromium-free chemistries that match the sustainability values driving residential energy storage adoption.
Protective Coatings for Household Battery Storage
Residential energy storage has gone from early-adopter to mainstream in less than a decade. A modern home battery system carries hundreds of amps through bus bars no bigger than a finger, sits on a garage wall for 15 years, cycles every single day, and is expected to operate as quietly and dependably as the wiring inside the wall behind it. The plating on every connection, bracket, and enclosure component is what makes that reliability possible.
CMC supplies the finishes that residential energy storage manufacturers specify when conductivity, longevity, and code compliance all have to hold over a 15-year design life. Our menu covers the full system: tin for bus bars and interconnects where low contact resistance keeps efficiency high and heat down; electroless nickel for precision module and pack hardware that can’t drift dimensionally over thousands of cycles; zinc-nickel for cabinet and outdoor wall-mount hardware exposed to weather; and zinc for the interior mounting hardware that holds it all together. Every chemistry we run is trivalent chromium passivated, fully hexavalent-chromium-free, and aligned with the sustainability values that drive customers to residential storage in the first place.
Across four facilities and 17 processing lines, we have the volume to support production programs at the scale this market is moving toward, and the engineering depth to walk through finish selection before the first prototype goes on a line. Send us a print or a part description and we’ll match the right process to the geometry, the operating environment, and the standard you need to meet.
Finishes we most often recommend for household battery storage
Building a residential energy storage system?
Send us a drawing, a specification, or a part description. We’ll recommend the right finish for the cells, the bus bars, the enclosure, and everything in between, scoped to the volume and the standards your program runs to.