Thermoformed PC-FR and ABS FR V-0 enclosures for solar inverters, combiner boxes, junction boxes, and battery storage systems. UL 94 V-0 fire-rated, IP65 weather-sealed, and built to survive 25 years of desert sun, monsoon rain, and extreme temperature cycling.
V-0
UL 94 Fire Rating
130°C
Max Continuous Temp
IP65
Weather Sealing
25 yr
Design Life
Why Thermoforming for Solar
Solar installations demand enclosures that survive decades of extreme UV, temperature cycling, and monsoon conditions — while meeting fire safety codes for high-voltage DC equipment.
PC-FR and ABS FR V-0 materials are self-extinguishing and meet UL 94 V-0 flammability standards. Critical for solar inverter enclosures where DC arc faults and thermal events demand fire-safe housings — not just fire-resistant coatings.
CNC-machined aluminum molds cost a fraction of injection mold tooling. Solar EPC contractors deploying 500-5,000 inverter covers per year get production-grade quality without the $100K+ injection molding investment.
PC-FR maintains structural integrity from -40°C to +130°C continuous use. Solar inverters in desert installations (Rajasthan, Middle East, North Africa) generate significant internal heat — thermoformed PC enclosures handle it without warping.
Precision-formed gasket channels, integrated drip edges, and cable gland cutouts achieve IP65-rated sealing. Protects sensitive power electronics from monsoon rain, dust storms, and humidity in tropical and arid solar installations.
Form central inverter covers exceeding 2 metres in a single shot. Eliminates multi-piece assemblies and seam joints that become leak points and corrosion initiators over a 25-year solar plant lifecycle.
We extrude fire-retardant sheets from raw pellets in-house — including co-extruded sheets with UV-stable ASA cap layers on the weather face and FR-rated core material. Complete material traceability from pellet to finished enclosure.
Solar Component Portfolio
From string inverter covers to utility-scale BESS housings — every enclosure a solar plant needs, formed in fire-retardant material rated for the application.
Thermoformed fire-retardant enclosures for string inverters deployed across rooftop and ground-mount solar installations. PC-FR and ABS FR V-0 materials meet UL 94 V-0 flammability ratings. Integrated ventilation louvers, cable entry points, and mounting bosses formed in a single shot — eliminating secondary machining.
Large-format thermoformed housings for central inverters in utility-scale solar farms. Single-piece panels exceeding 2 metres reduce seam joints and improve weather sealing. ASA outer skins provide decade-long UV stability without repainting — critical for installations in Rajasthan, Middle East, and other high-irradiance regions.
Fire-retardant thermoformed housings for DC combiner boxes that aggregate string outputs before the inverter. PC-FR material provides self-extinguishing protection around high-voltage DC connections. Precision-formed cable gland cutouts and DIN rail mounting channels reduce field installation time.
Compact thermoformed covers for AC and DC junction boxes across the solar plant. Available in flame-retardant ABS and PC grades with UV-stabilised ASA cap layers for outdoor longevity. Snap-fit closures and gasket channels formed directly into the part ensure IP-rated sealing.
Heavy-gauge thermoformed housings for battery energy storage systems (BESS) co-located with solar plants. PC-FR material meets stringent fire safety requirements for lithium-ion battery containment. Formed ventilation channels manage thermal runaway exhaust paths.
Ruggedized thermoformed enclosures for weather stations, data loggers, communication modules, and SCADA equipment deployed across solar farms. ASA material withstands desert UV, monsoon rain, and temperature cycling from -20°C to +60°C ambient without degradation.
Solar Segments
Every solar installation type has unique environmental and safety requirements. We match the right thermoforming material and design to your deployment scenario.
Commercial and industrial rooftop installations with string inverters mounted on walls or under canopies. Compact FR enclosures that protect inverters from rain, dust, and direct sun exposure while maintaining adequate ventilation for heat dissipation.
Materials: ABS FR V-0, ASA
Parts: String inverter covers, junction box housings, cable trays
Multi-megawatt solar farms with central inverters, combiner boxes, and transformer stations. Large-format thermoformed panels for inverter shelters, combiner enclosures, and perimeter equipment housings. UV-stable materials for 25+ year outdoor exposure.
Materials: PC-FR, ASA, ABS FR V-0
Parts: Central inverter housings, combiner boxes, SCADA enclosures
Hybrid solar-plus-storage installations where battery enclosures must meet stringent fire safety codes. PC-FR thermoformed housings for battery racks, BMS enclosures, and thermal management ducting. Designed for lithium-ion fire containment compliance.
Materials: PC-FR, ABS FR V-0
Parts: Battery rack covers, BMS housings, thermal exhaust ducts
Elevated solar structures over parking lots and walkways. Thermoformed trim panels, cable management covers, and inverter enclosures that double as architectural elements. Custom colours and textures for aesthetic integration.
Materials: ASA, ABS, HIPS
Parts: Trim panels, cable covers, inverter housings, column cladding
Solar arrays on reservoirs and water bodies. Enclosures must resist humidity, salt spray, and constant water proximity. ASA and PETG materials provide superior moisture and chemical resistance for floating inverter and junction box housings.
Materials: ASA, PETG, ABS FR V-0
Parts: Floating inverter covers, waterproof junction boxes, cable floats
Solar-powered irrigation pumps and agrivoltaic installations. Ruggedized enclosures for variable frequency drives (VFDs), pump controllers, and field junction boxes. Dust-sealed and UV-stable for open-field deployment.
Materials: ASA, ABS
Parts: VFD enclosures, pump controller housings, field junction boxes
Materials for Solar
Every material is selected for the specific demands of solar installations — fire safety, UV resistance, temperature extremes, and moisture protection.
| Material | Solar Application | Key Properties | Max Temp |
|---|---|---|---|
| PC-FR (Polycarbonate FR) | Inverter covers, combiner boxes, BESS enclosures | Fire retardant UL 94 V-0, self-extinguishing, high heat resistance, impact tough | Up to 130°C |
| ABS FR V-0 | Junction box covers, string inverter housings, cable trays | Flame retardant, self-extinguishing, UL 94 V-0, cost-effective | Up to 80°C |
| ASA | Outdoor inverter covers, monitoring enclosures, trim panels | UV stable 10+ years, weather resistant, colour-through, no painting | Up to 90°C |
| PC (Lexan) | Transparent inspection windows, display covers, lighting housings | Optically clear, 250x stronger than glass, high heat resistance | Up to 130°C |
| PETG | Chemical-resistant housings, floating solar enclosures | Chemical resistant, moisture resistant, good clarity, impact tough | Up to 70°C |
| HIPS | Interior liners, non-structural covers, prototype enclosures | Lowest cost, excellent formability, recyclable | Up to 70°C |
We extrude fire-retardant sheets from raw pellets in-house — including co-extruded sheets with UV-stable ASA cap layers on the weather-exposed face and FR-rated core material underneath. This vertical integration ensures consistent fire-retardant properties across every sheet, complete material traceability, and eliminates supply chain dependencies for solar EPC contractors.
Material Selection Guide
Our engineers recommend the right material for every solar enclosure based on fire safety requirements, environmental exposure, and cost targets.
| Application | Recommended | Why This Material | Alternative |
|---|---|---|---|
| String Inverter Covers | ABS FR V-0 | UL 94 V-0 self-extinguishing at lowest cost. Ideal for high-volume string inverter deployments where fire rating is mandatory. | PC-FR |
| Central Inverter Enclosures | PC-FR | Highest heat resistance (130°C) and fire rating. Central inverters generate more heat and carry higher DC voltages. | ABS FR V-0 |
| Combiner Box Housings | PC-FR | Self-extinguishing protection around high-voltage DC connections. Arc fault containment requires the highest fire safety grade. | ABS FR V-0 |
| Outdoor Junction Boxes | ASA | 10+ year UV stability without coatings. Colour-through eliminates paint maintenance across thousands of field boxes. | ABS FR V-0 |
| BESS Battery Enclosures | PC-FR | Meets lithium-ion battery fire containment codes. High heat resistance handles thermal runaway exhaust temperatures. | ABS FR V-0 + PC cap |
| SCADA & Monitoring Boxes | ASA | All-weather outdoor durability. No yellowing or chalking over decades of desert sun exposure. | ABS + UV coating |
| Floating Solar Enclosures | PETG | Superior moisture and chemical resistance. Handles constant water proximity and humidity without degradation. | ASA |
| Solar Carport Trim Panels | ASA | Architectural-grade colour-through finish. Custom colours match building aesthetics without painting. | ABS + paint |
Engineering Spotlight
Traditional solar inverter enclosures are fabricated from painted galvanised steel or aluminium. Over a 25-year plant life, metal enclosures face corrosion at weld joints, paint degradation from UV, and galvanic corrosion in coastal or high-humidity environments. Thermoformed PC-FR enclosures are inherently corrosion-proof, electrically insulating (no grounding required), 30-50% lighter for easier field installation, and maintain their fire-retardant properties throughout the entire plant lifecycle — not just until the paint chips.
Process Comparison
How vacuum forming compares to other manufacturing processes commonly used for solar inverter and equipment enclosures.
| Factor | Thermoforming | Sheet Metal | Injection Molding | FRP / GRP |
|---|---|---|---|---|
| Tooling Cost | $5K-25K | $10K-40K | $80K-300K | $5K-20K |
| Mold Lead Time | 3-4 weeks | 2-4 weeks | 12-20 weeks | 4-8 weeks |
| Unit Cost (1,000 pcs) | $$ | $$$ | $$ | $$$$ |
| Part Weight | Light | Heavy | Light | Medium |
| Corrosion Resistance | Immune | Requires coating | Immune | Excellent |
| Fire Rating (UL 94) | V-0 (PC-FR) | Inherent | V-0 available | Variable |
| UV Stability | 10+ years (ASA) | Paint dependent | Material dependent | Good |
| Ideal Volume | 200-10,000/yr | Any | 10,000+/yr | 50-500/yr |
Thermoforming is the optimal process for solar EPC contractors deploying 200-10,000 enclosures per year — corrosion-proof, fire-rated, and 70% lower tooling cost than injection molding.Read the full comparison guide →
Send us your drawings, 3D models, or specifications. We'll recommend the right fire-retardant material, provide a DFM review, and quote your solar enclosures — typically within 48 hours.