How do you prevent water ingress at cable entry points?

Cable entries use sealed glands with rubber grommets positioned at the bottom or side as specified, combined with internal drip channels to route condensation away from equipment.

CUSTOM-BUILT · MOQ 1 PIECE

Custom Grid New Energy Battery Integrated – BESS Cabinet Manufacturer

Q: How do you quote? What are the payment terms?

Send your requirements and receive a factory-direct quotation within 24 hours. We accept T/T (30% deposit, 70% before shipment), and support FOB, CIF and DDP shipping terms.

Custom sheet metal, not off-the-shelf — built around your exact requirements.

Your RequirementsShare drawings, specs or hand sketches
Free DFM & CADProduction-ready drawings at no cost
Rapid PrototypingFirst sample ships in 7–10 days

SanJun Hardware is a specialized precision sheet metal
Our professional engineering team thoroughly resolves core
We deliver standard machining tolerance of ±0.1mm and
All sheet metal enclosures pass ISO9001, RoHS, EMC and LVD

✓ Free CAD design
✓ IP54–IP55
✓ ±0.1 mm tolerance
✓ ISO 9001 factory
✓ Quote in 24h

Submit Your Drawing Request a Quote Chat on WhatsApp

⚙

You Buy Manufacturing Capability, Not A Fixed Product

Every cabinet on this page was built for a specific project. Your dimensions, materials, protection grade, door layout and cable entries are all decided by you — we handle structure design, process planning, fabrication and testing. This page shows what we have done and what we can do for your project.

SPCC cold-rolled steel, 1.2–2.0mm thick
IP54–IP65 protection, salt-spray tested
Precision CNC bending, ±0.1mm tolerance
Full welding + powder coating finish
In-house tooling & stamping capability
One-stop: design → fabrication → assembly

Product Overview

SanJun Hardware provides one-stop OEM & ODM full-process sheet metal fabrication service for off-grid new energy integrated battery cabinets. We operate self-owned complete production workshops covering laser blanking, CNC precision bending, seamless full welding, structural reinforcement and electrostatic weather-resistant powder coating, delivering high-rigidity, ultra-precision metal enclosures for global off-grid solar power storage projects.

Core Competitive Edge: Free Custom CAD Drawing Design (No Buyer Drawings Needed)

Countless global purchasers halt customization plans due to missing cabinet structural drawings and unaffordable industrial design expenses. SanJun Hardware launches exclusive free drawing optimization service to solve this trouble once and for all.

According to your actual battery dimension, internal component layout, required IP waterproof rating, installation method and local outdoor operating environment, our senior engineers will finish production-ready 2D/3D CAD drawings and targeted structural optimization at zero cost, supporting unlimited revision cycles. This service drastically cuts your independent design expenditure and shortens your whole project launch cycle.

Key Industry Pain Points We Have Fully Resolved

Eliminate heavy-load cabinet sagging & permanent deformation: Reinforced thick frame + multi-layer internal rib structure upgrades overall cabinet rigidity, maintaining stable shape under long-term heavy battery load without bending.
Upgrade IP waterproof & dustproof capacity: Optimized integrated folded edge + full-circumference double EPDM sealing structure stably achieves IP54/IP65 protection grade, perfectly coping with rainy, dusty, coastal salt fog and high-temperature outdoor harsh environments.
Zero uneven assembly gaps: Strict ±0.1mm standard tolerance ensures precise alignment of mounting holes, cabinet doors and ventilation components for seamless module assembly.
Strengthen long-term anti-corrosion & weather resistance: Double treatment of hot-dip galvanizing + weather-resistant electrostatic powder coating effectively blocks rust, UV aging and salt fog erosion to extend outdoor service life greatly.
Customized efficient heat dissipation system: Tailored air duct and layered ventilation layout avoids battery overheating risk and guarantees long-term steady operation of energy storage systems.

Raw Material & Precision Manufacturing Standard

We adopt premium cold-rolled steel, galvanized steel and SUS304 stainless steel for different application environments. Standard dimensional tolerance: ±0.1mm; High-precision customized tolerance: ±0.05mm. Every enclosure undergoes strict full-inspection before shipment and complies with international ISO9001, RoHS, EMC and LVD compliance standards.

Wide Application Scenarios

Our custom sheet metal cabinet shells serve multiple mainstream off-grid energy sectors: off-grid solar PV storage systems, household emergency backup power stations, outdoor portable energy storage equipment, industrial & commercial distributed energy storage projects, RV/yacht mobile power supplies, remote mountainous & island independent off-grid power supply facilities.

😩 Typical Buyer Pain Points

No structural drawings ready for battery rack integration
Cabinet deformation under heavy battery module weight
Poor thermal design causing cell overheating and derating
Water ingress risking catastrophic battery damage
Fire safety gaps failing local certification
Long lead times delaying your BESS project rollout

✅ How SanJun Solves Them

Free production-ready CAD — you send pack layout, we draw
Reinforced frame with load-bearing cross members
Thermal design validated: vents, ducts, fan or AC integration
IP54–IP65 sealing, 100% tested before shipment
Fire-rated partitions and exhaust provisions available
Prototype in 7–10 days, mass production 15–25 days

★ Our Core Advantage

Free Production-Ready CAD Design

No drawings? No problem. Send your power module specs — our engineers deliver manufacturable CAD drawings free of charge, saving you $500+ in third-party design fees and weeks of engineering time.

Get My Free CAD Design

MOQ 1Piece — Prototype Friendly

±0.1mmStandard Tolerance

7–10Days to First Prototype

ISO 9001Certified Factory Direct

What You Can Customize

📐Dimensions & Layout

Fully custom sizes matched to your power module, battery bank and maintenance clearance.

🧱Material & Thickness

SPCC, SGCC galvanized, SUS304 or Aluminum 5052; 1.0–3.0 mm per load and budget.

💧Protection Grade

IP54–IP55 sealing packages; upgraded gaskets and glands for harsher environments.

🚪Door & Access

Single / double / front-access / rear-access doors with custom locks and hinges.

🔌Cable Entry

Bottom or side entries, sealed gland positions and sizes to your wiring plan.

🌡️Thermal System

Vents, fans, heat exchangers or AC integration — engineered to your heat load.

Manufacturing Capability & Specifications

Custom BESS Energy Storage Cabinet — Capability Range
Material Options	SPCC / SGCC galvanized steel / SUS304 stainless steel / Aluminum 5052
Thickness Range	1.2 – 3.0 mm (reinforced for battery rack load)
Protection Grade	IP54 – IP65 waterproof and dust-proof
Surface Treatment	Outdoor weather-resistant powder coating, 60 – 80 μm
Thermal Management	Air-cooled / liquid-cooled integration, fan or AC cutouts
Fire & Safety	Fire-rated partitions, exhaust vents, sensor mounting points
Cable Entry	Bottom / side sealed glands sized to your busbar layout
Mounting	Floor-standing with adjustable leveling feet / pad-mount base
Rated Capacity	Sized to your pack — from 50 kWh to multi-MWh containers
Packaging	Export-grade plywood case with anti-rust film

* All parameters are adjustable to your project. Contact us for a tailored engineering proposal.

How We Work With You — From RFQ to Delivery

Step 1 · 24hSend Requirements

Dimensions, module layout, or even a hand sketch — any format works.

Step 2 · FreeEngineering Review

Our engineers review manufacturability and propose structure optimizations.

Step 3 · FreeCAD Design

Production-ready drawings delivered for your confirmation. Unlimited revision until approved.

Step 4 · 7–10dPrototype

First article produced with full QC report and photos for your approval.

Step 5 · 15–25dMass Production

Batch fabrication with in-process inspection at every critical step.

Step 6Delivery & Support

Export plywood packing, FOB/CIF/DDP shipping, 12–24 months warranty.

Quality Control Before Every Shipment

Sealing test — every cabinet verified against IP54–IP55 rating
Dust-proof test — simulates long-term field dust exposure
Coating adhesion check — cross-hatch test on powder coating
Full-dimension verification — against approved CAD drawings
Weld & appearance inspection — seam quality and surface finish

Quality inspection reports and photos are provided with each order, so you can confirm workmanship before the goods leave our factory. Third-party inspection (SGS / TÜV / BV) is welcome.

Request QC Report Sample

Pricing & Trade Terms — No Surprises

⏱Quotation within 24 hours

Send specs → factory-direct quote in one business day. Volume pricing: unit cost typically drops 30–50% at 100+ pcs.

💳Payment

T/T 30% deposit, 70% balance before shipment. Sample orders and long-term partners: flexible terms available.

🚢Shipping

FOB, CIF and DDP supported. Export-grade plywood case with anti-rust film as standard.

🛡Warranty

12–24 months against manufacturing defects. Responsive after-sales with replacement parts support.

Proven in the Field

SanJun Hardware supplies custom BESS enclosures to energy storage integrators, solar EPCs and battery manufacturers worldwide. Tier-1 storage brands trust us with their cabinet programs — most started with a prototype and scaled to repeat container orders.

2,000+BESS cabinets delivered to EU & AU integrators

0Thermal or sealing failures reported to date

100+Custom projects completed per year

Frequently Asked Questions

What is the minimum order quantity?

MOQ is 1 piece. We welcome prototype and small-batch orders so you can validate the design before scaling up.

Can you design the cabinet if we don't have drawings?

Yes. Free production-ready CAD drawing design is our core service. Provide your power module dimensions, weight and layout requirements, and our engineers will produce manufacturable drawings for your confirmation.

What drawing formats do you accept?

We accept STEP, IGS, DWG, DXF and PDF sketches. Even a hand sketch with key dimensions is enough to start.

How do you quote? What are the payment terms?

Factory-direct quotation within 24 hours of receiving your requirements. Payment by T/T (30% deposit, 70% before shipment). FOB, CIF and DDP shipping terms supported.

What is the typical lead time?

Samples take 7–10 days; mass production takes 15–25 days depending on quantity and surface treatment requirements.

Can the cabinet achieve IP55 or higher protection?

Yes. Our standard sealing design reaches IP54–IP55, and we can upgrade gaskets, cable glands and door structures for harsher environments.

Do you ship internationally?

Yes, we export worldwide with export-grade plywood packaging, and we support FOB, CIF and DDP shipping terms.