Custom 3500kVA Side-Outlet BESS Auxiliary Transformer for Chile
05-12 2026 | By:
Introduction: Speeding Up South America’s Green Energy Wave with a 50-Day Record Delivery for Chile BESS
As Chile accelerates its renewable energy transition, the local market for Battery Energy Storage Systems (BESS) is experiencing massive, historic growth. We are proud to announce the successful delivery of two sets of high-specification 3500kVA oil-immersed medium voltage auxiliary transformers (BESS Auxiliary Medium Voltage Transformer) for a major utility-scale BESS project in Chile.
This project includes special nearshore and onboard marine application scenarios. Therefore, the equipment not only had to fully comply with American IEEE standards popular across North and South America, but it also required a stringent Classification Society Certificate. Facing an aggressive schedule, we utilized our agile global supply chain integration to complete the structure customization, full-scope routine testing, and official marine certification within an ultra-short 50-day (50days) lead time, guaranteeing on-time grid connection for our client.
Project Profile
- Project Location: Chile
- Application: Medium voltage auxiliary power supply for BESS and onboard marine application
- Product Name: 3500kVA Oil Immersed Transformer
- Quantity: 2 Sets
- Compliance Standard: IEEE (Institute of Electrical and Electronics Engineers)
- Terminal Configuration: 3500kVA By side outlet
- Lead Time: 50 Days (50days)
Core Technical Highlights & Customization Advantages
To adapt to Chile’s complex coastal/offshore climate conditions and the highly restricted layout of containerized BESS power plants, our engineering team introduced multiple tailor-made upgrades for these two 3500kVA transformers:
1. Innovative “By Side Outlet” Design for Space Optimization
Traditional transformers typically feature top-mounted bushings or standard enclosure layouts. However, space inside containerized BESS stations is always at a premium. We specially designed a 3500kVA side outlet (By side outlet) structure. This innovative configuration significantly shortens the cable tray routing distance between the transformer, the Power Conversion System (PCS), or the medium-voltage switchgear. It not only saves valuable footprint but also substantially reduces expensive cable losses and onsite installation labor costs.
2. Dual Endorsement: Full IEEE Compliance & Classification Society Certification
The electrical architecture is fully engineered based on high-standard IEEE specifications. It features exceptional short-circuit ride-through capabilities and ultra-low losses, allowing it to seamlessly handle harmonic loads and bidirectional transient surges generated during frequent BESS charge/discharge cycles. Because the project involves onboard and offshore environments, the transformers underwent strict onsite witness inspections and documentation reviews by an authoritative classification society before leaving the factory, successfully obtaining full marine compliance certificates.
3. High Corrosion Resistance & Marine-Grade Weatherability
To withstand the intensive salt spray, high humidity, and strong UV radiation of the Chilean coastal and offshore environment, the transformer tanks were treated with a high-grade C5 marine heavy-duty anti-corrosion coating system. The fully sealed tank structure completely isolates the internal dielectric fluid from external moisture and salt air. This prevents the deterioration of insulation oil and guarantees continuous, safe operation at sea.
50-Day Fast-Track Delivery: Breaking Industry Turnaround Records
In the energy storage sector, time equates directly to grid-connection revenue. A 50-day timeline for a 3500kVA medium-voltage transformer involving IEEE compliance, custom side-outlets, and live classification society witnessing is widely considered an industry extreme. We achieved this through seamless operations:
- Synchronized Digital R&D: Utilizing advanced 3D digital modeling, we finalized dynamic structure simulations and pre-approved blueprints with the classification society within days of order confirmation.
- Seamless Supply Chain Integration: Leveraging our deeply controlled, high-tier transformer supply chain, premium raw materials (such as high-permeability silicon steel sheets, specialized insulation oil, and custom side-outlet bushings) were mobilized within 24 hours.
- Strict In-House Combined Inspection: Before shipment, all IEEE-mandated routine and factory acceptance tests (FAT) were carried out at our Testing Center, fully witnessed by the classification society’s field surveyors.
Both units were successfully completed, packed, and shipped to Chile within 50 days, earning high praise from the project developers.
Conclusion: Deepening Expertise in Global Renewable and Marine Markets
Whether working with global benchmark manufacturers [3] or deep-diving into the broader Latin American and Southeast Asian green energy markets, efficiency, deep customization, and strict compliance remain the pillars for winning utility-scale infrastructure bids. The successful delivery of the Chile BESS project marks a new milestone in our manufacturing prowess, bridging the gap between “renewable energy storage” and “high-end maritime electrical engineering.”
If you are looking for BESS auxiliary medium voltage transformers, custom side-outlet specialized transformers, or IEEE-compliant equipment tailored for the Latin American market, contact our engineering experts today for a one-on-one technical proposal and the latest quotation
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