# GE Vernova FLEXINVERTER BESS MV Transformer 3500 kVA 34.5/0.69 kV

> GE Vernova FLEXINVERTER medium-voltage transformer family for larger containerized BESS blocks.

> SKU: VF-GEV-FLEX-BESS-3500-345 | Brand: GE Vernova (General Electric) | Category: Power & Energy Equipment / Transformers / Renewable Energy Transformers (PV, Wind & BESS) / Battery Energy Storage (BESS) Transformers

**Voltformer canonical:** https://voltformer.com/product/ge-vernova-flexinverter-bess-3500-kva-transformer - markdown version: https://voltformer.com/product/ge-vernova-flexinverter-bess-3500-kva-transformer.md

## Overview

GE Vernova FLEXINVERTER BESS MV Transformer 3500 kVA 34.5/0.69 kV is intended for 2.5 MW / 5 MWh Containerized BESS Grid Integration. Configured electrical data: 3500 kVA, 34.5/0.69 kV primary/secondary voltage, 50 Hz, 3-phase, vector group Dyn11 and short-circuit impedance 6.5%. Construction: Copper (Cu-Cu); cooling: ONAN; loss class: Ecodesign Tier 2. These values support preliminary engineering selection; verify insulation levels, thermal limits, short-circuit duty, installation conditions and applicable standards against the manufacturer datasheet and the site study.

- **Application:** 2.5 MW / 5 MWh Containerized BESS Grid Integration
- **Target industries:** Grid-Scale Battery Storage (BESS), Frequency Control Stations
- **Brand:** [GE Vernova (General Electric)](https://voltformer.com/brand/ge-vernova.md) - GE Vernova Grid Solutions provides high-performance protection, control, and automation solutions including the renowned Multilin 8 Series and MiCOM Agile product lines.
- **Category:** [Power & Energy Equipment](https://voltformer.com/catalog.md) / **Transformers** / [Renewable Energy Transformers (PV, Wind & BESS)](https://voltformer.com/category/renewable-energy-transformers.md): Multi-winding, harmonic-tolerant step-up transformers for solar (PV), wind and battery storage (BESS) plants. / [Battery Energy Storage (BESS) Transformers](https://voltformer.com/category/renewable-energy-transformers/bess-battery-storage-transformers.md)

## Technical Specifications

| Property | Value |
|---|---|
| Rated power | 3500 kVA |
| Primary / secondary voltage | 34.5 kV / 0.69 kV (±2 x 2.5%) |
| Frequency / phases | 50 Hz / 3-phase - Dyn11 |
| Short-circuit impedance (Uk) | 6.5% |
| No-load loss P0 | 2.31 kW |
| Load loss Pk | 20.3 kW |
| Calculated efficiency (power factor = 1) | 99.3581% at 100% load; 99.5798% at 50% load |
| Loss class | Ecodesign Tier 2 |
| Windings | Copper (Cu-Cu) - cooling: ONAN - insulation: Class A |
| Temperature rise | 65 K - sound pressure: 55 dB(A) |
| Mass and dimensions | 6900 kg - 2300×1400×2250 mm |
| Enclosure | IP54 - wheel gauge: 1070 mm |
| LI / AC withstand | 170 kV peak / 70 kV rms - partial discharge: 5 pC |
| Environment | -25°C / +40°C; altitude ≤ 1000 m |
| Core steel | CRGO Laser-Treated Grain-Oriented Silicon Steel (23ZDMH85 / Baosteel B23R085) |
| Bushings / terminals | Direct Copper Busbar Terminals (Busbar Integrated / IP00-IP31) |

## Standards

- IEC 60076
- IEEE C57
- TS EN 50708 series

## Accessories

**Included:** FLEXINVERTER interface, MV RMU interface, Remote monitoring interface
**Optional:** Grid-forming controls, Black-start package, Project-specific harmonic filter

## Official sources

- https://www.gevernova.com/electrification/systems/energy-storage/solar-storage/flexinverter-bess
- https://www.gevernova.com/electrification/equipment/transformers/power-transformers
- https://www.gevernova.com/electrification/automation/protection-control-metering/

- **Source scope:** manufacturer-family
- **Last reviewed:** 2026-09-13

Manufacturer family/application source. GE Vernova FLEXINVERTER integrates an inverter, medium-voltage power transformer and optional RMU/auxiliary equipment in a BESS power station. The 3500 kVA variant is a configured MV envelope; final thermal cycling and fault-duty data require the project proposal. Exact order code, guaranteed losses, dimensions, insulation level, cooling stage, winding material and project options must be confirmed with the OEM before procurement or an SLD study.

## Pricing & Logistics

- Pricing type: RFQ (On Request) - Indicative range: $34,500 – $41,000 USD
- Delivery time: 2–8 weeks (may vary depending on technical configuration, factory capacity and destination) - Warranty: 36 months
- Compliance candidates: IEC 60076, IEEE C57, TS EN 50708 series. Verify applicability and conformity against the exact offered model and project jurisdiction.

## RFQ

Request a formal factory quotation via Voltformer RFQ:

```json
POST https://voltformer.com/api/v1/rfq
{"companyName":"Example Energy","email":"procurement@example.com","items":[{"skuOrId":"VF-GEV-FLEX-BESS-3500-345","quantity":1}]}
```

Full catalog JSON: https://voltformer.com/agent-catalog.json - OpenAPI: https://voltformer.com/openapi.json