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Solar & Energy Storage Transformers

PV inverter-duty step-up transformers, BESS PCS interfaces and integrated substations, with a separate auxiliary isolation-transformer series.

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Angle-adjusted visualization of a PCS-integrated transformer substation, viewed more directly toward the long cabinet facade — AI-assisted perspective visualization based on an industry reference image · Industry photo reference ↗

4 CONFIGURATIONS & AUXILIARY SERIES

Choose by product duty.

Search by model or rated power ↗

Main-power & integrated-station configurations

Choose the application first. These entries collect engineering inputs; they are not released model datasheets or guaranteed capacity ranges.

Solar PV main-power interface

Solar PV Inverter-Duty Step-Up Transformers ↗

Project configuration · ratings to confirm

Third-party product photograph · source identified on the detail page.

An AC-side step-up transformer connects PV inverter output to the medium-voltage collection network. Submit the inverter specification and grid requirements for an engineered configuration; auxiliary isolation transformers serve a different circuit.

Rated power: Specify transformer kVA / MVA, inverter apparent power and operating power factor
Voltage ratio: Specify inverter-side AC voltage and collection-system voltage
Application: PV inverter AC output to the medium-voltage collection system

Engineering inputs & scope ↗Required drawings & documents ↗

Battery storage power-conversion interface

BESS PCS Interface Transformers ↗

Project configuration · ratings to confirm

Third-party product photograph · source identified on the detail page.

A BESS transformer interfaces the AC side of the Power Conversion System (PCS) with the grid. Review charging and discharging duty, bidirectional power flow and converter compatibility. The battery DC circuit connects through the PCS, not directly to a conventional AC transformer.

Rated power: Specify continuous apparent power in both charging and discharging modes
AC voltages: Provide PCS AC voltage, grid voltage and permissible voltage variation
Application: PCS AC interface to the grid / medium-voltage collection system

Engineering inputs & scope ↗Required drawings & documents ↗

Inverter / PCS + transformer + MV equipment

Integrated PV & BESS Transformer Substations ↗

Project configuration · ratings to confirm

Third-party product photograph · source identified on the detail page.

An integrated station brings the inverter or PCS, step-up transformer and medium-voltage equipment into a coordinated package. Define the supply boundary: a transformer, a transformer substation and a complete inverter/PCS station are different scopes.

System scope: Identify whether inverter / PCS, transformer, MV switchgear and auxiliaries are included
Total rating: Define station MVA, number of converter blocks and transformer winding arrangement
Network: Specify MV rated voltage, insulation level, fault level and protection scheme

Engineering inputs & scope ↗Required drawings & documents ↗

Auxiliary isolation transformers

SG10 / FSG supplies auxiliary and control circuits. It is separate from the main PV or BESS step-up transformer.

Renewable Energy Auxiliary Transformers

Wind & Solar Auxiliary Isolation Transformers ↗

Series: SG10 / FSG

1 technical table

Three-phase dry-type isolation transformers for renewable-energy auxiliary systems.

7 published model designations

FSG-10-EISA-690/400 · FSG-15-EISA-690/400 · FSG-20-EISA-690/400 · FSG-30-EISA-690/400 · FSG-50-EISA-690/400 …

Preview published data

Three-phase isolation-transformer ratings and dimensions · first 4 rows
Model	Drawing	Inverter power (KW)	Rated output current (A)	Three-phase input	Three-phase output	Efficiency	Weight (KG)	W (mm)	D (mm)	H (mm)	W0 (mm)	D0 (mm)
FSG-10-EISA-690/400	A	10	14.4	AC690V	AC400V	95%	110	430	260	450	240	176
FSG-15-EISA-690/400	A	15	21.7	AC690V	AC400V	96%	170	430	320	450	240	236
FSG-20-EISA-690/400	A	20	28.9	AC690V	AC400V	96.3%	175	430	320	450	240	236
FSG-30-EISA-690/400	B	30	43.3	AC690V	AC400V	96.6%	260	430	390	520	240	276

All models & specifications ↗Drawings & documents ↗

TECHNICAL SELECTION / VERIFIED INDUSTRY EXAMPLES

Compare the duty before the model code.

Domestic series codes and international product-family names describe different design and supply scopes. Use the original manufacturer’s designation together with its application and published specification.

Official manufacturer examples · checked 2 November 2026
Manufacturer / product	Published model / family	Rated power reference	Voltage reference	Application distinction
Pearl Electric · Oil-immersed compact substation ↗	No model code stated on the cited page	1,000–2,500 kVA	HV: 11 / 20 / 22 / 33 kV; LV: 0.4 / 0.69 kV	Integrated station reference; not a standalone transformer rating schedule.
Pearl Electric · Dry-type compact substation ↗	No model code stated on the cited page	3,000–5,000 kVA	HV: 11 / 20 / 22 / 33 kV; LV: 0.4 / 0.69 kV	Dry-type station example; converter and transformer scope must be identified.
CHINT · PV pad-mounted transformer ↗	ZGS11-Z.T	Not stated in this brochure entry	Up to 40.5 kV; this is a stated voltage limit, not a voltage ratio.	Photovoltaic power-station application. Do not infer its kVA range from adjacent products.
Eaton · Low-voltage solar-duty transformer ↗	Solar duty product family; individual codes depend on configuration	15–300 kVA	600 V voltage class; not a specified winding voltage ratio.	Bidirectional low-voltage application; not a medium-voltage BESS main step-up transformer.

PV and BESS: the AC interface

A conventional transformer connects to the inverter or PCS AC side. Battery DC connects through the PCS. Review converter harmonics, loading cycles, winding arrangement and earthing; the required design is application-specific.

Hitachi Energy · solar & BESS engineering reference ↗

Rated power: kVA / MVA

PV array MWp and battery MWh are not transformer apparent-power ratings. Provide inverter or PCS apparent power, AC voltages, power factor, reactive-power duty and ambient conditions when requesting a transformer.

HPS · solar-duty sizing reference ↗

SOLAR PV / BESS / AUXILIARY SUPPLIES

Define the transformer duty.

Solar PV grid connection

Share inverter output voltage, plant capacity, collection-system voltage, earthing arrangement and grid connection requirements for transformer configuration review.

Battery energy storage integration

Share PCS voltage, charging and discharging duty, bidirectional power-flow requirements, harmonic data, cooling conditions and protection interfaces.

Auxiliary & control power

The SG10 / FSG series covers auxiliary isolation transformers. These are separate from main PV or BESS step-up transformers; project-specific ratings require engineering confirmation.

Explore solar & storage applications ↗

PROJECT SPECIFICATION

Prepare your inquiry.

Send the required ratings, application and available drawings. Refer to the published model tables for the documented design.

01Transformer kVA / MVA, PV inverter or BESS PCS AC voltage, and grid voltage
02Winding arrangement, vector group, earthing and isolation requirements
03Harmonic data, charge/discharge cycle, temperature and altitude
04Transformer-only or integrated-station scope, protection and required test documentation
05Quantity, destination and required delivery date

TALK TO JIADEST

Discuss your solar & energy storage transformers requirements.

Share your rated capacity, voltages, application and destination. Our team can review the configuration and documentation required for your order.

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