Solar PV Compact Substation

Henan GNEE Electric Co., Ltd. is one of the most reliable manufacturers and suppliers of solar pv compact substation in China. If you're going to buy customized solar pv compact substation made in China, welcome to get quotation from our factory. Quality products and reasonable price are available.

A Solar PV Compact Substation,  is a fully prefabricated, modular PV All-in-One Unit specially designed for photovoltaic power generation systems.

As the core grid-connection equipment of solar power stations, this Solar Power Compact Substation integrates a full set of functional modules inside one sealed metal housing:

• PV Step-up Transformer (low-loss oil-immersed or dry-type)
• Medium voltage (MV) switchgear cabinet
• Low voltage (LV) feeder protection compartment
• Intelligent monitoring & RTU control system

After solar panels generate DC power and inverters convert it to low-voltage AC (0.315kV / 0.4kV / 0.69kV / 0.8kV), the built-in PV Step-up Transformer raises the voltage to 10kV, 20kV, 22kV, 33kV, 34.5kV or 35kV medium voltage, realizing safe, stable grid connection for solar farms.

Different from traditional separate transformer room construction, the Solar PV Compact Substation finishes all wiring, testing and assembly in our factory, directly delivered as a complete skid-mounted unit for outdoor installation.

2.1 PV Step-up Transformer 

The heart of the Photovoltaic Compact Substation. GNEE Electric adopts low-noise, low-no-load-loss oil-immersed transformers or dry-type transformers, with energy efficiency levels meeting GB 20052 (S13 and above) and IEC 60076 requirements.

The transformer is specifically designed for PV applications with anti-harmonic winding design, enhanced thermal cycling capability and overload margin to accommodate fluctuating solar power output.

Capacity ranges from 500kVA to 3150kVA with full customization support, perfectly matching small distributed rooftop PV, agricultural PV, fishery PV and large ground-mounted solar power plants.

2.2 Medium Voltage (MV) Switchgear Chamber

Equipped with vacuum circuit breakers (VCB) or load-break switch-fuse combinations, current transformers (CT), voltage transformers (PT), microprocessor-based protection relays, isolating and earthing switches, and surge arresters.

The mechanical and electromagnetic five-prevention safety interlock system ensures that the high-voltage door cannot be opened when live, fully meeting IEC 62271-200, GB/T 11022 and GB/T 17467 safety standards to eliminate electric shock risks for maintenance staff.

2.3 Low Voltage (LV) Protection Cabinet

Contains main circuit breakers (ACB/MCCB), surge protective devices (SPD), power quality meters, current transformers, anti-islanding protection devices and auxiliary power supply. Supports intelligent metering, remote fault alarm and data upload, enabling unattended and low-maintenance solar plant operation.

2.4 Weatherproof Enclosure Housing

Our Solar Power Compact Substation uses hot-dip galvanized steel plate with electrostatic powder coating (epoxy primer + polyester/fluorocarbon topcoat), IP54 protection grade as standard (IP55/IP65 optional for extreme environments). The cabinet resists salt spray, sandstorm, high temperature, humidity and rain, suitable for coastal, desert and mountain harsh environments. CNC laser cutting guarantees cabinet precision, with 15–25 years of corrosion-free performance in standard environments (heavy-duty coating available for 25+ years in extreme environments).

2.5 Intelligent Remote Monitoring System

Built-in RTU telemetry unit tracks transformer temperature (oil temperature for oil-immersed type; winding temperature via PT100 sensors for dry type), HV/LV voltage, current, power factor, and fault signals. Operators can monitor, diagnose and remotely control the PV Transformer Substation via cloud platform, cutting manual inspection costs drastically.

3.1 Ultra-Compact Footprint, Save Solar Site Land

As an integrated PV All-in-One Unit, the Solar PV Compact Substation merges HV, LV and transformer sections into one single structure. It reduces approximately 60% land occupation compared with traditional separate power distribution houses, especially critical for limited-space rooftop commercial PV and distributed solar projects.

3.2 Plug-and-Play Factory Pre-Assembly

100% pre-wired, fully tested before shipment. On-site installation only needs concrete foundation and cable connection, cutting construction period and civil engineering investment by over 50%. Perfect for rapid solar project deployment.

3.3 Superior Safety & Long Service Life

• Fully enclosed insulated structure with five-prevention mechanical and electromagnetic safety interlock system
• Anti-condensation, dustproof, waterproof cabinet design
• Standard service life up to 25–30 years with minimal routine maintenance

3.4 Wide Environmental Adaptability

Operating temperature range: -25°C ~ +40°C (-40°C optional for cold climates), altitude ≤1000m (high-altitude customized version available), anti-salt spray coating for coastal PV projects, dust-filtered forced ventilation or closed-loop air conditioning system for desert solar power stations. Passed strict salt spray aging and vibration tests.

3.5 Full Customization Support (OEM & ODM)

GNEE Electric offers one-stop custom service for PV Step-Up Compact Substation:

• Adjustable voltage levels: 10kV / 20kV / 22kV / 33kV / 34.5kV / 35kV
• Custom capacity: 500kVA – 3150kVA oil-immersed or dry-type Solar Step-up Transformer (larger capacity available upon request)
• Custom cabinet size, ventilation, air conditioning, fire protection configuration
• Custom communication protocols (Modbus RTU/TCP, IEC 61850) for grid integration
• Custom exterior color, logo and door layout for brand requirements

3.6 Authoritative Global Certifications

Our Solar Transformer Substation series holds ISO9001, CE, CB, KEMA, CCC certificates, fully compliant with IEC 62271-202, GB/T 17467, IEEE and ANSI international standards, eligible for EU, Southeast Asia, Middle East, Africa and American solar tender projects. (UL/CSA certifications available upon request for North American markets.)

• Large utility ground-mounted solar farms
• Commercial & industrial rooftop distributed PV systems
• Agrivoltaic / fishery complementary solar power plants
• Off-grid microgrid & grid-connected PV stations
• Energy storage + PV hybrid power stations
• Factory, industrial park, commercial shopping mall solar grid connection

Professional Factory Production Capacity

GNEE Electric owns standardized 30,000m² electrical equipment workshop, automated CNC cutting, bending and wiring production lines, stable monthly output over 200 sets Solar Power Compact Substation, short lead time for bulk orders.

Strict Full-Factory Testing

Every PV All-in-One Unit undergoes withstand voltage, short-circuit, temperature rise, protection relay function and communication protocol tests before delivery to eliminate on-site failure risks.

Cost-Effective Factory Direct Supply

No middlemen markup, stable raw material supply chain ensures competitive prices for global solar EPC contractors, project developers and electrical distributors.

Complete Global After-Sales Service

We provide detailed installation manuals, remote technical guidance and overseas engineer dispatch service. Spare parts inventory supports fast worldwide delivery to reduce project downtime.

Flexible Global Payment & Logistics

Accept T/T, L/C, Western Union, PayPal, MoneyGram payment terms. Support sea freight, air freight and land transport to all countries, professional export packaging to avoid cabinet damage during transit.

Get Custom Quotation for Solar PV Compact Substation

Are you an EPC contractor, solar project developer, electrical wholesaler or power plant investor looking for reliable PV Step-Up Compact Substation, PV Transformer Substation or PV All-in-One Unit?

GNEE Electric's professional solar electrical engineering team can design a tailor-made Solar Power Compact Substation solution matching your PV station capacity, local grid voltage and site environment.

Send your project parameters

Fill in the inquiry form, send your project parameters (solar plant MW, HV voltage, installation environment) to our sales email, or WhatsApp us directly - we will reply with detailed technical drawing, quotation and certification documents within 24 hours!

Q1: What's the difference between Solar PV Compact Substation and regular box transformer?

A PV Transformer Substation (Solar PV Compact Substation) is specially optimized for photovoltaic fluctuating power output. It incorporates anti-harmonic winding design, solar-specific protection logic (including anti-islanding protection), enhanced thermal cycling capability, and inverter-matched LV cabinet, while ordinary box transformers are designed only for conventional city power distribution with steady load profiles.

Q2: Can your PV Step-Up Compact Substation work in coastal salt fog areas?

Yes. We provide two anti-corrosion grades: standard hot-dip galvanizing with powder coating (≥15 years corrosion resistance) and heavy-duty salt-spray resistant coating for coastal solar plants (≥25 years corrosion-free operation).

Q3: Do you support OEM & ODM customized PV All-in-One Unit?

Absolutely. GNEE Electric offers full OEM service including cabinet logo printing, internal component brand selection, monitoring system customization and special size modification according to your solar project drawing.

Q4: What's the delivery time for bulk orders of Solar Transformer Substation?

Standard medium-capacity units (500–1600kVA): 15–20 working days. Large-capacity container-type Solar Power Compact Substation (2000–3150kVA): 20–30 working days based on order quantity and customization scope.

Q5: Can the Photovoltaic Compact Substation realize remote monitoring?

All our standard models come with built-in RTU telemetry units, supporting Modbus RTU/TCP and IEC 61850 communication protocols for cloud remote monitoring, fault push notifications and real-time data statistics.

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