Prefabricated Substation for EV Charging
Deploy 70% Faster, Save 30%+ on Cost
GOHO prefabricated substations deliver complete MV/LV power distribution for EV charging stations in a single, factory-assembled enclosure. Get your charging hub grid-connected in weeks, not months — with guaranteed quality and significantly lower civil works costs.
The Smarter Way to Power EV Charging Stations
Traditional site-built substations slow down your charging network rollout and drive up costs. Prefabricated substations solve both problems — factory-built, tested, and delivered ready for rapid on-site deployment.
Prefabricated vs. Site-Built: By The Numbers
GOHO Prefabricated Substation Series
Choose from two proven prefabricated substation designs, both optimized for EV charging applications. European type for maximum configurability, American type for ultra-compact pad-mounted deployment.
- Capacity Range50 – 2500 kVA
- MV Voltage6 – 35 kV
- LV Voltage400V / 480V
- ConfigurationMV + Transformer + LV in one box
- EnclosureMetal-clad, IP3X-IP54
- Best ForHigh-capacity charging hubs & fleets
The YBW series integrates MV switchgear (HXGN15-12 RMU), distribution transformer, and LV distribution (GGD series) in a single compact kiosk. Fully customizable for charging station requirements including PFC and harmonic filtering.
- Capacity Range50 – 1600 kVA
- MV Voltage10 – 35 kV
- LV Voltage400V / 480V
- ConfigurationPad-mounted, compact design
- EnclosureSteel tank, IP65 rated
- Best ForUrban chargers & tight-space sites
Pad-mounted American-style substations combine the MV load break switch, transformer, and LV breaker in a single tamper-proof enclosure. Ideal for public charging stations where aesthetics and safety are paramount.
Substation Sizing by Charging Station Capacity
Use this quick reference to find the right prefabricated substation for your EV charging project. Our engineering team provides custom sizing based on your exact charger mix and site conditions.
| Charging Capacity | Recommended Substation | MV Switchgear | LV Switchgear |
|---|---|---|---|
| 120-240 kW 4-8 x 30kW chargers | 315 kVA Prefab Substation | HXGN15-12 RMU (2-way) | GGD LV Distribution Panel |
| 360-500 kW 6-10 x 60kW chargers | 630 kVA Prefab Substation | HXGN15-12 RMU (2-way + breaker) | GGD + PFC + Harmonic Filter |
| 720 kW – 1 MW 8-16 x 60-120kW DCFC | 1250 kVA Prefab Substation | HXGN15-12 RMU + VCB | GGD + PFC + AHF + Metering |
| 1 – 2 MW 16-32 x 60-120kW DCFC | 2000-2500 kVA Prefab Substation | KYN28-12 VCB Panel | MNS/GCK + PFC + AHF + SCADA |
| 2 MW+ Multi-megawatt hub / fleet depot | Custom Multi-Unit Solution | Custom MV Switchgear Configuration | Custom LV + Protection + SCADA |
| Substation Size | Standard Configuration | Standard Lead Time | Expedited (Rush) | Shipping Time |
|---|---|---|---|---|
| 315 – 630 kVA Small to medium charging sites | Standard RMU + LV panel | 4 – 6 weeks | 2 – 3 weeks | 2 – 4 weeks (sea) 3 – 5 days (air) |
| 800 – 1250 kVA Large charging hubs | RMU/VCB + LV + PFC | 6 – 8 weeks | 4 – 5 weeks | 2 – 4 weeks (sea) 3 – 5 days (air) |
| 1600 – 2500 kVA Multi-megawatt hubs | VCB + LV + PFC + AHF + SCADA | 8 – 10 weeks | 5 – 6 weeks | 3 – 5 weeks (sea) 5 – 7 days (air) |
| Custom / Multi-Unit Fleet depots, microgrids | Fully custom configuration | 10 – 14 weeks | Contact us | Project-specific |
Everything Integrated in One Box
Each GOHO prefabricated substation is a complete power distribution system, fully assembled, wired, and tested in our factory before it reaches your site.
Power Flow: From MV Grid to EV Chargers
MV Switchgear
Ring Main Unit (RMU) or vacuum circuit breaker (VCB) for medium voltage incoming and protection. 6-35kV options available.
Distribution Transformer
Oil-immersed or dry-type transformer from 50-2500kVA. High efficiency, low loss, and suitable for frequent load cycling.
LV Distribution
Low voltage switchgear with ACB/MCCB for charger feeder circuits. Configurable for 4-32+ charging outlets.
Power Factor Correction
Automatic PFC system with harmonic filter to maintain grid power quality and avoid utility penalty charges.
Harmonic Filter
Active or passive harmonic filtering to mitigate THD from fast DC chargers and comply with IEEE 519 / IEC 61000.
Metering & Protection
Smart energy metering, protection relays, surge arresters, and earth fault protection for comprehensive system safety.
SCADA & Remote Monitoring
Optional SCADA system with remote monitoring, alarm notification, and data logging for operational visibility.
HVAC & Ventilation
Natural or forced air cooling, optional climate control for extreme temperature environments, and IP-rated enclosure.
Fire Safety System
Transformer oil containment, smoke detection, and optional fire suppression system per local safety standards.
Built for Charging Network Operators
Designed from the ground up to address the unique challenges of EV charging infrastructure deployment — speed, cost, scalability, and reliability.
Fast Grid Connection
Weeks not months. Factory assembly parallel paths with site civil works, dramatically compressing your project timeline and time-to-revenue.
Lower Civil Works Cost
Minimal foundation and civil works required. A simple concrete pad is all you need — no building construction, no complex electrical room build-out.
Easy Expansion
Modular design makes it simple to add capacity as your charging network grows. Add units or upgrade components without full site rebuild.
Plug-and-Play Deployment
Arrive on site pre-wired and pre-tested. Connect MV cable, LV feeders, and ground — then energize. Minimal on-site labor and coordination.
Remote Monitoring
Built-in SCADA and IoT connectivity let you monitor power quality, energy consumption, and equipment status from your operations center.
Proven Reliability
Factory testing under IEC standards ensures every component works together. Reduced site variables mean fewer commissioning issues.
Where Prefab Substations Excel
From highway rest stops to urban charging hubs, GOHO prefabricated substations power every type of EV charging deployment.
Highway Rest Stops
Urban Charging Hubs
Fleet Depots
Temporary Event Charging
Solar + Storage + Charging Microgrids
Real-World Deployments
See how GOHO prefabricated substations are powering EV charging infrastructure across diverse applications and environments.
Highway Fast Charging Hub
1250kVA European type prefab substation powering 10 DC fast chargers at a major highway rest area.
City Center Charging Plaza
500kVA American pad-mounted substation with compact footprint for a dense urban charging location.
Electric Bus Fleet Depot
Dual 2000kVA prefab substations with SCADA powering 50+ electric buses at a municipal transit depot.
Solar + Storage Charging Microgrid
Custom 1000kVA prefab substation integrated with solar PV, battery storage, and DC fast chargers.
1 MW Highway Charging Hub Deployment
See how a major European charging operator cut deployment time by 65% and reduced total cost by 38% using GOHO prefabricated substations.
Highway Rest Area Charging Hub — 1250kVA European Type
10 x 120kW DC Fast Chargers | 1 MW Total Capacity | Deployed in 2025
Installation Timeline Comparison: Prefabricated vs. Site-Built
Site Preparation
Equipment Delivery
Installation
Testing / Commissioning
Go-Live
Civil Works Cost Breakdown: Prefabricated vs. Site-Built
| Civil Works Item | Site-Built Substation | GOHO Prefabricated | Savings |
|---|---|---|---|
| Building / Enclosure Construction | $65,000 – $90,000 | $0 (integrated) | 100% |
| Concrete Foundation / Pad | $25,000 – $35,000 | $8,000 – $12,000 | ~65% |
| Cable Trench & Ducting | $15,000 – $22,000 | $6,000 – $9,000 | ~60% |
| HVAC & Ventilation System | $12,000 – $18,000 | $0 (integrated) | 100% |
| Lighting & Fire Safety | $8,000 – $12,000 | $2,000 – $3,000 | ~75% |
| Site Grading & Drainage | $10,000 – $15,000 | $5,000 – $8,000 | ~50% |
| TOTAL CIVIL WORKS | $135,000 – $192,000 | $21,000 – $32,000 | 75-85% Less |
Total Cost Comparison: Prefabricated vs. Site-Built
| Cost Category | Site-Built Substation | GOHO Prefabricated | Savings |
|---|---|---|---|
| Equipment Cost | $185,000 | $160,000 | 13.5% |
| Civil Works & Building | $120,000 | $35,000 | 70.8% |
| Installation Labor | $85,000 | $28,000 | 67.1% |
| Project Management | $45,000 | $18,000 | 60.0% |
| Commissioning & Testing | $35,000 | $15,000 | 57.1% |
| TOTAL | $470,000 | $256,000 | 45.5% |
Quick Specification Comparison
Compare key technical parameters between our European and American type prefabricated substations for EV charging applications.
| Parameter | European Type (YBW Series) | American Type (ZGS Series) |
|---|---|---|
| Rated Capacity | 50 – 2500 kVA | 50 – 1600 kVA |
| MV Voltage Level | 6 kV, 10 kV, 20 kV, 35 kV | 10 kV, 15 kV, 25 kV, 35 kV |
| LV Voltage Level | 400V / 480V, 3-phase | 400V / 480V, 3-phase |
| MV Switchgear Type | HXGN15-12 RMU / KYN28 VCB | Pad-mounted load break switch |
| LV Switchgear Type | GGD / GCK / MNS series | LV breaker compartment |
| Transformer Type | Oil-immersed or dry-type | Oil-immersed (pad-mounted) |
| Enclosure Rating | IP3X – IP54 | IP65 / NEMA 3R |
| Cooling Method | Natural / forced air ventilation | Oil natural / air natural (ONAN) |
| Protection Class | IEC 60076, IEC 62271 | ANSI C57.12.28, IEC 60076 |
| Dimensions (L×W×H) — 1250kVA | ~5.5 × 2.2 × 2.8 m | ~3.0 × 2.0 × 2.4 m |
| Approx. Weight — 1250kVA | ~8,500 kg | ~6,000 kg |
| Optional SCADA / Remote Monitoring | Yes | Yes (compact version) |
Your Trusted Partner in Power Distribution
With over 15 years of experience designing and manufacturing prefabricated substations, GOHO is the partner charging operators trust for reliable, cost-effective power infrastructure.
15+ Years Experience
Decades of expertise in prefabricated substation design and manufacturing, with thousands of units deployed globally.
IEC Certified
Full compliance with IEC 62271, IEC 60076, and other international standards. Type-tested and third-party verified.
30+ Countries Served
Global footprint across Asia, Middle East, Africa, Europe, and Americas. Proven in diverse climates and grid conditions.
Custom Design Capability
Full in-house engineering team to customize every aspect — from capacity to smart grid integration and aesthetics.
Frequently Asked Questions
Answers to common questions about prefabricated substations for EV charging applications.
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Typical on-site installation takes 2-4 weeks from delivery to energization, depending on site complexity and utility connection requirements. The total project timeline from order to go-live is typically 8-14 weeks, including factory production (4-8 weeks) and site preparation (which can run in parallel with manufacturing). This is significantly faster than conventional site-built substations, which typically take 16-24 weeks for the same scope.
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The required size depends on the number and type of chargers, their power rating, and the expected simultaneous utilization (diversity factor). As a rough guide: 4-8 chargers (30-60kW) need ~315-630kVA; 8-16 DC fast chargers (60-120kW) need ~1000-1250kVA; and large hubs with 16+ chargers may need 2000-2500kVA or multiple units. Our engineering team provides free custom sizing based on your specific charger mix and site conditions.
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Yes. Our EV charging-optimized prefabricated substations include integrated active or passive harmonic filtering to manage total harmonic distortion (THD) from fast DC chargers. We design systems to meet IEEE 519 and IEC 61000-3 standards, ensuring no adverse impact on the utility grid or nearby equipment. Each solution includes power factor correction and harmonic analysis as part of the design process.
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GOHO prefabricated substations are designed for a minimum service life of 25-30 years with proper maintenance. The enclosure is constructed from corrosion-resistant materials with protective coatings suitable for outdoor installation. Major components like transformers typically have 25-30 year lifespans, while switchgear and protective relays have 15-20 year service intervals. We offer comprehensive maintenance and upgrade packages to extend service life and adapt to evolving charging technology.
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Yes. Modularity is one of the key advantages of prefabricated substations. Our designs support future expansion in several ways: you can upsize the transformer within the same enclosure (if initially undersized), add additional LV feeder circuits for new chargers, or parallel a second prefabricated unit for larger capacity increases. We recommend initially oversizing by 20-30% if you plan to expand within 3-5 years, to minimize future upgrade costs.
Get Your Free Prefab Substation Design & Quote
Tell us about your EV charging project and our engineering team will deliver a customized prefabricated substation design with a detailed cost estimate — free and no obligation.
Free custom sizing & design
Detailed cost breakdown
Delivery timeline estimate
Response within 48 hours
Learn More About EV Charging Infrastructure
Explore our technical guides and articles to make informed decisions about your charging station power infrastructure.
EV Charging Station Electrical Infrastructure: A Complete Guide
Everything you need to know about powering EV charging stations — from grid connection to LV distribution design.
How to Size a Transformer for EV Charging Stations
Learn the methodology behind transformer sizing for DC fast charging, including diversity factors and harmonic considerations.
Prefabricated vs. Site-Built Substations: EV Charging Cost Comparison
Detailed cost breakdown comparing prefabricated and conventional substation approaches for EV charging deployments.
Ready to power up your charging network?
Get a free project design and quote from GOHO’s EV charging experts.