Application · EV Fast Charging

EV Fast Charging Infrastructure

SiC-based chargers and solid-state transformer solutions for high-power charging — from 30 kW curbside units to megawatt charging hubs that do not break the grid.

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The Challenge

Fast Charging Is a Grid Problem as Much as a Charger Problem

A single 350 kW charger draws more power than 50 homes. Fleets and charging hubs at the megawatt scale are colliding with distribution networks sized for the last century.

Transformer bottlenecks: Hubs often require a dedicated MV connection and new transformer — costly and slow
Grid impact: High-power chargers cause voltage dips, harmonics and load spikes that utilities reject
Efficiency & heat: Charger losses become heat and electricity bills at high utilization
Scalability: Sites grow from 2 to 50 stalls — the architecture must scale without rework
Future megawatt charging: Commercial fleets and e-trucks need 1+ MW charging that LV grids cannot provide

Three Phase Power Conversion System for EV Charging

Our Solution

SST-to-Charger: Medium Voltage In, DC Out

An MV SST feeds the charging hub's DC bus directly from 10/20/35 kV — eliminating the transformer bottleneck and giving every stall clean, stable power.

High-Efficiency Charging

SiC-based chargers reach ≥96% efficiency — less heat, lower operating cost, better total cost per kWh delivered.

Direct MV to DC

SST input stages take MV directly to the hub DC bus — no dedicated MV transformer, no double conversion.

Grid-Friendly by Design

Low harmonics, high power factor and active load balancing — the features utilities demand in interconnection approval.

Load Management

OCPP-based smart charging distributes available power across stalls — serve more vehicles with the same connection.

Modular, Scalable Hubs

Add power modules and stalls as demand grows — from pilot stalls to full depot charging, without redesign.

Battery-Buffered Charging

On-site storage decouples charging peaks from the grid — charge the buffer overnight, charge vehicles all day.

Reference Capabilities

Charging Infrastructure Reference Specification

Parameter	Reference Range
Charger Power	AC 7–22 kW; DC from 30 kW to 350+ kW per stall
Charging Standards	CCS1 / CCS2, CHAdeMO, GB/T, Type 1/2 AC
Hub Scale	Single chargers to megawatt charging hubs / depot fleets
Input Options	0.4 kV LV; 10 / 20 / 35 kV via SST for hub scale
Efficiency	≥ 96% (SiC-based DC charging)
Management	OCPP 1.6 / 2.0, cloud platform, RFID / app / load management
Grid Impact	Low harmonic (IEC 61000 / IEEE 519), power factor > 0.99, active load balancing

Building Blocks

What We Supply for Charging Projects

DC Fast Chargers

SiC-based DC fast charging stations and modular power units, 30 kW and up.

View Chargers →

SST Input Stages

MV-to-DC solid-state transformer units that power the hub DC bus directly.

View Solution →

Storage + EMS

Battery buffering and cloud energy management to flatten demand and cut demand charges.

View Storage →

FAQ

Common Questions

When does a charging site need an SST instead of a transformer?

When site power exceeds what the LV grid can deliver — typically above ~1 MW, or when a dedicated MV connection is required. SST also makes sense where space is tight, where harmonics must stay minimal, or where you want battery-buffered, grid-friendly operation from day one.

Can we start small and expand later?

Yes. Modular power units and OCPP-based management mean you can deploy a few stalls on LV today and add SST-fed power modules as utilization grows — the management layer stays the same.

How do you handle utility interconnection approval?

We prepare the technical documentation utilities ask for — harmonic study, power factor, load profile and protection coordination — as part of the proposal package, so the approval process is shorter.