Exploring Level 3 EV Chargers & DC EV Chargers

What are Level 3 EV Chargers & DC EV Chargers?

Level 3 EV Chargers and DC EV Chargers refer to the most powerful and fastest type of electric vehicle charging equipment available. These chargers provide direct current (DC) power to an EV’s battery pack, enabling incredibly quick recharge times compared to lower level AC charging. By bypassing the onboard AC-to-DC conversion, DC fast chargers can refill an EV’s battery to 80% in just 20-30 minutes using high voltage DC power up to 350kW.

Advantages of Level 3/DC Fast Charging

The primary advantage of Level 3 and DC fast charging is blazing speed. These chargers are designed to minimize downtime and enable long-distance EV travel by rapidly replenishing driving range in a short period. They are a necessity for public charging infrastructures along major transit routes and highways. DC fast charging is also very beneficial for commercial EV fleets that need to keep vehicles operational with minimal idle time.

Common Applications for Level 3/DC Chargers

While residential EV Home Chargers typically utilize Level 1 or 2 AC charging, DC fast chargers are intended for commercial and public use cases. Popular applications include:  DC Fast EV Chargers at gas stations/convenience stores, shopping malls, rest areas, fleet depots, workplace charging lots, and anywhere drivers need to quickly top up their battery on longer journeys.

Charging Power Levels of Level 3/DC Chargers

Level 3 DC chargers can deliver between 50-350kW of charging power. The most common configurations are 50kW, 120kW, 180kW, and 350kW. Higher power translates to even faster charging speeds, though charging rate also depends on the EV’s maximum acceptance rate. Many newer EVs can accept at least 150-250kW for ultra-rapid refueling in under 30 minutes.

Charging Connector Standards for DC Fast Charging

To enable DC fast charging, specialized charging inlets/plugs are used that can handle the high power DC current. The main DC fast charging standards are:

• CCS(Combined Charging System) used on EVs in North America and Europe
• CHAdeMOconnector used primarily on Japanese EVs like Nissan Leaf
• GB/TChinese standard used domestically in China
  

  

Key Considerations When Installing DC Fast Chargers

Some key factors to evaluate when deploying Level 3 or DC fast charging stations include the required electrical service size, space requirements, charging cable management, payment/access control systems, network connectivity, on-site energy storage/PV generation options, and local permits/regulations. Experienced EV Charger Manufacturers can help guide the planning process.

Benefits of Going DC for Charging Operators

As an EV Charging Station operator, providing DC fast charging can boost revenue and draw higher customer volume versus just Level 2 AC charging. You can command higher pricing due to the convenience while EV drivers benefit from much faster refueling times. Being an early adopter also lets you secure prime locations and capture market share.

Costs of Level 3 DC Fast Charging Equipment

While very capable, Level 3 DC chargers do come at a premium price point compared to Level 2. A single DC fast charger unit can range from $25,000 for lower power to over $100,000 for the highest 350kW versions. Installation, transformers, etc also add significant incremental costs. However, volume pricing from EV Charger Manufacturers can reduce the per-unit expense.

Planning & Operational Considerations

Beyond just the charging hardware, DC fast charging sites require robust planning across power distribution, energy management, billing systems, networking, maintenance, and more. Charging operators should carefully map out business models, pricing, and long-term area demand projections to maximize ROI on these more capital-intensive deployments.

FAQs on Level 3 & DC Fast Charging

What’s the difference between Level 3 and DC charging?

None – the terms refer to the same category of ultra-fast, DC-based EV charging equipment.

How long does it take to charge with a Level 3/DC charger?

Roughly 20-30 minutes to go from 20% to 80% battery on most modern EVs.

Do all EVs support DC fast charging?

No, only EVs with DC fast charge ports (CCS, CHAdeMO, GB/T, etc) can accept ultra-high rate DC charging.

What charging cable/connector standards are used?

The main DC fast charging inlet types used are CCS, CHAdeMO, and GB/T.

Do I need special equipment besides the charger itself?

Yes, high-power DC fast chargers require robust electrical service, transformers, power distribution equipment, energy management systems and more.