A bidirectional charger is an advanced charging device that allows the battery of an electric vehicle to not only receive energy from the grid for charging, but also output the power stored in the battery in reverse to support the grid, power homes or businesses, or even power other devices.

Basic parameters of bidirectional charger products:

Rated power: 30kw/40kw

Rectification mode input voltage range: 260～485Vac

Rectification mode output voltage range: 150～750V

Max output current in rectification mode: 100A/80A

V2G DC input voltage range: 300～750V/200～750V

V2G DC input maximum current: 100A/80A

V2G AC output voltage range: 260V～485V/304V～485V

V2G output power: 30kw/40kw

V2L AC off-grid voltage: 380Vac/400Vac/415Vac

V2L AC off-grid frequency: 50/60Hz

Operating temperature: -25℃～+55℃

Noise control: ≤60dB

Protection level: ip54

I. Definition and function of bidirectional charger

Definition: A bidirectional charger is a device that can support bidirectional power transmission between electric vehicle batteries and the grid. It can receive power from the grid when the electric vehicle needs to be charged, and output the power in the electric vehicle battery in reverse when the grid needs it or the user needs it.

Function:

Vehicle to Grid (V2G): When the grid needs it, the power in the electric vehicle battery is output to the grid through a bidirectional charger to support the stable operation of the grid or relieve the pressure on the grid.

Vehicle to Home or Vehicle to Business (V2H/V2B): Use the power in the electric vehicle battery to power homes or businesses, especially during power outages or peak power demand periods, to provide emergency or supplementary power.

Vehicle to Vehicle (V2V): In some cases, a bidirectional charger can also support power transmission between electric vehicles to charge the batteries of other electric vehicles.

Vehicle to Equipment (V2E): Powering equipment such as construction site tools and power tools, similar to the function of gasoline generators, but more environmentally friendly and sustainable.

2. Working principle of bidirectional charger

When an electric vehicle needs to be charged, the bidirectional charger converts the alternating current (AC) provided by the power grid into direct current (DC) and inputs it into the battery of the electric vehicle.

When the power in the electric vehicle battery needs to be output, the bidirectional charger performs the reverse operation, converting the DC back into AC and outputting it to the power grid, home, business or other equipment.

3. Advantages of bidirectional charger

Improve energy efficiency: Through the V2G function, electric vehicle batteries can be charged during off-peak hours and output power to the power grid during peak hours, thereby balancing the load of the power grid and improving energy efficiency.

Reduce energy costs: Electric vehicle owners can earn points or reduce energy costs through V2G services, while also charging at lower rates during off-peak hours and feeding power back to the power grid at higher prices during peak hours.

Enhance grid stability: When the power grid fails or is under pressure, electric vehicle batteries can be used as distributed energy storage systems to provide power support to the power grid, enhancing the stability and reliability of the power grid.

Promoting the development of renewable energy: Bidirectional chargers can be used in conjunction with solar photovoltaic systems to store excess solar power in electric vehicle batteries and output it to the grid or homes and businesses when needed, thereby promoting the use and development of renewable energy.

4. Bidirectional charger project case display

Q1: Are you trading company or manufacturer?

A: We are a professional electric car charger manufacturer and source factory.

Q2: what is the lead time?

A: Usually, 15-20 working days to produce.

Q3: Can we ask you to print our logo into chargers? Can the color of the plug and wire be customized according to our requirements?

A: Yes. We support OEM/ODM production.

Q4: How about your product quality? What should I do if something goes wrong?

A: First of all, we sell our products for many years, and we have a professional engineering team in this field. Moreover, our products have been strictly inspected and repeatedly tested before leaving the factory, and the good and good rate of the varieties has reached 99.98%. Finally, we have service providers in some areas, please contact us for more information

Q5: What is your quality control system?

A: Complete all incoming material inspection, process inspection, and final inspection; 30 test procedures will be done before the goods leave the factory, and charging test videos will be sent; products have CE, ROHS, FCC, UL, KC certification.

Q6: Can I install the EV charger by myself?

A: Yes, but we suggest the user contact a professional electrician for installation to avoid potential safety hazards.

Q7：Why my charging power is lower than the specification?e?

A: Because during the charging session, a few factors will influence the output. Here is some potential reason:

①The BMS(Battery management system) of the car controls the charging session.

②The Max allowed current was set and limited through your APP.

For more details, please query us at sales@hjlcharger.com

Q8: How much time is required to fully charge my car using this charger?

A: The charging speed is determined by three factors working in conjunction: the On Board Charging (OBC) System, the maximum current allowed by the charging cable, and the EVSE. As an illustration, if the EV's maximum allowed power is 30KW and the battery capacity is 60KWh, it would take approximately 2 hours to charge the battery fully.

Q9: What is dynamic load balancing and why do I need that?

A: Dynamic load balancing is a technique that distributes the electrical load across multiple charging stations based on real-time demand. This helps prevent the electrical grid's overload and ensures that each charging station receives appropriate power.

Dynamic load balancing technology can help distribute the available power among multiple EV chargers in real-time, optimizing available power and reducing the risk of overloading the grid. This can help prevent power outages and reduce the need for costly grid upgrades.

Additionally, dynamic load Balancing can help reduce charging times and improve the overall charging experience for EV drivers, making it a valuable feature for both residential and commercial charging applications.