Smart city

Pumpkin offers eco-friendly solutions in EV charging systems for the upcoming future.


By developing renewable energy, Pumpkin offers a sustainable way of EV charging.

A Smart EV Charging Infrastructure for a Smart City

  • Charging infrastructure for EVs, PMs and autonomous driving vehicles
  • V2G(Vehicle-to-Grid) technology enables transferring remaining energy to the infrastructure
  • Utilizing solar generators and ESS(Energy Storage System)
  • Reducing energy usage by operating smart grid and data analysis, Participating in Demand-Response partnerships

V2G chargers, DR energy management system

Solar energy generation and storage system

  • Solar energy generation and storage system for small usages
  • ESS(Energy Storage System) stores electricity at night time, reducing energy usage and costs.
  • Reducing energy usage increases income from Demand-Response partnerships
  • Charging system in MOU with Hyundai’s ELEC-CITY

Solar Energy Generation

Converting DC electricity from solar modules into AC electricity, Then providing the electricity directly to users(or KEPCO).

Solar generation

Fuse box

PV Inverter
(to AC)

(or KEPCO)

Management system


Energy Storage System
Stores energy from solar generation for further uses

Solar generation

Controller Panel

PV Inverter
(to AC)


Management system

Solar Energy Generation System in Suwon Public Bus Garage

An Eco-Friendly Infrastructure

  • Building EV infrastructure in joint with Hyundai and Solco Pyroelec
  • In development of an efficient, eco-friendly charging system



Battery-swapping stations(BSS) for scooters and bikes


Charging system infrastructure for electric buses


Charging system infrastructure for EVs

Demand-Response(DR) Business

  • Approved as a DR company in 2020, Pumpkin shares income from reduced energy usage with transportation companies.
  • Additional analysis on energy usage for maximized income from DR partnerships



20 DR companies acquire up to ₩900,000 each depending on the amount of the energy usage reduced each month.


  • Applying as a DR company(EV corporations) at Korea Power Exchange(KPX)

Identifying the client’s account in KPX’s ENTER
(reserved energy trading service)

  • Estimating the amount of energy savable based on the company’s account in KPX’s ENTER
    (between DR company and Pumpkin)

  • Establishing contract upon deciding the amount of energy to be saved

Installing monitoring device

  • Installing the monitoring device after applying for DR partnership
  • (DR company)Transmitting data to ENTER with an interval of 5 minutes

Registering demand-response resource

  • Taking the qualification test by Korea Power Exchange(KPX) to apply as demand-response partnership(both Pumpkin and DR-managing company)

Monthly payment

  • Progress in reducing the amount of contract reduction (demand management business & pumpkin) in the event of a reduction request from the power exchange
  • Monthly settlement & profit distribution of the Korea Power Exchange

Smart Meter(iDERMS RTU)


  • Data collection: inverter/meter, other sensors
  • Connections: ~15
  • Data transmission cycle: 1-15 minutes
  • Communication: Wired/wireless
  • Dimensions: 150 x 110 x 39(mm)

Smart Meter installation

Monitoring demand-response(DR)

  • Monitoring history of demanded power and reduction in power usage
  • Remote control of charger in connection with charger control system

Pumpkin, Smart Development for a Smart City.