2026-01-05
Moderntec, a specialized EV charger manufacturer (CEO: Sung-doo Kim), has begun a full-scale push into the market with a variable power bank system targeting charging point operators (CPOs).
By maximizing power efficiency and preparing for future V2G (Vehicle-to-Grid) power trading, the company aims to secure an early lead in the private charging infrastructure market.
Moderntec announced on the 22nd that it has completed the commercialization of its variable power bank charging system.
The core feature of the system is a modular structure that allows charging capacity to be freely adjusted according to demand. A basic 400 kW power bank can be expanded by adding up to two 200 kW power cabinets, enabling a maximum output configuration of 800 kW.
At high-demand charging hubs, additional cabinets can be installed to increase capacity, while at low-utilization sites, cabinets can be removed to reduce operating costs. The system also minimizes power loss and standby power consumption, maximizing charging efficiency—an aspect that has been positively received by CPOs.
At a time when charging station profitability is a key issue, the ability to reduce both initial investment and operating costs is seen as a major competitive advantage.
Since developing Korea’s first 50 kW fast charger in 2009, Moderntec has continuously advanced next-generation power infrastructure technologies, including renewable energy- and ESS-linked chargers, V2G chargers, and unmanned robotic charging systems. Leveraging its experience as the first company in Korea to commercialize distributed chargers, Moderntec developed the new power bank system.
The technology is currently being supplied to the Korea Expressway Corporation, with plans to expand its application to large-capacity commercial chargers for electric buses, logistics centers, and vehicle depots.
In addition, Moderntec has applied an intelligent “charging transition system” across all models, which automatically switches from fast charging to slow charging once a certain charge level is reached. This technology overcomes the conventional limitation of fast charging being capped at 80%.
Using a single connector, fast charging, slow charging, and discharging are all possible, making the system highly applicable to the future V2G power trading market.
Although the government is separately promoting V2G demonstration projects, concerns have been raised that the fast chargers distributed by the Ministry of Climate, Energy and Environment do not consider V2G functionality at all.
Currently, government-supplied fast chargers are designed to support only DC charging. However, the charging port itself (DC Combo 1) can technically include AC functionality. If this capability were activated, both fast charging and V2G discharging could be handled at the same location.
V2G is a technology that connects EV batteries to the power grid, enabling charging and discharging to manage peak demand. Vehicles can be charged during off-peak hours when electricity prices are low and discharged during peak hours to generate revenue, or they can supply stored power to stabilize the grid during periods of high demand.
However, since V2G is currently being pursued through the installation of dedicated V2G chargers, drivers would need to move their vehicles to a separate location after DC fast charging to participate in V2G, causing significant inconvenience.
Industry experts argue that, given the difficulty of securing charging station sites, enabling AC port usage and incorporating V2G functionality from the outset would allow immediate utilization without additional infrastructure. If fast charging, slow charging, and discharging can all be performed through a single connector, future V2G services could be rapidly deployed through software updates or minor upgrades.
CEO Sung-doo Kim of Moderntec stated,
“The Ministry says it will establish a V2G roadmap by May, but the public fast chargers distributed by the same ministry completely lack V2G functionality. If we are serious about promoting V2G, we must resolve the contradiction of building infrastructure separately.”