Koshin plans to release its new “Hybrid Power Storage System” Feb. 24, 2026, to counter power outages. The system combines a portable power station (BPS-24LD) and an inverter generator (GV-18iSD). Simply connecting the two with a dedicated cable enables the system to automatically cycle between generating and storing electricity.
Unlike a standalone portable power station, which becomes unusable once its battery runs out, or a standalone generator, which is difficult to use at night or in residential areas due to its outdoor nature, this hybrid system can store electricity generated by the generator in the portable power station. This enables quiet indoor use as needed. When the portable power source’s charge falls below a certain level, the generator automatically starts and shuts off once the unit is fully charged. This feature provides a long-term power supply without the need for cumbersome operation and supports household appliances such as refrigerators and heating equipment. The system also features a CO sensor and a safety function that automatically stops the generator during improper use. This system is expected to enhance household peace of mind in preparation for prolonged power outages caused by an increase in natural disasters in Japan.
Source: KOSHIN Read The Article
PSR Analysis: First, I am struck by Koshin’s sharp perspective on “practical power outage countermeasures.” The company deserves credit for integrating these solutions through “automatic coordination” rather than “selective use.” Portable power stations are quiet and suitable for indoor use, but they have limited capacity. Inverter generators have an extended runtime, but they are noisy and produce exhaust.
Noteworthy is the mechanism that automatically starts the generator when power reserves are low and shuts it down once charging is complete. This design significantly reduces the psychological and operational burdens during disasters. Furthermore, the inclusion of a CO sensor demonstrates the company’s expertise as a generator manufacturer and its commitment to safety.
In discussions where renewable energy and large-scale batteries are often presented as ideal solutions, Koshin’s philosophy of supplying reliable power as long as fuel is available is extremely practical, especially considering Japan’s disaster characteristics.
Although challenges like pricing and fuel management remain, I believe this is a highly refined solution to the problem of how to survive power outages lasting several days to a week. Although explosive sales growth isn’t expected, there is undoubtedly a demand for such products. PSR
Akihiro Komuro is Research Analyst, Far East and Southeast Asia, for Power Systems Research
