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HUA-X battery project reference / Noto Peninsula, Ishikawa, Japan

Portable Storage Supports Temporary Housing on the Noto Peninsula

A Noto Peninsula relief project supplied 120 portable power units with folding solar panels to households in temporary accommodation, prioritising older residents and families with infants.

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A portable power station on a low table in a temporary Japanese home.
Illustrative project scene.

Additional power during recovery

Following the 2024 Noto Peninsula earthquake, a local social-welfare organisation procured portable storage for temporary housing where electricity supply was unreliable. The project prioritised households with older residents and infants.

The deployment supplied 120 units rated at 2 kWh and 2,000 W, paired with 400 W folding solar panels. The portable format allowed households to position the equipment near the loads they needed to support.

A defined set of household loads

The 18 kg unit could supply a 500 W electric heater for 3.5 hours in the project's operating example. Other uses included refrigeration, lighting and phone charging, with the duration depending on which appliances were operating.

At −2°C, the project's discharge assessment retained 89% of reference capacity. The battery-management arrangement limited charging below 0°C and resumed normal charging after the temperature rose.

Procurement and delivery model

The portable units were priced at US$620 each. The combined purchase of 120 units and solar panels totalled US$84,000, funded equally through corporate donations and local-government support.

The deployment used a distributed approach to emergency power. Each household received a manageable source for selected needs, while solar input provided another way to replenish the battery when suitable conditions were available.

Project FAQ

Questions about this project reference

Configuration, application and operating conditions for this project.

Could every household run a heater and other appliances for 3.5 hours?
The 3.5-hour example concerned a 500 W heater. Adding a refrigerator, lighting or other loads changes the total energy demand and shortens the available duration. The 2,000 W output rating is a power limit; it does not mean the 2 kWh unit can sustain 2,000 W for the same period.
Did the 400 W panel guarantee a full recharge each day?
No. The panel rating does not specify daily energy yield. Sunlight, shading, orientation and charging conditions determine how much energy reaches the battery. The deployment used solar as an additional replenishment route while households prioritised selected loads.
How did the unit handle cold-weather use?
The project measured 89% of reference discharge capacity at −2°C and used a battery-management arrangement that limited charging below 0°C. Discharge capability and charging permission were therefore different conditions. The equipment needed a suitable charging environment even when it could still supply household loads.

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