Space‑Grade CIGS Solar Cells Get US Lab Boost

Idemitsu launches the first U.S. lab for space‑grade CIGS panels

Idemitsu Kosan has opened a dedicated development laboratory at UC Santa Barbara’s OASIS facility, marking the first U.S. lab focused on copper‑indium‑gallium‑selenide (CIGS) solar cells built for space. The lab will prototype, test and validate thin‑film modules that can survive harsh radiation while staying ultra‑light, a combination Idemitsu says is essential for next‑generation satellites.

The company’s statement explains that insights from the U.S. market will be fed back to its R&D centre in Japan, accelerating the path to mass‑production by 2027. A parallel bench‑manufacturing plant is already under construction in Japan, and Idemitsu is evaluating a full‑scale factory once the technology matures.

Why CIGS matters for space power

CIGS thin‑film cells offer three key advantages over traditional silicon panels used on spacecraft: high radiation resistance, a lightweight profile, and sustained efficiency under extreme temperature swings. In 2019 Solar Frontier – Idemitsu’s majority‑owned CIS module maker – set a record 23.35 % cell efficiency on a 1 cm² sample, a benchmark that still stands today. Those performance attributes translate into smaller solar arrays that can generate the same power as larger silicon decks, reducing launch mass and cost.

Industry analysts note that the satellite market is shifting toward high‑throughput constellations, where every kilogram saved can enable additional payloads or longer mission lifetimes. According to a report from SpaceNews, demand for radiation‑hard, lightweight panels is expected to grow strongly as low‑Earth‑orbit constellations expand.

Commercial timeline and mass‑production roadmap

Idemitsu plans rapid prototyping in the U.S. lab and aims to qualify space‑grade CIGS modules for flight in the near term. The bench plant in Japan, slated to start limited production in 2027, will focus on scaling the proprietary thin‑film process. If market conditions are favourable, a full‑scale factory could follow within a few years, according to PV‑Tech.

The company also announced a collaboration with Source Energy Company to co‑develop satellite‑grade modules, leveraging Source’s experience in aerospace‑qualified power electronics.

What it means for Israel’s solar and space sectors

Israel’s burgeoning satellite industry – highlighted by the recent launch of its first domestically built communications satellite – stands to benefit from lighter, more efficient power sources. While specific weight savings will depend on system design, the use of CIGS modules could free up valuable launch capacity for additional payloads.

For Israeli ground‑based solar adopters, the technology’s high radiation tolerance also hints at longer‑lasting rooftop panels in sunny regions. Using the verified Israeli figures (residential tariff ≈ ₪0.48 /kWh, install cost ≈ ₪3,150 /kWp), a 10 kWp home system in central Israel would generate ~17,000 kWh/year, worth ~₪8,160 annually, and pay back in about 3.9 years. If CIGS panels eventually achieve comparable costs to silicon while offering higher degradation resistance, the payback period could shrink further – a tangible benefit for homeowners and commercial investors alike.

Outlook: from orbit to rooftops

Idemitsu’s U.S. lab signals a strategic push to bring space‑grade thin‑film technology into commercial reality within the next few years. Success would not only supply the fast‑growing satellite market but could also trickle down to terrestrial solar, offering lighter, more durable modules for rooftop installations across Israel’s sunny climate.

The company’s roadmap – prototype validation in the near term, bench‑plant operation by 2027, and potential full‑scale mass production thereafter – aligns with global trends toward higher‑efficiency, lower‑weight photovoltaics. As the technology matures, Israeli engineers, investors and policymakers should watch for opportunities to integrate CIGS panels into both space missions and the nation’s ambitious renewable‑energy targets (30 % by 2030).