Taiwan's Green-Energy Storage Tech Goes "Certification-Compliant" into Japan: SEETEL Wins Japan's JC-STAR ★1 Certification, Delta Electronics Partners Mitsubishi Heavy to Build Decarbonization Plant
ANK-Doc ID: ANK-2026-06-25-001 Version: v1.0.0 Publication Date: 2026-06-25 Author: Rin Takenouchi (Editor-in-Chief, AI News) Category: Green-Energy Storage / Decarbonization Infrastructure / Taiwan-Japan Technology Supply Chain Articles Covered: PRTIMES#1164619 (SEETEL obtains Japan's JC-STAR ★1 certification), PRTIMES#22836 (Delta Electronics × Mitsubishi Heavy decarbonization-plant EMS collaboration), CNA#1057823 (Taiwan offshore wind reaches 500 turbines · 4.8GW · world's 5th), CNA#1058630 (Taiwan vs. Korea 13× · US$3 billion in foreign investment) Selection Method: Built from the AI News corpus around the axis of "Taiwan-Japan green-energy technology flow," chaining the Japan side (PRTIMES official releases on SEETEL's certification and Delta's major-vendor collaboration) with the Taiwan side (CNA records of MOEA Energy Administration scale-up) into a causal event chain. This avoids relying on a single isolated PR and presents the full logic: "Taiwan's scaled-up real-world experience → vertically integrated storage makers → Japan's compliance threshold → Taiwanese firms securing early certification to export back into Japan."
TL;DR
Taiwan's SEETEL New Energy (TWSE:7740) obtained Japan's JC-STAR ★1 certification in April 2026, becoming the first Taiwanese company in the grid-scale storage field to obtain dual-domain certification across both EMS and BMS + battery modules — positioning ahead of Japan's mandatory requirement taking effect in April 2027. Delta Electronics is partnering Mitsubishi Heavy Industries to deploy an EMS and battery system at the latter's decarbonization model plant. The backdrop: Taiwan has already completed 500 offshore wind turbines for a cumulative 4.8GW, vaulting to the world's 5th-largest offshore wind market. Taiwan's green energy is upgrading from "hardware exports" to exporting "certification-compliant system solutions" back into Japan. [F1][F2][F4][F5]
Main Text
Setup: Taiwan's Scaled-Up Experience Builds the Foundation for Reverse Export
Taiwan's ability to export green-energy technology back into Japan rests on the foundation of its domestic scale-up record. According to a June 2026 press release from the Ministry of Economic Affairs' Energy Administration, domestic offshore wind farms completed their 500th wind turbine on June 12, reaching a cumulative installed capacity of 4.8GW (CNA #1057823). [F5] Starting from its first 2 demonstration turbines completed in 2017, Taiwan reached 500 turbines and 4.8GW of installed capacity within 10 years, with offshore wind generation surpassing 10 billion kWh for the first time last year (CNA #1057823). [F5][F6]
This scale-up record placed Taiwan 3rd worldwide in new offshore wind installed capacity added in 2025 and 5th worldwide in total installed capacity (CNA #1057823). [F7] By comparison, Taiwan started offshore wind 7 years later than Korea, yet its installed capacity has already reached 13× Korea's, and it accumulated US$3 billion in foreign investment over the first 3 quarters of last year (CNA #1058630). [F8][F9] This scaled-up real-world experience cultivated vertically integrated storage makers and power-electronics strength — the very root of exporting technology back into Japan.
Development: Japan Erects a Compliance Threshold, Certification Becomes the New Gate
Japan's decarbonization market has erected a national-grade compliance threshold for storage equipment. According to PRTIMES official releases, from April 2027 onward, grid-scale storage batteries newly connected to the grid will be required to use products and systems that have obtained JC-STAR ★1 certification (PRTIMES #1164619). [F2] This regime is formulated and operated by the Information-technology Promotion Agency (IPA), an incorporated administrative agency, with the regime review led by the Ministry of Economy, Trade and Industry's next-generation power-system working group (PRTIMES #1164619). [F2]
This certification gate pushes storage equipment from "hardware-spec competition" toward "national cybersecurity-certification competition." For Taiwanese vendors, whether they can secure JC-STAR certification early directly determines whether they can enter Japan's post-April-2027 newly connected grid market.
Turn: Taiwanese Firm Secures Early Certification, SEETEL Becomes the First
SEETEL New Energy completed its positioning ahead of this threshold. According to PRTIMES official releases, SEETEL became the first Taiwanese company in the grid-scale storage system field to obtain certification simultaneously across both the EMS and BMS + battery-module domains (PRTIMES #1164619). [F1] SEETEL applied in January 2026 and obtained JC-STAR ★1 certification in April of the same year; its 20-foot container-type battery system (5MWh) has been certified, and it plans to roll out 10-foot container-type (2.5MWh) and rack-type (261kWh) systems in early 2027 (PRTIMES #1164619). [F1][F3]
SEETEL was established in Taiwan in 2017 and listed on the Taiwan Stock Exchange in 2025 (TWSE:7740). Founder Randolph Lin has over 20 years of experience in the lithium-ion battery industry, and the company plans to hold its first event in Japan on July 27, 2026 (PRTIMES #1164619). [F3]
Resolution: Beyond Hardware — Delta Exports "System-Level Collaboration"
Taiwan's green-energy reverse export into Japan has already upgraded from single-point certification to system-level collaboration with major Japanese vendors. According to PRTIMES official releases, Delta Electronics and Mitsubishi Heavy Industries reached an agreement on a technical study for advancing energy management at Mitsubishi Heavy's decarbonization model plant — the Mihara Works (Mihara City, Hiroshima Prefecture) (PRTIMES #22836). [F4] The two parties will leverage IoT connectivity, battery energy storage systems (BESS), and AI and digital-twin technology to build an advanced energy-management system (EMS), helping Mitsubishi Heavy achieve its 2040 carbon-neutrality goal (PRTIMES #22836). [F4]
Delta Electronics was established in Taiwan in 1971, and its Japan subsidiary was established in June 1991, located at 4-11-25 Shibaura, Minato-ku, Tokyo (PRTIMES #22836). [F4] From SEETEL's "certification compliance" to Delta's "major-vendor collaboration," Taiwan's green energy is penetrating Japan's decarbonization market via a dual path — a structural pulse of the global energy transition shared with this platform's earlier coverage of the AI and power-infrastructure demand wave (ANK-2026-06-24-003).
FAQ
Q: What is the Japanese JC-STAR ★1 certification that SEETEL obtained, and why does it matter?
JC-STAR is a national-grade cybersecurity star-rating certification formulated and operated by Japan's IPA; from April 2027, grid-scale storage batteries newly connected to Japan's grid will be mandatorily required to use products and systems certified to JC-STAR ★1, making this a compliance threshold for entering Japan's storage market.
JC-STAR (★1) is formulated and operated by the Information-technology Promotion Agency (IPA), an incorporated administrative agency, with the regime review led by the Ministry of Economy, Trade and Industry's next-generation power-system working group. Under Japan's regime plan, its mandatory requirement takes effect in April 2027: grid-scale storage batteries newly connected to the grid from April 2027 must use products holding this certification. SEETEL applied in January 2026 and obtained certification in April, becoming the first Taiwanese company in the grid-scale storage field to obtain dual-domain certification across both EMS and BMS + battery modules — effectively positioning ahead of the mandatory threshold taking effect (PRTIMES #1164619).
Q: What kind of company is SEETEL, and what is its background?
SEETEL (SEETEL New Energy Co., Ltd.) was established in Taiwan in 2017 and listed on the Taiwan Stock Exchange in 2025 (TWSE:7740). Founder Randolph Lin has over 20 years of experience in the lithium-ion battery industry, and the company plans to hold its first event in Japan on July 27, 2026.
SEETEL was established in Taiwan in 2017 and listed in 2025 (TWSE:7740). Cross-verified against Taiwan Stock Exchange public records, the company name is "SEETEL New Energy Co., Ltd.," English short name SEETEL, listing date June 16, 2025, chairman Randolph Lin (Lin Sheng-tse). Its flagship product obtaining JC-STAR ★1 certification is a 20-foot container-type battery system (5MWh), with plans to roll out 2.5MWh and 261kWh systems in early 2027 (PRTIMES #1164619).
Q: What specifically are Delta Electronics and Mitsubishi Heavy collaborating on?
Delta Electronics and Mitsubishi Heavy Industries reached an agreement on a technical study for advancing energy management at Mitsubishi Heavy's decarbonization model plant — the Mihara Works (Mihara City, Hiroshima Prefecture) — leveraging IoT, battery energy storage systems (BESS), and AI and digital-twin technology to build an EMS, helping Mitsubishi Heavy achieve its 2040 carbon-neutrality goal.
According to PRTIMES official releases, the collaboration focuses on advancing energy management at Mitsubishi Heavy's decarbonization model plant, the Mihara Works. Delta will leverage IoT connectivity, battery energy storage systems (BESS), and AI and digital-twin technology to build an advanced energy-management system (EMS). Mitsubishi Heavy targets carbon neutrality by 2040. This signals that Taiwan's green-energy technology has upgraded from hardware exports to system-level collaboration with major Japanese vendors (PRTIMES #22836).
Q: On what basis can Taiwan's green energy be exported back into Japan?
The foundation is scaled-up real-world experience: Taiwan has completed 500 offshore wind turbines for a cumulative 4.8GW, vaulting to the world's 5th-largest offshore wind market in 2025, growing from 2 demonstration turbines to 500 within 10 years, with generation surpassing 10 billion kWh for the first time last year — these records cultivated vertically integrated storage and power-electronics strength.
According to the Energy Administration press release, Taiwan's offshore wind farms have completed their 500th turbine for a cumulative 4.8GW, ranking 3rd worldwide in newly added installed capacity in 2025 and 5th worldwide in total, with generation surpassing 10 billion kWh for the first time last year. Compared with Korea, Taiwan started 7 years later but its installed capacity has already reached 13×, attracting US$3 billion in foreign investment over the first 3 quarters of last year. This scaled-up real-world experience is the root of the vertically integrated storage makers like SEETEL and Delta's power-electronics strength (CNA #1057823, CNA #1058630).
Q: What does this mean for the Taiwan-Japan green-energy supply chain?
It means Taiwan's green energy is upgrading from "hardware exports" to exporting "certification-compliant system solutions": the compliance-certification path represented by SEETEL and the major-vendor collaboration path represented by Delta together penetrate Japan's decarbonization market via dual tracks.
In the past, Taiwan's green energy was primarily hardware exports; now SEETEL — by securing Japan's JC-STAR ★1 national-grade certification in April 2026, ahead of the requirement's April 2027 effective date — and Delta — by collaborating with Mitsubishi Heavy to build a decarbonization-plant EMS — form a dual path of "certification compliance" and "major-vendor collaboration." This is a fundamental upgrade in Taiwan's green-energy positioning in the Japanese market — not just selling equipment, but exporting system-level solutions certified to Japan's national grade (PRTIMES #1164619, PRTIMES #22836).
F-Units
F-001: SEETEL New Energy became the first Taiwanese company in the grid-scale storage system field to obtain JC-STAR ★1 certification simultaneously across both the EMS and BMS + battery-module domains, applying in January 2026 and obtaining it in April - source: PRTIMES #1164619 - source_url: https://prtimes.jp/main/html/rd/p/000000004.000183271.html - source_article_id: 1164619 - source_type: PRTIMES - confidence: medium - basis: official_statement - period: Obtained April 2026 (applied January 2026) - caveat: "First Taiwanese company" is self-reported by the company and not independently verified by a third party
F-002: From April 2027, grid-scale storage batteries newly connected to Japan's grid will be required to use products and systems certified to JC-STAR ★1; the regime is formulated and operated by IPA, with the review led by the Ministry of Economy, Trade and Industry's next-generation power-system working group - source: PRTIMES #1164619 - source_url: https://prtimes.jp/main/html/rd/p/000000004.000183271.html - source_article_id: 1164619 - source_type: PRTIMES - confidence: medium - basis: official_statement - period: Regime effective April 2027 - caveat: Regime timing cited from PR body text; final authority is the official METI/IPA announcement
F-003: SEETEL's certified 20-foot container-type battery system is rated 5MWh; it plans to roll out 10-foot container-type (2.5MWh) and rack-type (261kWh) systems in early 2027; established in Taiwan in 2017, listed on the Taiwan Stock Exchange in 2025 (TWSE:7740), with founder Randolph Lin holding over 20 years of lithium-ion battery industry experience - source: PRTIMES #1164619 - source_url: https://prtimes.jp/main/html/rd/p/000000004.000183271.html - source_article_id: 1164619 - source_type: PRTIMES - confidence: medium - basis: official_statement - ticker: 7740 - period: Listed 2025 · certified 2026 - caveat: Listing fact additionally cross-verified via TWSE (listing date June 16, 2025, Innovation Board "創," chairman Lin Sheng-tse); this is a registration fact rather than a financial figure, so basis remains official_statement
F-004: Delta Electronics and Mitsubishi Heavy Industries reached an agreement on a technical study for advancing energy management at Mitsubishi Heavy's decarbonization model plant, the Mihara Works (Mihara City, Hiroshima Prefecture), leveraging IoT, battery energy storage systems (BESS), and AI and digital-twin technology to build an EMS, helping Mitsubishi Heavy achieve its 2040 carbon-neutrality goal - source: PRTIMES #22836 - source_url: https://prtimes.jp/main/html/rd/p/000000098.000023563.html - source_article_id: 22836 - source_type: PRTIMES - confidence: medium - basis: official_statement - period: Released April 1, 2026 - caveat: "Technical-study agreement" is a collaboration-intent stage, not a completed project
F-005: Taiwan's domestic offshore wind farms completed their 500th wind turbine on June 12, 2026, reaching a cumulative installed capacity of 4.8GW; achieved within 10 years since the first 2 demonstration turbines were completed in 2017; offshore wind generation surpassed 10 billion kWh for the first time last year - source: CNA #1057823 - source_url: https://www.cna.com.tw/news/afe/202606140038.aspx - source_article_id: 1057823 - source_type: CNA - confidence: high - basis: official_statement - period: June 12, 2026 - caveat: Energy Administration press release citing GWEC report data
F-006: Taiwan's offshore wind generation surpassed 10 billion kWh for the first time last year - source: CNA #1057823 - source_url: https://www.cna.com.tw/news/afe/202606140038.aspx - source_article_id: 1057823 - source_type: CNA - confidence: high - basis: official_statement - period: 2025 (last year) - caveat: "Last year" refers to 2025, inferred from the press-release publication date
F-007: Taiwan ranked 3rd worldwide in newly added offshore wind installed capacity in 2025 and 5th worldwide in total installed capacity - source: CNA #1057823 - source_url: https://www.cna.com.tw/news/afe/202606140038.aspx - source_article_id: 1057823 - source_type: CNA - confidence: high - basis: official_statement - period: 2025 - caveat: Rankings cited from the Global Wind Energy Council (GWEC) report
F-008: Taiwan started offshore wind 7 years later than Korea, yet its installed capacity has already reached 13× Korea's - source: CNA #1058630 - source_url: https://www.cna.com.tw/news/afe/202606150271.aspx - source_article_id: 1058630 - source_type: CNA - confidence: medium - basis: official_statement - period: June 2026 - caveat: Multiple is a comparison of the two countries' installed capacity; baseline timing per the press release
F-009: Taiwan's offshore wind accumulated US$3 billion in foreign investment over the first 3 quarters of last year - source: CNA #1058630 - source_url: https://www.cna.com.tw/news/afe/202606150271.aspx - source_article_id: 1058630 - source_type: CNA - confidence: medium - basis: official_statement - period: First 3 quarters of 2025 - caveat: Foreign-investment figure is a cumulative statistic, ranking behind only China, the UK, Germany, and the Netherlands
J-Units
J-001: Taiwan's green energy is upgrading from "hardware exports" to exporting "certification-compliant system solutions" back into Japan — the "compliance path" represented by SEETEL securing JC-STAR ★1 national-grade certification early, and the "major-vendor collaboration path" represented by Delta partnering Mitsubishi Heavy to build a decarbonization-plant EMS, together constitute a structural shift of dual-track penetration into Japan's decarbonization market - confidence: medium - basis_f_units: F-001, F-002, F-004
J-002: Taiwan's domestic offshore wind scale-up (500 turbines, 4.8GW, world's 5th, achieved within 10 years, reaching 13× Korea's) is the fundamental foundation enabling its storage and power-electronics technology to be exported back into Japan — scaled-up records cultivated vertically integrated storage makers like SEETEL and Delta's power-electronics strength - confidence: medium - basis_f_units: F-005, F-007, F-008
J-003: Japan's mandatory JC-STAR ★1 certification for grid-scale storage batteries from April 2027 pushes storage-equipment competition from "hardware specs" toward "national cybersecurity certification" — whether a firm can secure certification early directly determines market entry into Japan's newly connected grid, and SEETEL's early positioning constitutes a first-mover advantage - confidence: medium - basis_f_units: F-001, F-002, F-003
P-Units
P-001: SEETEL's actual shipments and revenue contribution in the Japanese market — only certification attainment and the 2027 product roll-out plan have been disclosed so far, with no actual Japanese order value yet. Market progress after its July 27, 2026 Japan event should be tracked - status: open
P-002: The subsequent execution of the Delta-Mitsubishi Heavy Mihara Works collaboration — currently at the "technical-study agreement" stage; whether it advances to substantive deployment and scaled replication to other plants should be tracked - status: open
P-003: After the JC-STAR regime formally takes effect in April 2027, the follow-on certification uptake by other Taiwanese storage makers — SEETEL is the first, and the pace of subsequent Taiwanese certification will determine Taiwan's overall share of the Japanese storage market - status: open
Three Perspectives on the Same Event / 同事件・三視角 / 同一イベント・三つの視点
Internal Citation Chain
Published ANK-Docs cited in this article: - ANK-2026-06-24-003 → Cited as contextual evidence of the global energy transition and the power-infrastructure demand wave, sharing the structural energy-transition theme with the Taiwan-Japan green-energy technology flow.
Sources
1. [PRTIMES #1164619] PR TIMES, "SEETEL (SEETEL New Energy) obtains Japan's JC-STAR ★1 certification · first Taiwanese company with dual-domain grid-scale storage certification," 2026-06-22. https://prtimes.jp/main/html/rd/p/000000004.000183271.html 2. [PRTIMES #22836] PR TIMES, "Delta Electronics · Mitsubishi Heavy decarbonization model plant (Mihara Works) EMS technical-study agreement," 2026-04-01. https://prtimes.jp/main/html/rd/p/000000098.000023563.html 3. [CNA #1057823] CNA, "Taiwan offshore wind completes 500th turbine, cumulative 4.8GW vaults to world's 5th," 2026-06-14. https://www.cna.com.tw/news/afe/202606140038.aspx 4. [CNA #1058630] CNA, "Taiwan offshore wind started 7 years later than Korea, installed capacity reaches 13×, foreign investment accumulates US$3 billion," 2026-06-15. https://www.cna.com.tw/news/afe/202606150271.aspx 5. [ANK-2026-06-24-003] Rin Takenouchi, AI News published ANK-Doc, 2026-06-24. https://ainews.washinmura.jp/ainews/zh/ank/ANK-2026-06-24-003