LONGi redefines Solar-Storage integration: launches Full-Stack ‘LONGi ONE’ BESS portfolio at Intersolar Europe 2026

MUNICH, Germany – June 25, 2026 – At Intersolar Europe 2026, the continent’s premier clean energy exhibition, LONGi Solar officially unveiled its revolutionary LONGi ONE full-stack battery energy storage system (BESS) portfolio. Moving beyond the industry's historical reliance on fragmented, multi-vendor components, LONGi is introducing a fully integrated, natively engineered solar-plus-storage architecture.

Overcoming the multi-vendor "accountability gap"

As rapid renewable energy deployment pushes global grid infrastructures to their limits, combining solar generation with energy storage has evolved from an optional configuration into an absolute operational necessity. Standalone solar assets increasingly face grid congestion, severe price cannibalization during peak production hours, and strict generation caps.

Historically, developers attempting to mitigate these issues have been forced to piece together hardware and software from separate suppliers. This disjointed approach creates systemic efficiency bottlenecks, complex delivery cycles, and a multi-vendor accountability nightmare when technical failures occur.

"The next phase of the global energy transition demands a total departure from fragmented systems," stated Dennis She, Vice President of LONGi, during an exclusive launch briefing at booth A2.170. "With LONGi ONE, we are fundamentally shifting the industry from a passive, piecemeal hardware model to a proactive, scenario-driven value engine. We deliver one coordinated system, managed by one intelligent platform, backed by one single point of operational responsibility."

Natively integrated, scenario-specific BESS portfolio

At the core of the LONGi ONE strategy is a deep engineering synergy that pairs LONGi’s industry-leading Back Contact (BC) PV module technology with its fully self-developed 5S energy storage system. Rather than forcing a one-size-fits-all framework, LONGi has engineered a full-stack portfolio tailored to distinct application scenarios:

·      For Utility-Scale megaprojects: the flagship OneBank 2.0 (an all-in-one AC/DC integrated system offering a robust nominal capacity of 6.25 to 6.9 MWh and the OneMatrix 2.0 turnkey solution. Equipped with pluggable string PCS units, this plant-level layout seamlessly adapts to 2-, 4-, or 8-hour configurations.

·      For Commercial & Industrial (C&I) Operations: the intelligent Hi-MO One Pro BESS solution, designed to maximize self-consumption and insulate businesses from electricity price volatility.

·      For off-grid & weak-grid infrastructure: the OneNexus microgrid solution, providing resilient power to remote regions.

·      Unified control layer: power conversion and autonomous dispatch are governed by OneSync PCS and OneOS, a cloud-edge, AI-driven intelligent energy management platform that acts as a Virtual Power Plant (VPP) by automatically analyzing market price signals and predicting weather patterns.

Unrivalled yield economics and "Ultimate Safety"

By controlling the entire hardware and software stack, LONGi ONE delivers tangible financial advantages that significantly optimize the Total Cost of Ownership (TCO).

The OneBank 2.0 and OneMatrix 2.0 systems achieve an industry-leading 93% system round-trip efficiency a full four percentage points higher than typical standalone architectures. Furthermore, advanced cluster-level management boosts lifetime energy output by up to 8%, driving a 2% to 4% increase in stakeholder ROI in high-cycle applications, while site deployment timelines are slashed by 20% to 30%.

Safety remains the uncompromisable anchor of LONGi's manufacturing philosophy. Built upon a flawless legacy track record of zero thermal runaways across 13 GW of cumulative global energy storage deployments, the new BESS portfolio sets a new benchmark for risk mitigation.

On the hardware side, the OneBank 2.0 boasts thickened rock wool insulation for extreme fire resistance. Digitally, LONGi’s patented iCCS (Intelligent Cell Connection System) leverages predictive AI to identify potential internal cell risks three to six months in advance, providing operators with a critical 15-minute early warning window to prevent failures entirely.

The 2830 Plan: direct localization and absolute accountability

Recognizing that a solar-plus-storage asset represents a 25-year operational relationship, LONGi is eliminating geographical barriers by expanding its global service infrastructure through the "2830 Plan".

Under this initiative, LONGi will establish 30 full-capability, localized service hubs known as Centers of Excellence (CoEs), across major international markets by the end of 2028.

Each Center of Excellence operates as a 360-degree engine under one roof, handling lifecycle project consulting, advanced system design, commissioning, asset optimization, and local spare parts management. Following the successful launch of its first European CoE in Madrid, Spain last March, LONGi is systematically duplicating this infrastructure across Europe to ensure that clients make one single local phone call for unified support, entirely removing the finger-pointing typical of multi-vendor projects.

"LONGi ONE is our definitive answer to the complexities of modern grid integration," concluded Dennis She. "By combining product leadership with a single boundary of lifecycle responsibility, we are ensuring our global partners unlock a far more predictable, higher return on investment for their green energy assets."

About LONGi

As a global leader in green energy technology, LONGi drives innovation across solar, energy storage, and hydrogen—three core pillars of a fully integrated clean energy system. We deliver safe, affordable, and sustainable energy solutions to customers worldwide. Committed to sustainable development, LONGi works to make clean energy accessible and affordable for all. By seamlessly connecting green power generation, energy storage, and hydrogen production, we enable end-to-end clean energy coverage—from generation and storage to consumption—building a truly inclusive and accessible clean energy ecosystem.

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