Solar Energy Storage Systems & LiFePO4 Battery Factory Partner - Why choose ONESUN' Build Local BESS Plants-OneSun

ONESUN is a Chinese solar energy storage system integrator established in 2014, specializing in the R&D and manufacturing of energy storage batteries and inverters. The company provides global customers with full-scenario solutions, including telecom base station batteries, all-in-one solar systems, residential and commercial & industrial photovoltaic energy storage systems (BESS), as well as PAYGO series solutions.

ONESUN launched its global strategy of building “300 localized solar energy storage factories,” aiming to partner with local companies in multiple countries to jointly establish manufacturing facilities. By assembling lithium battery packs and integrated solar storage systems locally, ONESUN seeks to deeply integrate into regional energy ecosystems.

Global Joint Factory Strategy

ONESUN plans to co-invest with overseas partners in the construction of lithium battery assembly plants and solar energy storage system factories. Leveraging its mature supply chain, technical standards, and production systems in China, combined with local partners’ market channels, policy resources, and networks, the company aims to create a dual-driven model of “technology + localization.”

Under this cooperation model, ONESUN, as the technology provider, offers R&D support, system design, core BMS and inverter technologies, as well as complete engineering drawings and production guidance. Meanwhile, local partners take the lead in customs clearance, factory approval, workforce management, and market expansion. This complementary partnership enables rapid market entry, reduced logistics and tariff costs, and access to government subsidies and priority project opportunities during policy windows.

Solar Battery Manufacturing Solutions

Photovoltaic Storage Policies and Energy Trends

In recent years, many countries have identified “solar + storage” as a key pillar of energy transition, promoting policies for green energy, distributed photovoltaics, and renewable energy consumption. For example, China has incorporated “new energy storage development” into its government agenda, making energy storage a mandatory component rather than optional for renewable energy projects, thus creating significant growth opportunities for integrated solar-storage systems.

Similarly, regions such as the EU, Southeast Asia, and Africa have introduced feed-in tariff subsidies, local manufacturing incentives, and tariff reductions to encourage the development of local solar energy storage factories, ensuring energy security and supply chain independence. In this context, ONESUN’s joint factory model allows partners to benefit from tax incentives and subsidies, while gaining higher priority in government tenders, large-scale C&I projects, and grid-side energy storage initiatives.

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ONESUN Products and LiFePO4 Technology

ONESUN’s product portfolio covers LiFePO4 (lithium iron phosphate) energy storage batteries ranging from 1kWh to 5MWh, as well as photovoltaic inverters from 250W to 125kW. With a strong foundation in military-grade power supply design and automotive-level safety standards, the products are suitable for telecom base stations, residential applications, commercial and industrial use, and microgrid systems.

The company’s all-in-one solar energy storage systems feature a fully integrated design, combining batteries, inverters, MPPT controllers, and energy management systems into a single cabinet. This simplifies installation and maintenance while supporting parallel operation and modular expansion, meeting energy needs from households to industrial parks.

In addition, ONESUN’s PAYGO (Pay-As-You-Go) series targets emerging markets by lowering entry barriers through installment payments and remote management, enabling wider adoption of off-grid solar and storage solutions.

ONESUN Global Agile Energy Storage Factory

Why Choose ONESUN as Your OEM/ODM Partner

As a leading global manufacturer of LiFePO4 batteries and energy storage systems, ONESUN offers strong OEM/ODM capabilities, providing customized branded batteries, storage cabinets, integrated solar systems, and complete solutions for B2B clients.

Its core team comes from top companies such as BYD, CATL, and military-grade power supply enterprises, bringing deep expertise in thermal management, BMS algorithms, system integration, and safety design to ensure long lifespan and high reliability.

For overseas partners, choosing ONESUN means gaining access to advanced technology, cost-effective solutions, policy advantages, and localized manufacturing capabilities—jointly building a sustainable local energy storage ecosystem in the global green energy transition.

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