How Can Cambodia Develop Solar Energy Storage Projects? Why Choose ONESUN as Your B2B Energy Storage Partner?

Cambodia is entering an important stage of renewable energy development. With rising electricity demand from industrial parks, commercial buildings, agriculture and rapidly growing urban areas, solar energy + battery energy storage systems (BESS) can play a major role in improving energy reliability, reducing peak electricity costs and increasing renewable energy utilization.

The opportunity is becoming increasingly clear. In June 2026, the Asian Development Bank approved a US$63.44 million financing package supporting a 250MW/500MWh utility-scale battery energy storage project at Cambodia’s Takeo substation. The project is designed to store excess renewable electricity, release power during peak demand and strengthen grid stability.

Solar Battery Storage OEM & ODM Solutions

But Cambodia's energy storage market is not limited to large utility projects. Residential, commercial, industrial, telecom and off-grid applications can all create significant B2B opportunities.

How Can Cambodia Develop Solar Energy Storage Projects?

For Cambodian developers, EPC companies, solar distributors and energy investors, a practical strategy is to develop projects according to different electricity demand levels.

For the residential market, ONESUN can provide 5kWh, 10kWh, 15kWh and 20kWh Home Energy Storage Systems, suitable for homes requiring backup power, solar self-consumption and greater energy independence.

Solar Battery Storage OEM & ODM Solutions

For the commercial market, solutions such as 20kW + 30kWh ESS, 30kW + 60kWh ESS and 50kW + 100kWh ESS can support shops, offices, hotels, schools, factories and other commercial facilities. ONESUN currently lists 20kW/30kWh, 30kW/60kWh and 50kW/100kWh systems among its commercial and industrial products.

For larger industrial and grid-connected projects, ONESUN can scale energy storage from 100kWh, 215kWh and 500kWh to 1MWh and 2MWh BESS, allowing project developers to build modular storage capacity according to load demand and investment budgets.

Build Solar Battery Factory

Hybrid Solar + Battery for Cambodia

A strong project model for Cambodia is the Hybrid Solar System with Battery. Solar panels generate electricity during the day, while the battery stores surplus energy for evening consumption, peak periods or backup power.

ONESUN also offers All-in-One Solar Energy Storage Systems, integrating key components to simplify installation and system integration. Its product portfolio includes integrated ESS, LiFePO4 batteries, inverters, commercial & industrial BESS and complete solar kits.

For off-grid communities and customers with limited purchasing power, PAYGO solar systems provide another business opportunity. Through Pay-As-You-Go technology, distributors can offer solar energy systems with flexible payment models instead of requiring full payment upfront. ONESUN supports PAYGO, OEM/ODM and localized SKD/CKD solutions for international partners.

Solar Battery Storage OEM & ODM Solutions

Why Choose ONESUN as Your B2B Energy Storage Partner?

Choosing an energy storage supplier is not simply about purchasing batteries. B2B customers need stable quality, engineering support, customization, reliable supply and a business model that can scale.

First, ONESUN provides integrated energy storage capabilities. Founded in 2014, ONESUN manufactures batteries and inverters and has BMS and PCBA production capabilities, helping address battery-inverter communication and system integration requirements. The company states that its products have been exported to more than 70 countries.

Second, ONESUN provides OEM and ODM solutions. B2B partners can customize battery packs, BMS, system configurations, enclosure designs, branding, packaging and other product requirements. This allows Cambodian distributors, EPC companies and local energy brands to develop products under their own brands rather than simply reselling standard products.

Third, ONESUN provides SKD and CKD solutions. For Cambodian companies seeking local assembly, localized manufacturing or future battery and BESS production, ONESUN can provide a pathway from finished products to semi-knocked-down and completely knocked-down assembly. This approach can help partners optimize logistics, develop local technical capabilities and build a longer-term local energy storage business.

Build Solar Battery Factory

From Home Storage to 2MWh BESS

ONESUN's product portfolio covers multiple market levels: 5–20kWh residential energy storage, 20–100kWh commercial ESS, 100kWh–2MWh industrial BESS, telecom base station batteries, All-in-One Solar Systems, Hybrid Solar + Battery systems and PAYGO solar solutions.

The company's official website states that ONESUN has more than 3GW of successful projects, 768MW+ annual production capacity and uses Class A LiFePO4 batteries from leading Chinese brands.

For Cambodia, this means one supplier can support a project journey from a small residential solar battery to a commercial microgrid or MWh-scale BESS project.

Honorary-news

Build Cambodia's Next Energy Storage Market with ONESUN

Cambodia's renewable energy transition is creating opportunities for solar developers, EPC contractors, distributors, telecom operators, industrial companies and local energy investors. The future market will not depend on a single type of battery. It will require flexible solutions covering residential backup, commercial peak shaving, industrial energy storage, telecom backup, off-grid electrification and large-scale renewable integration.

ONESUN is positioned to support these opportunities through LiFePO4 battery technology, BESS, Hybrid Solar Systems, All-in-One ESS, PAYGO, OEM/ODM and SKD/CKD solutions.

For Cambodian B2B partners looking to build a solar energy storage business, develop localized assembly or launch their own energy storage brand, ONESUN can provide a complete pathway—from product design and battery manufacturing to system integration, OEM/ODM customization and local SKD/CKD deployment

Portable Solar Generator Systems