OEM Energy Storage Systems: Build a Custom ESS with SolisStorage
OEM Energy Storage Systems: Build a Custom ESS with SolisStorage
For businesses that need an energy storage system (ESS) that matches their brand, regional grid requirements, or project-specific performance targets, off-the-shelf hardware is not always enough. OEM and ODM energy storage manufacturing allows a distributor, installer, or project developer to specify how the system is built, configured, and presented. This guide explains what OEM and ODM mean for energy storage, what can be customized, how the production process works, and how SolisStorage supports custom ESS projects from specification to delivery.
What Is an OEM Energy Storage System?
An OEM (Original Equipment Manufacturer) energy storage system is an ESS produced by a manufacturer according to a buyer's specifications and then sold under the buyer's brand. In an ODM (Original Design Manufacturer) arrangement, the manufacturer also contributes to the design of the product based on the buyer's requirements. In both cases, the buyer does not need to build its own factory or develop power electronics from scratch.
Ginlong (Solis) Technologies Co., Ltd., founded in 2005, is a global solar inverter manufacturer and energy storage solution provider. Its energy storage subsidiary, SolisStorage, provides OEM and ODM production services for residential energy storage systems, commercial and industrial (C&I) energy storage systems, and utility-scale energy storage systems. The company is listed on the Shenzhen Stock Exchange (Stock Code: 300763) and has a manufacturing base with a factory area of 98,114.69 m², more than 5,000 employees, and an annual output of 80 GW.
Why Choose OEM / ODM for Energy Storage?
Energy storage buyers choose OEM or ODM for several practical reasons. First, it lets them launch a branded energy storage product without building a production line. Second, it allows the system to be aligned to regional voltage standards, communication protocols, and certification requirements. Third, it gives project developers a way to standardize a system configuration that fits a repeatable application, such as warehouse self-consumption or commercial backup power.
For many importers and distributors, the value of OEM is not just product supply. It is the ability to differentiate through software, branding, and regional compatibility while relying on a manufacturer with proven power electronics experience and system integration capability.
Customization Options for a Custom ESS
SolisStorage offers customization options that cover both hardware identity and functional configuration. These options include:
- Logo: brand marking on the product to match the buyer's brand identity.
- Outer package: packaging design and labeling aligned to regional market expectations.
- Software interface: user interface language, layout, and branding for monitoring and control.
- Regional voltage standard: voltage and frequency configuration for the target market.
- Communication protocol: interface compatibility with local EMS, aggregator, or VPP platforms.
- Function parameter: charge and discharge parameters, limits, and behavior settings matched to the application.
These customization capabilities are supported by the EverCore ESS product line. The EverCore ESS is a C&I energy storage system available in rated energy capacities of 100.5 kWh, 120.6 kWh, and 261.2 kWh, with inverter power ratings of 50 kW, 60 kW, and 125 kW. It uses A-grade 314Ah LFP cells from EVE, with an 8,000-cycle life at 0.5C charge-discharge (remaining capacity ≥ 70%) and an anti-corrosion class of IP55 for the cabinet and IP66 for the inverter.
What Makes the EverCore ESS Suitable for OEM Projects?
OEM buyers need a base platform that is reliable, adaptable, and easy to maintain. The EverCore ESS is designed around several engineering choices that directly benefit custom projects.
AC-DC Separation Architecture
The EverCore ESS physically separates the hybrid energy storage inverter (AC side) from the battery cabinet (DC side). Because the 6 kW of inverter power heat is dissipated into the ambient environment, only 3.5 kW of electrochemical heat needs to be managed inside the battery cabinet. This improves cell temperature uniformity while retaining an air-cooled design.
High IP Ratings and Protection Separation
The inverter achieves an IP66 protection rating, while the battery cabinet maintains IP55. The separated protection design is intended to reduce the system's full-lifecycle failure rate by 50%.
DC-Side Expansion Without Additional Inverter Investment
One EverCore inverter can connect up to 6 battery cabinets in parallel. For an OEM partner, this means a single platform can serve multiple energy capacity configurations: a 125 kW inverter can be paired with 261.2 kWh, 522.4 kWh, or more, depending on the project requirement. SolisStorage estimates this reduces system expansion costs by approximately 10%.
For example, a 125 kW / 522 kWh configuration has already been delivered in Thailand for a self-consumption and backup power project. The same inverter platform therefore enables multiple project sizes within one OEM product family.
Integrated Hybrid Inverter Design
The 50–125 kW hybrid energy storage inverter integrates PCS, STS, PV inverter, circuit breaker protection, and EMS into one unit. This reduces the number of external components an OEM buyer needs to source and simplifies system design. It also enables seamless grid-tied / off-grid switching in less than 10 ms without an external STS, which is important for power quality in industrial settings.
OEM Manufacturing and Quality Control at SolisStorage
OEM and ODM buyers should evaluate not only the product specification but also how the product is manufactured and tested. SolisStorage operates an integrated intelligent production line with a global total monthly capacity of over 10,000 units.
Quality control before shipment includes:
- 100% full functional test before shipment
- Raw material incoming inspection
- Aging test
- High-low temperature cycle test
- IP protection test
These tests are directly relevant to an ESS, which operates outdoors or in semi-outdoor industrial environments. For OEM buyers, the existence of these tests reduces the risk of field failures and warranty claims.
OEM MOQ, Lead Time, and Commercial Terms
Understanding MOQ and lead time is essential for planning an OEM project.
| Commercial Factor | SolisStorage Terms |
|---|---|
| MOQ (standard off-the-shelf models) | 1 unit |
| MOQ (customized OEM orders) | 20 units |
| Lead time (mass OEM orders) | 30–45 days |
| Delivery method | FOB Ningbo / EXW factory delivery |
| Acceptance | Factory acceptance testing + on-site installation and commissioning |
| Payment | Deposit + payment before/after shipment + final acceptance payment |
Payment terms depend on customer tier, order size, and regional policies. For buyers starting with a standard product, a single-unit MOQ allows evaluation before committing to a customized order.
OEM / ODM Customization Workflow
A typical OEM / ODM energy storage project follows this workflow:
- Requirement definition: Define the target market, grid standard, communication protocol, branding, and performance targets.
- Feasibility review: The manufacturer reviews whether the customization can be supported on the existing EverCore platform.
- Sample or specification lock: Agreement on logo, package, software interface, voltage, protocol, and function parameters.
- Production: Integrated intelligent production line manufacturing with incoming inspection and in-process quality control.
- Testing: 100% full functional test, aging test, high-low temperature cycle test, and IP protection test.
- Delivery: FOB Ningbo or EXW delivery, followed by factory acceptance testing and on-site commissioning support.
Use Cases for Customized Energy Storage
OEM / ODM energy storage fits several practical scenarios in the market.
Regional Distributors Building a Branded ESS Portfolio
A distributor in Europe or Southeast Asia can offer a branded residential or C&I ESS without developing its own inverter and battery management technology. Customization of the software interface, logo, and outer package allows the distributor to create a consistent brand experience.
Project Developers Standardizing a C&I Configuration
Project developers who repeatedly install energy storage for commercial customers can standardize on a configuration such as 125 kW / 261 kWh or 125 kW / 522 kWh. The EverCore platform supports DC-side expansion, so the same inverter can serve different capacities across projects.
In Denmark, a 125 kW / 261 kWh EverCore ESS was installed for warehouse self-usage. The system delivers savings on electricity bills and switches between on-grid and off-grid in under 10 milliseconds to prevent interruptions. For an OEM buyer, this is an example of a proven configuration that can be replicated under a local brand.
EPC and System Integrators Needing Protocol Compatibility
Energy storage systems increasingly need to communicate with third-party EMS, aggregator, or VPP platforms. The EverCore ESS has been connected or is in the process of connecting with 102 third-party VPP/EMS operators across 11 European countries. In the UK, it integrates with the Kraken platform under Octopus Energy; in the Nordic market, it connects to aggregator platforms such as Check Watt. For OEM buyers, communication protocol customization is therefore not a niche feature but a practical requirement for revenue participation in European electricity markets.
2026 Market Context: Why OEM ESS Demand Is Growing
The global energy storage systems market was valued at approximately USD 668.7 billion in 2024 and is projected to reach USD 5.12 trillion by 2034. Long-duration energy storage was valued at USD 4.85 billion in 2024 and is expected to grow at a CAGR of 13.6% through 2030. As project scales increase, buyers are looking for more than a single product: they need a reproducible system architecture that can be branded, configured, and serviced across multiple projects.
OEM / ODM capability is also increasingly important for regional compliance. For the EU market, SolisStorage holds an EMC certificate (certificate number AE 50712374 0001) under the CE EMC Directive 2014/30/EU and an IEC 62619 safety certificate (certificate number JPTUV-182135) covering Zone 2. For OEM buyers targeting Europe, starting from a platform that already holds these certificates reduces the compliance burden compared to designing a system from scratch.
How to Evaluate an OEM Energy Storage Manufacturer
Before choosing an OEM partner, assess the following dimensions:
| Evaluation Criteria | What to Check | SolisStorage Reference |
|---|---|---|
| Power electronics experience | History in inverter design and grid integration | Founded in 2005; 1000+ R&D team |
| Production capacity | Monthly output and factory scale | Factory area 98,114.69 m²; over 10,000 units monthly capacity |
| Customization scope | Whether customization covers hardware, software, and branding | Logo, outer package, software interface, voltage standard, protocol, function parameter |
| Compliance support | Certifications for target market | CE EMC (AE 50712374 0001); IEC 62619 (JPTUV-182135) |
| After-sales service | Response time and spare parts support | 24/7 remote support; 27 overseas service centers; 48-hour on-site handling |
FAQ: OEM / ODM Energy Storage with SolisStorage
Does SolisStorage provide OEM and ODM production services for energy storage?
Yes. SolisStorage, the energy storage subsidiary of Ginlong (Solis) Technologies, provides OEM and ODM production services. Customization options include logo, outer package, software interface, regional voltage standard, communication protocol, and function parameter. The EverCore ESS platform is the base product for C&I OEM projects.
What is the minimum order quantity for a customized ESS?
For standard off-the-shelf models, the MOQ is 1 unit. For customized OEM orders, the MOQ is 20 units. This allows a buyer to evaluate a standard unit first and then scale to a customized order.
Which certifications does the EverCore ESS hold for the EU market?
The EverCore ESS holds a CE EMC certificate (AE 50712374 0001) under the EMC Directive 2014/30/EU, issued by TUV, covering the EverCore-261kWh and EverCore-261kWh-PRO. It also holds an IEC 62619 safety certificate (JPTUV-182135) covering Zone 2, with a validity period to 2031-06-01.
Can the EverCore ESS support multiple capacity configurations in an OEM product family?
Yes. A single EverCore inverter supports up to 6 battery cabinets in parallel, enabling configurations such as 125 kW / 261 kWh and 125 kW / 522 kWh. The 125 kW / 522 kWh configuration has been used in a self-consumption and backup power project in Thailand.
What is the lead time for a mass OEM order?
The lead time for mass OEM orders is 30–45 days. Spot goods are available for standard models. Delivery is available under FOB Ningbo or EXW terms. If you are planning an OEM project, contact SolisStorage to confirm the current schedule and customization scope.
Next Step: Start Your Custom ESS Project
OEM / ODM energy storage is a practical path to launch a branded ESS with proven technology, controlled quality, and regional compliance. SolisStorage provides customization for logo, outer package, software interface, regional voltage standard, communication protocol, and function parameters, supported by a production line with over 10,000 units of monthly capacity and quality control that includes 100% functional testing before shipment.
To discuss your target market and customization requirements, contact SolisStorage at sales@ginlong.com or via WhatsApp at +86 158-5815-3307.
Download the Solis Global Brochure (PDF) for an overview of the product portfolio and company capabilities.