125kW 257kWh Commercial Battery Energy Storage System | Air-Cooled Industrial BESS Cabinet
The 125kW 257kWh Energy Storage System is a high-performance commercial battery energy storage system (BESS) designed for industrial and commercial applications. This air-cooled energy storage system integrates PCS, EMS, BMS, lithium battery packs, fire protection, and HVAC into a single cabinet.
With high energy density, flexible deployment, and intel
ligent energy management, this industrial energy storage cabinet supports both on-grid and off-grid applications, making it an ideal lithium battery energy storage solution for modern energy systems.
Key Features of ARC DKF-257
Built-in PCS, EMS, BMS, and battery packs
Compact industrial energy storage cabinet
Easy installation and maintenance
Rated Power: 125kW
Capacity: 257kWh
System efficiency up to 88%
Long lifecycle: >8000 cycles
Intelligent temperature control
Stable performance in harsh environments
Suitable for industrial applications
Supports PV + Storage
PV + Storage + Diesel Generator
PV + Storage + EV Charging
Integrated EMS for intelligent control
Real-time monitoring and optimization
Supports remote communication (CAN / RS485 / Ethernet / 4G optional)
Technical Specifications
| Model | ARC DKF-257 | |
| DC side | Battery cell type | LFP 3.2V/314Ah |
| Battery system string | 1P256S | |
| System capacity | 257kWh | |
| Rated voltage | 819.2VDC | |
| Voltage range | 691-921VDC | |
| AC side On Grid | Rated power | 130kW |
| Rated frequency | 50/60Hz | |
| Rated current | 189A | |
| Rated grid voltage | 380/400VAC | |
| Grid voltage range | 360-420VAC | |
| Adjustable range of PF | -1(Speed-up)~-1(Delay) | |
| THDi | ＜3%(Rated power) | |
| AC side Off Grid | Rated power | 130kW |
| Rated frequency | 50/60Hz | |
| Rated current | 189A | |
| AC voltage range | 360-420VAC | |
| THDi | ＜3%(Rated power) | |
| System parameters | System efficiency | MAX.efficiency 88% @0.5C / 1 Charge 1 Discharge |
| System lifespan | >8000Times(0.5C@25°) Energy retention rate≥80% | |
| Wiring method | AC bottom entry/3-phase 4-wire(3L+N+PE | |
| Charge & discharge rate | 0.5CP | |
| Thermal management method | Intelligent air-cooled air conditioner | |
| Communication protocol | CAN/Eth/RS485(4G Optional) | |
| Fire protection system | Aerosol & Perfluorohexanone | |
| IP rating | IP54 | |
| Product size | 2800kg | |
| Product weight | 1550*1268.5*2185mm | |
| Environmental Requirements | Operating temperature range | 0℃~+50℃ |
| Operating humidity range | 0~95%RH(No condensation) | |
| Operating altitude | 2000m (＞2000m Derating) | |
| Certification | PACK:CE ROHS Equipment:UN38.3 MSDS | |
| Warranty | 5 Years | |
Application Scenarios
Commercial buildings
Industrial factories
Solar + storage systems
EV charging stations
Microgrid systems
Backup power systems
This 125kW 257kWh energy storage system is ideal for peak shaving, load shifting, and improving energy efficiency.
Safety & Reliability
Dual fire protection system
High-quality lithium battery cells
IP54 protection for outdoor installation
Certified: CE, UN38.3, MSDS, ROHS
Why Choose This BESS?
Reliable commercial battery energy storage system
Scalable and parallel expandable
Strong environmental adaptability
Intelligent EMS control
Long lifespan and low maintenance
FAQ
Q1: Is this 125kW 257kWh energy storage system suitable for my project?
A1: Yes, it is ideal for factories, commercial buildings, and solar projects. Share your energy needs, and we can recommend the best configuration for you.
Q2: Can I customize the commercial battery energy storage system?
A2: Absolutely. We support customization in capacity, voltage, and system integration. Contact us to discuss your specific requirements.
Q3: How fast can you deliver the system?
A3: We maintain stable production and stock for key components, ensuring fast delivery. Send us your quantity and destination for an accurate timeline.
Q4: Do you provide technical support and installation guidance?
A4: Yes, we offer full technical support, including system design, remote guidance, and documentation to ensure smooth installation and operation.
Q5: Can this air-cooled energy storage system work with my existing solar system?
A5: Yes, it is compatible with most PV systems and supports hybrid solutions. Contact us with your system details for compatibility confirmation.
Q6: What makes your lithium battery energy storage solution competitive?
A6: We combine high-quality LFP cells, advanced EMS, and strict quality control to deliver reliable performance and long lifespan at competitive pricing.
Q7: Is the system expandable in the future?
A7: Yes, the modular design allows easy parallel expansion. Let us know your future plans, and we can design a scalable solution.
Q8: How can I get a quotation quickly?
A8: Simply send us your project details (load, location, application), and we will provide a professional proposal and quotation within 24 hours.
We are a leading innovator and manufacturer in lithium battery technology, dedicated to engineering and manufacturing high-quality LiFePO4 solar batteries and power systems. Our core business involves the complete lifecycle of product development, from initial design to final production of dependable lithium battery packs. We proudly serve diverse sectors with customized solutions for energy storage, critical backup power systems, and compatible inverters and solar panels.
Based on automated production technology, Arcvolt are able to meet our customers' product needs quickly. However, the exact lead time depends on the quantity and the season you place the order.
Usage scenario: wall-mounted batteries, rack-mounted batteries, and stacked batteries. Voltage: 48V or 51.2V batteries, low/high voltage batteries Application: Residential storage batteries, industrial and commercial energy storage batteries.
While the typical home system uses 2 or 3 batteries, the perfect number for you is a personal choice. It all comes down to what you want to power during a grid outage and for how long. Do you need to run just the essentials or your whole house?
Yes, going completely off-grid is possible, but it's a significant step beyond standard solar with battery backup. A true off-grid system requires a much larger solar array and battery bank to power your home 24/7, making it a substantial investment. You also need a reliable backup source, like a generator, for days without sun. It's important to note that in North Carolina, disconnecting a home from the utility grid can be a complex process.
We accept EXW,FOB,CFR,CIF,etc. You can choose the one which is the most convenient or cost effective for you.
Absolutely. Our in-house design team specializes in OEM and ODM projects to bring your brand's vision to life. Simply provide us with your concept, high-resolution logo, and any text or images you'd like to include. We will then create a professional design proof for your final approval before we proceed.
Certifications are a key part of our pre-production checklist. We start by confirming with you which certifications are needed. These requirements are then integrated into the project timeline to ensure completion before shipment, and are formally documented in the signed agreement.
We offer lifetime technical support, with our engineers available 24/7 to provide prompt online assistance.
Yes, most of Arcvolt's inverters are designed to be scalable, meaning your system can grow with your needs. However, it's something that requires planning. Before adding more panels, it's essential to confirm that your current inverter can handle the additional power. We always recommend discussing your future plans with a professional to ensure your initial system is future-ready.
It depends on whether you have batteries. For Solar + Battery systems: A hybrid inverter is essential. It seamlessly manages power from panels and batteries in a single unit. For Solar-Only systems: Traditional inverters (like string or microinverters) are an option. The main advantage of a hybrid inverter is that it eliminates the need for a separate charge controller, making for a cleaner and more efficient installation.
Selecting the right inverter is one of the most important decisions you'll make for your solar project. While technical specifications matter, the long-term value comes from the manufacturer. Arcvolt advise customers to look beyond the data sheet and assess the company on these five critical points: their warranty, quality control standards, customer service responsiveness, installation support, and competitive pricing.
Generally, you want the inverter's size to match your solar array's power output. So, if you're installing a 5,000-watt solar system, you'll need an inverter of at least 5,000 watts to handle the load.
Yes, samples are available upon request as part of the qualification process for bulk orders. Please reach out to a member of our customer service team to discuss your specific requirements and they will assist you with the next steps.
Think of it as your personal energy bank. During the day, it saves up all the extra, unused power your solar panels generate. Then, you can draw from that stored energy whenever you need it—at night, during a power outage, or to avoid high-cost peak hours. For homeowners, this means energy independence and peace of mind. For businesses, it's a powerful tool to slash electricity bills.
Smart inverters are central to a system's reliability. Our inverter provide a constant stream of performance data, giving you a real-time view of your entire solar array. If a problem arises, the inverter's diagnostic tools can pinpoint the exact issue, which significantly speeds up repairs. This intelligent monitoring is key to preventing small problems from becoming big ones and guarantees the consistent, reliable operation you expect.
MPPT is a crucial technology that ensures you're not wasting sunlight. Because sun conditions are always changing, there is always a single, optimal point where your solar panels operate most efficiently. MPPT is the brain that constantly scans and adjusts the system to find and stay locked onto that "maximum power point." This guarantees you are harvesting the most energy possible from your panels at any given moment.
It's a question of priorities, and the logical first step is always generation. You have to make power before you can store it. Solar panels directly reduce your utility bills by producing electricity. Batteries give you control over when you use the excess electricity you've already made. We help our customers design a system that maximizes their solar panel array first, as this delivers the biggest and fastest return on investment.
A grid-tied inverter is the standard type used to reduce your electricity bills with solar. It safely connects your solar system to the utility's grid, allowing you to seamlessly feed any surplus power you produce back to the utility. In return, you receive credits on your bill for that energy, a process known as net metering. For safety, these inverters automatically shut down during a power outage.
The exact amount of power you generate is unique to your home and depends on your system's size, your roof's orientation, and how much direct sun you get. However, to give you a real-world idea, our typical 6kW home system can produce around 30kWh of electricity on a clear, sunny day. For most households, that's more than enough to cover all of your energy needs for a full 24 hours.
