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Description
Fox ECS 4.03kWh HV Battery MasterFox ECS 4. 03kWh HV Battery Master Scalable High Voltage Energy Storage The Fox ECS 4. 03kWh HV Battery Master is a high performance lithium ion battery designed to serve as the control module in a scalable energy storage system. This master battery unit ensures seamless communication and energy distribution across the battery stack, making it an essential component for residential and commercial energy storage applications. With a 4. 03kWh capacity
Fox ECS 4.03kWh HV Battery Master – Scalable High-Voltage Energy Storage
The Fox ECS 4.03kWh HV Battery Master is a high-performance lithium-ion battery designed to serve as the control module in a scalable energy storage system. This master battery unit ensures seamless communication and energy distribution across the battery stack, making it an essential component for residential and commercial energy storage applications. With a 4.03kWh capacity and high-voltage operation, it provides reliable power management for various energy storage needs.
Key Features
- Master Battery Unit – Required to manage and control a battery stack
- Scalable to 28.21kWh – Supports up to 6 additional slave batteries
- High Voltage & High Efficiency – Ensures stable and optimized energy performance
- 90% Depth of Discharge – Maximizes usable energy output
- Wide Temperature Tolerance – Designed for performance in various environments
- Easy Installation – Compact, lightweight design for quick and simple setup
- CAN/RS485 Communication – Enables seamless integration with inverters and monitoring systems
Technical Specifications
- Nominal Energy: 4,050 Wh
- Depth of Discharge: 90%
- Voltage: 52 V
- Continuous Discharge Rate (Normal Use): 2,875 W
- Maximum Discharge Rate (5 Minutes): 2,875 W
- Surge Discharge Rate (15 Seconds): 2,875 W
- Maximum Charge Rate (5 Minutes): 2,875 W
- Weight: 38.25 kg
- Battery Type: Lithium-Ion
- Part No: FE-HV-ECM-4100
Applications
- Residential Solar Storage – Stores excess solar energy for use during non-sunny periods or peak demand
- Commercial Power Backup – Provides continuous power to essential equipment during outages
- Off-Grid Systems – Supports complete energy independence with reliable solar battery storage
What’s Included in the Box?
- Fox ECS 4.03kWh HV Battery Master
- User Manual
- Installation Guide
Important Notes
- This battery must be used in a stack with at least one slave module (minimum of two batteries required).
- A maximum of seven modules can be stacked together (1 Master + 6 Slaves).
- If adding battery modules to an existing stack, ensure compatibility with your original battery modules. Contact your technical support provider and upload a photo of your current battery stack via the portal for verification.
- Connector Type: Ensure the new battery matches the connector type of your existing setup when expanding the system.
- Installation Requirement: This battery must be installed by a qualified electrician following local wiring standards and safety regulations. Incorrect installation may cause system issues, and Solareon UK is not responsible for any malfunctions resulting from improper installation.
Why Choose the Fox ECS 4.03kWh HV Battery Master?
The Fox ECS 4.03kWh HV Battery Master is a powerful, scalable, and high-efficiency energy storage solution. Whether used for solar self-consumption, backup power, or off-grid applications, it delivers exceptional performance, longevity, and seamless system integration to maximize energy efficiency and reliability.
Disclaimer:
All product information provided by Solareon UK is intended for general guidance only and may be subject to change or error. Solareon UK does not accept liability for any inaccuracies or omissions in the product specifications displayed. For accurate and detailed technical information, please refer to the manufacturer’s official datasheet available in the 'Downloads' section. We strongly advise confirming all critical details directly with the manufacturer prior to making purchasing or installation decisions.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 20 reviews
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Product Reviews
★★★★★ 4
Sturdy Folding Room Divider with Good Privacy Coverage and Modern Look
Color: Black, Size: 4 Panel-88''
I picked this room divider up to help separate space in a room without needing permanent walls, and overall it works very well for creating privacy while still looking clean and modern.
The size is one of the biggest advantages. At 6 feet tall and roughly 88 inches wide, it creates a noticeable visual separation and works well for apartments, dorms, offices, studios, shared rooms, or content creation setups where you want to hide clutter or define different areas.
The black fabric and frame design give it a simple modern appearance that blends easily into most spaces without looking overly decorative or outdated. It has a clean minimalist look that works especially well in offices, bedrooms, gaming rooms, or studio environments.
Assembly was fairly straightforward overall. Once fully put together, the divider feels reasonably stable for normal indoor use. The folding panel design also makes it flexible enough to angle different ways depending on the room layout.
The portability is another strong point. Since it folds down, it is much easier to move or reposition compared to permanent partitions or heavier wooden dividers. That makes it practical for temporary privacy setups or changing room layouts frequently.
Privacy performance is solid visually. It blocks sightlines well enough for changing areas, workspaces, video backgrounds, or separating sections of a room. The fabric also softens the space slightly instead of feeling harsh or industrial.
One thing worth noting is that while it provides visual privacy, it is not soundproof. It helps define space and reduce some openness, but conversations and noise will still pass through normally.
The material quality feels decent for the price range. The frame is lightweight but functional, though I would still avoid rough handling or constant aggressive repositioning over time.
Value for money is good considering the size, flexibility, and convenience. Similar room dividers can become expensive quickly, especially for taller multi-panel setups.
Overall, this is best for anyone needing an affordable flexible way to create separation and privacy in shared or open spaces. It works especially well for apartments, dorms, offices, studios, remote work setups, or content creators wanting a cleaner background without permanent construction.
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Reviewed in the United States on May 8, 2026
★★★★★ 5
Looks nice but it's not very stylish, works as intended, happy with purchase
Color: Black, Size: 4 Panel-88''
This 6 ft room divider is exactly what I needed and works great! It was very easy to set up and took only a few minutes to assemble. I was pleasantly surprised by how lightweight it is, and it folds up easily for storage when not in use.
The fabric-style panels look nice and provide good privacy, and the included clips help keep everything neatly in place. It’s a simple but effective design that does what it’s supposed to do.
Because it’s lightweight, it may need a bit of extra support depending on where you place it—I used small weights on the base, and that completely solved the stability issue.
Overall, I’m very happy with this purchase. It’s practical, easy to use, and a great value for the price. I would definitely recommend it! Industrial
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Reviewed in the United States on May 22, 2026
★★★★★ 3
Assembly is harder than it should be; you get what you paid for
Color: Black, Size: 4 Panel-88''
Review of SUNALLY Room Divider 6FT Folding Privacy Screens, 4 Panel Fabric Divider for Room Separation, 88" W Freestanding Portable Wall Dividers Screen for Home Dorm Studio Office, Black
I hate when I have to leave products a not so good review...
Assembly is harder than it should be, mainly because there shouldn't BE any assembly. I have ordered several room divider privacy screens over the last couple of years and not one of them needed any kind of assembly. With that aside, it STILL was a pain in the sphincter to assemble. One of the "legs" just sits on top of a foot plate - it's not screwed in to anything.
It's kind of flimsy and the base plates don't have anything on them to not scuff up the floor.
With all that said, though, it does stand up and will block out what I need to block out. At the less-than-$50 price-point, it's kind of what should be expected. If I had purchased this outright, I would have considered sending it back and getting a higher quality. But if you only have $50 to spare and don't mind assembling things, it could be good for you.
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Reviewed in the United States on April 28, 2026
★★★★★ 5
Great buy
Color: Black, Size: 4 Panel-88''
This room divider is exactly what I needed. When you have 2 kids sharing a room and don’t want to spend a lot of money to divide their space this is what you can use. Believe it or not they are much happier now. This came in a small box which scared me but once I was able to get this up I was very pleased. It was easy to put together. The fabric is pretty good quality, it’s stable and stands up fine. Good value and worth it to have peace and quiet in the house.
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Reviewed in the United States on May 18, 2026
★★★★★ 1
Junk
Color: Black, Size: 4 Panel-88'', Color: Black, Size: 4 Panel-88''
Horrible. The parts are not right. It won’t fit together or disassemble and can’t return it like this. Parts won’t fit properly and missing holes for screws. Also, can’t get through to a person for any assistance. Picture shows the hole and then the lack of a hole where a screw belongs.
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Reviewed in the United States on May 13, 2026
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