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Description
Fox ECS 4.03kWh HV Battery SlaveFox ECS 4. 03kWh HV Battery Slave The Fox ECS 4. 03kWh HV Battery Slave is a high performance lithium ion battery designed to expand the storage capacity of Fox ESS Energy Cube systems. With a nominal energy of 4. 03kWh, this modular battery provides exceptional performance and flexibility for residential and commercial solar power systems. Its high depth of discharge and reliable energy output make it an excellent solution for those looking to
Fox ECS 4.03kWh HV Battery Slave
The Fox ECS 4.03kWh HV Battery Slave is a high-performance lithium-ion battery designed to expand the storage capacity of Fox ESS Energy Cube systems. With a nominal energy of 4.03kWh, this modular battery provides exceptional performance and flexibility for residential and commercial solar power systems. Its high depth of discharge and reliable energy output make it an excellent solution for those looking to increase energy independence or ensure backup power availability.
Key Features
- 4.03kWh Capacity – Provides reliable energy storage for residential and commercial applications
- Scalable to 28.21kWh – Expandable with multiple modules for increased storage capacity (1 Master + up to 6 Slaves)
- High Depth of Discharge (90%) – Maximizes the usable energy from the battery
- Wide Temperature Tolerance – Designed to operate in various environmental conditions
- Easy Installation – Compact, lightweight design for quick and simple setup
- CAN/RS485 Communication – Enables seamless integration with inverters and monitoring systems
- High Voltage – Provides stable and efficient power output
Technical Specifications
-
Nominal Energy: 4,050 Wh
- Supplier Part No: Energy Cube CS4100
- Weight: 34.8 kg
- Battery Type: Lithium-Ion
- 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
- Part No: FE-HV-ECS-4100
Applications
- Residential Solar Storage – Stores excess solar energy for use during non-sunny periods or peak demand
- Commercial Power Backup – Ensures essential equipment remains powered during grid outages
- Off-Grid Systems – Enables full energy independence with reliable solar storage
What’s Inside the Box?
- Fox ECS 4.03kWh HV Battery Slave
- User Manual
- Installation Guide
Important Notes
- This battery module is part of a modular system and requires at least two modules for operation (1 Master + 1 Slave).
- A maximum of seven modules can be connected in a single stack (1x Master + 6x Slaves).
- If adding new battery modules to an existing Energy Cube stack, ensure compatibility with your original battery modules. Please contact your technical representative via the portal and provide a photograph of your current battery stack 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 malfunctions resulting from improper installation.
The Fox ECS 4.03kWh HV Battery Slave is a reliable, scalable, and high-efficiency storage solution for solar energy systems. Whether for self-consumption, backup power, or off-grid applications, this battery offers long-lasting performance and seamless integration into your energy system.
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
4.9 ★★★★★
Based on 2364 reviews
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Product Reviews
★★★★★ 4
Genuinely bummed that these great balls can’t stand up against my Chloè.
Size: Medium
I love all the Chuckit brand of balls. I found that the Strabo and glow balls in the Chuckit line are the softest, and as such, don't last as long as the rest of Chuckit line of balls. Having said that, they do last longer than than every other brand I've tried (and I do believe I’ve tried every brand available on the market today.)
The strato balls do bounce higher than any of the other balls in the Chuckit line. They really are a good value.
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Reviewed in the United States on March 30, 2022
★★★★★ 5
Great dog balls at a great price
Size: Medium
The balls are a favorite for my dog. I could have done without the hole through the middle because I don't do treats in balls anyway. My dog loves balls for their own merit. I needed replacement balls for my Nerf Dog Ball launcher. It seems the originals have disappeared from the market. I took a chance because the price is right and this Chuck-it ball works very well so we're liking this ball a lot. So far my Dachsund, who can destroy a tennis ball (the kind they are selling as Nerf Dog replacements) in 3 minutes has not done any damage to this one so that's a win. I recommend this as a much better ball than the fuzzy tennis balls. I like the colors too since many dog toys are green (which gets lost in the lawn, etc.) or red (even though dogs have red/green color blindness. Blue and orange are good and pretty easy to find. I liked these well enough that this set was my second purchase so I will have spares in case the others are lost.
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Reviewed in the United States on May 21, 2023
★★★★★ 5
My Baby loves his new baby!
Size: Medium, Size: Medium
Finally! A ball my 107 lb. pitty/pointer mix can’t destroy. He has torn up every single “indestructible” toy in a day or so until now. He peels fabric and fur off non-rubber toys. He is a 4-legged shredder. I’ve added pictures of him for a size reference of my dog versus this product. I know I had wanted that when shopping for this item.
This ball is now his beloved “baby.” He goes absolutely insane looking for it, chewing it, chasing it, and even sleeping with it. He won’t rest unless he knows exactly where it is. It is his only toy, and he is good with that. After getting this home, I tried giving him other choices, but he won’t touch them.
I was worried that he would rip it apart by putting his teeth in the holes, but so far, not a scratch. It is soft enough to collapse just enough to keep it from cracking when his jaws crush it but not so soft that he can rip it to sheds. The holes are large enough to prevent a suction or vacuum effect on his tongue or mouth. For his size jaws, it is a perfect fit. Other dogs might have problems with suction or be able to get their teeth in those holes and rip it apart. Who knows?
The older version of the Chuckit squeaky ball was his favorite for the year and a half he had it, but the way they make them now, he peels off the orange triangle in hours flat, the squeaker falls out (choking hazard), and then he rips it apart.
I’m going to stock up on these. I can’t imagine how crazy he will be if they ever stop production or change the materials.
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Reviewed in the United States on May 9, 2019
★★★★★ 5
This is a great ball for high energy dogs.
Color: Blue
I have a Belgian Malinois, so you can imagine the Maligator jaws. Just opened this today and let her play with it indoors. She LOVES IT. It wore her out and it’s a toy she can really stay focused on without needing me to throw or roll for her. It moves on its own! I supervised her play. I was hoping it was too big to get under the couch, but no. It goes right under it. I had to block off the gap so I didn’t have to keep getting it out from under for her. The outter “shell” is very durable! When she had resting moments, she chewed it pretty good - I could hear the material squeaking against her teeth. I was worried she was tearing it up, but nope! Not a mark on it. It’s easy to set up and operate. It needed charging before play. After hours of play, she was able to somehow unscrew the outter shell. This concerned me bc the smaller, inner ball mechanism came out but I saw it right away and was able to put it back together. So, make sure it’s screwed together tightly (which I thought I had done without breaking it) and check it from time to time to make sure it hasn’t loosened. This is a great ball for her incredible high energy drive. It gives her the work and fun play she needs to get tired, which I love. This toy is on the expensive end, but so far it’s worth it. Now we’ll see how long it lasts!
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Reviewed in the United States on October 7, 2025
★★★★★ 5
Love love it
Color: Blue
Best dog toy ever. I have a 1 year old boxer who is full of energy (understatement). This ball has provided more entertainment for us both than any dog toy I’ve ever purchased. Charge holds well and has a very resilient shell. I love it. Worth the price.
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Reviewed in the United States on May 23, 2026