By Fogstar Energy

5.12Kwh 48V LiFePO4 Battery

Regular price £1,049.99 GBP
Regular price Sale price £1,049.99 GBP
Tax included.
Availability: In stock
Regular price £1,049.99 GBP
Regular price Sale price £1,049.99 GBP

This product is on pre-order

You can pre-order the Fogstar Energy 5.12kWh battery now with just a 10% deposit. Shipping is expected to start late February, this will update closer to the time.

Maximize your energy independence with the Fogstar Energy SR51.2V Server Rack Battery, a UK-designed marvel built to seamlessly integrate with your existing off-grid set-up.

Unmatched Performance and Durability

  • Ample Storage: The SR51.2V boasts an impressive 5.12kWh capacity, ensuring you have enough power to run your appliances even during outages.
  • Long-lasting: Constructed with top-of-the-line EVE cells, this battery delivers an industry-leading 4000 cycles at 80% depth of discharge (DOD), guaranteeing exceptional longevity.

Effortless Integration and User-Friendly Operation

  • Seamless Compatibility: Integrate the SR51.2V effortlessly with your solar system thanks to pre-loaded inverter protocols that support leading brands like Victron, Pylontech, and more.
  • Simple Management: The intuitive LCD touchscreen allows you to change the inverter protocol without any software downloads.

Unwavering Reliability in All Conditions

  • Built for the UK Climate: Engineered to thrive in diverse weather conditions, the SR51.2V automatically activates its internal heating system in cold temperatures, enabling charging even as low as -20°C.
  • Enhanced Safety: A 125Amp DC Breaker safeguards against faults, ensuring the battery's integrity and your safety.

Scalable Power as You Grow

  • Expandable Storage: The SR51.2V adapts to your evolving needs. With the ability to connect up to 15 batteries in parallel, you can easily increase your storage capacity.

Key Features

  • UK-Climate Ready: Auto-heating for efficient charging in cold weather.
  • Pre-loaded Inverter Protocols: Hassle-free integration with major inverter brands.
  • User-Friendly LCD Touchscreen: Effortless inverter protocol adjustments.
  • Industry-Leading Lifespan: 4000 cycles at 80% DOD for extended battery life.
  • Robust Safety Features: 125Amp DC Breaker for enhanced protection.

Harness the Full Potential of Your Solar Energy:

With the Fogstar Energy SR51.2V Server Rack Battery, you can store excess solar energy during the day and power your home or business throughout the night, even during grid outages.

Manufacturer: Fogstar Energy
Model: ESR51.2V 5.12KWH
EVE Cell Model: LF100LA
Cell Assembly: 16S1P
Cycle Life: 4000 Cycles at 1C to 80%. (After 4000 cycles, you will still have a battery that can deliver 80% of the stated capacity) 5.12Kwh is fully useable.
BMS: PACE 100A BMS
Maximum Discharge: 100A
Balance Current: 0.5A
Capacity: 100ah
Weight: 45.2kg
Nominal Voltage:
 51.2V
Rack Unit Size: 3.5U
Size: 3.5U or 450(W) x160(H) x 440(L) mm
Pre-loaded Inverter Protocols: Victron, Sofar, Pylontech, Growatt, Solis, Goodwe.

  • Fogstar ESR51.2V 5.12KWH Rack Battery
  • PC communication cable RS232 to USB
  • Positive 35mm cable
  • Negative 35mm cable.

Ordering more than one? We'll also include;

  • Battery to Battery (B2B) communication cables (RS485 to RS485).

Q: How many Fogstar Server Rack batteries can I connect together?
A: You can connect up to 15 Fogstar Energy Racks in parallel.

Q: Can I connect my Fogstar batteries with other brands of server rack batteries?A: No, it is not recommended. Fogstar batteries are not compatible with other brands due to potential differences in power output, size, BMS and system compatibility.

Q: Do I need an inverter to use the Fogstar batteries?
A: No, the batteries can function without an inverter. However, if you want to use them with an inverter, the Fogstar PACE BMS supports various inverter protocols for seamless integration.

Q: How can I connect my Fogstar batteries with a Victron Multiplus II inverter?
A: You will need to purchase a separate Victron Cerbo GX and a type B Victron battery BMS to VE CAN cable to enable communication between the batteries and the inverter.

Q: Why isn't Fogstar on the approved list for my inverter?
A: Fogstar believes that inverter "approved lists" limit consumer choice and restrict market competition. They aim to make batteries affordable and accessible, and view these lists as hindering progress and innovation. While they may not be on your specific list, their batteries may still be compatible with your inverter.

Q: Does self-installation void my warranty?
A: No, self-installation does not affect your Fogstar warranty.

Q: Can I mount the battery rack on its side?
A: Yes, side mounting is possible, but it may be inconvenient to read the touchscreen display.

Q: Do you supply inverter cables?
A: No, Fogstar generally does not supply inverter cables with the 5.12kWh racks due to the varying needs of different inverters and setups. Cable types, lengths, and thicknesses depend on specific inverters and battery configurations. Most inverter manufacturers include these cables as standard accessories.

The 35mm cables provided are for connecting multiple Fogstar batteries together, not for connecting to the inverter. You only need these if you have more than one battery rack.

Q: How do I turn the breaker on/off?
A: To turn the breaker ON, switch it UP.  
    To turn it OFF, switch it DOWN.

Q: What are the charging parameters for the battery?

A: Bulk: 57.6 volt
    Float: 55.2 volts
    Low DC cut-off: 43.2 volts.

Fogstar Energy warrants the Fogstar Energy 48V 15.5kWh ("Product") to be free from defects in cells, BMS and workmanship for a period of eight (8) years from the date of purchase ("Warranty Period").

What is Covered:

  • This warranty covers the repair or replacement of any defective parts of the Product during the Warranty Period, at Fogstar's sole discretion.

What is Not Covered:

  • This warranty does not cover:
    • Damages caused by:
      • Gross negligence
      • Normal wear and tear
      • Accident or collision
      • Abuse or misuse
      • Incorrect installation
      • Acts of God (e.g., lightning, flood, fire)
      • Any disassembly or modifications to the Product not made by Fogstar or its authorised representatives
      • Alterations or modifications to the Product not made by Fogstar or its authorised representatives.
    • Any claims made after the Warranty Period has expired
    • Transportation costs associated with returning the Product for warranty service
    • Installation or removal costs of the Product
    • Any consequential or incidental damages, including but not limited to, loss of use, loss of data, or lost profits

Repair or Replacement:

  • In the first instance, Fogstar will attempt to troubleshoot and repair any issues with the Product before resorting to replacement.
  • If repair is not feasible, Fogstar will, at its sole discretion, replace the Product with a new or refurbished unit of equal or greater value.
  • Refurbished units will be of equivalent functionality and performance to a new unit and will have undergone rigorous testing to ensure compliance with warranty standards.

How to Make a Warranty Claim:

  • To make a warranty claim, please contact Fogstar customer support at customerservice@fogstar.co.uk. You will be required to provide a copy of your purchase receipt and a description of the problem you are experiencing.
  • Fogstar will then guide you through the troubleshooting process and determine the appropriate course of action.

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