Description
xFogStar 5.12kWh 48V 100Ah LiFePO4 Rack Battery
The FogStar 5.12kWh 48V 100Ah LiFePO4 Rack Battery is a high performance energy storage solution designed for modern solar and off grid systems. Built using premium Grade A EVE LiFePO4 cells, this battery delivers outstanding reliability, safety, and long term value for both residential and commercial applications.
With fully usable capacity, advanced battery management, and wide inverter compatibility straight out of the box, the FogStar rack battery is ideal for anyone looking to reduce energy bills, maximise solar self consumption, or achieve true energy independence.
Unmatched Performance and Long Service Life
This 5.12kWh rack battery provides reliable power storage for everyday use, backup power, and off grid operation. The high quality EVE LF100LA cells deliver 4000 cycles at 80 percent depth of discharge, meaning you still retain around 80 percent of usable capacity even after years of operation.
The full 5.12kWh capacity is usable, making it an efficient and cost effective choice compared to many alternatives on the market.
Seamless Inverter Compatibility and Easy Setup
The FogStar rack battery is supplied with pre loaded inverter protocols, allowing effortless integration with many leading inverter brands, including Victron, Pylontech, Growatt, Sofar, Solis, Goodwe.
The built-in LCD touchscreen allows quick and simple selection of inverter protocols without downloading any BMS software, making installation and configuration straightforward for installers and end users.
Designed for the UK Climate
Engineered specifically for real-world UK conditions, the FogStar battery includes an automatic internal heating system. When temperatures fall below 5°C, the heater activates to allow safe charging even in extreme cold conditions down to -20°C.
This ensures year-round performance and reliability, especially in unheated garages, plant rooms, and outdoor battery enclosures.
Advanced Safety and Protection
Safety is at the core of the FogStar design. The battery is equipped with a high-quality PACE 100A BMS for intelligent cell monitoring and protection, along with a built-in 125A DC circuit breaker to safeguard against electrical faults.
LiFePO4 chemistry provides excellent thermal stability and is widely regarded as one of the safest lithium battery technologies available.
Expandable Energy Storage
As your energy needs grow, the FogStar rack battery grows with you. Up to 32 batteries can be connected in parallel, or 31 when used with Victron systems, allowing you to scale your storage capacity to suit larger solar arrays or higher consumption demands.
This makes it an excellent long-term investment for expanding homes, businesses, and off-grid installations.
Key Features
- 5.12kWh fully usable LiFePO4 energy storage
- 48V 100Ah rack mount battery design
- 4000 cycles at 80 percent depth of discharge
- Automatic internal heating down to -20°C
- Preloaded inverter protocols for easy integration
- LCD touchscreen for quick configuration
- 125A DC circuit breaker for enhanced protection
- Expandable up to 32 batteries in parallel
- 10-year manufacturer warranty
What Is Included
- FogStar ESR51.2V 5.12kWh rack battery
- RS232 to USB communication cable
- Positive 35mm battery cable
- Negative 35mm battery cable
Important Compatibility Notice
The FogStar ESR48V and ESR51.2V rack battery systems are not compatible with other rack battery brands or models. Differences in power ratings, dimensions, BMS communication, and system design may cause damage or unsafe operation.
Please do not attempt to connect this battery to any other make or model of rack battery. If you are unsure about compatibility or system design, contact our technical support team before purchasing.
Choose the FogStar 5.12kWh 48V LiFePO4 Rack Battery for dependable performance, long service life, and complete confidence in your energy storage system.
Specifications
xTechnical Specifications
| Manufacturer | FogStar Energy |
| Model | ESR51.2V 5.12kWh |
| Battery Chemistry | LiFePO4 |
| Cell Model | EVE LF100LA Grade A |
| Cell Configuration | 16S1P |
| Nominal Voltage | 51.2V |
| Capacity | 100Ah |
| Usable Energy | 5.12kWh |
| Maximum Discharge Current | 100A |
| BMS | PACE 100A |
| Balance Current | 0.5A |
| Cycle Life | 4000 cycles at 80 percent DOD |
| Rack Size | 3.5U |
| Dimensions | 450mm W x 160mm H x 440mm D |
| Weight | 45.2kg |
Return Policy
xWe offer a 14-day, no-quibble returns or replacement policy because we want you to be totally satisfied with your purchase.
If you are unhappy in any way with your purchase, you can return it for a refund or a replacement, as long as you return it in the same condition as it arrived (original/undamaged packaging and product) and within 30 days of receiving it. We will pay for your return postage on a faulty item as long as you send it using Royal Mail 2nd class recorded delivery (for EU or International Shipments, you have to use our UPS account, we will provide you with a return label)
Please keep in mind the following:
- Non-faulty items returned after 14 days and/or not in their original, undamaged packaging can only be exchanged for store credit - 15% off the items returned.
- Items returned within 14 days but not in their original and undamaged packaging will also incur a -15% charge per package.
- If you return an item that doesn't adhere to our returns procedure or doesn't include a returns form, you may be liable for a £10 administration fee
- Individual items from a bundle can't be returned, refunded or exchanged. If you want a refund/credit/exchange for a bundle, all items must be returned to us.
Before you return your item, please make sure that:
- You follow our returns process (outlined below)
- The goods and packaging are undamaged
IMPORTANT: We need to be able to identify an item with your order. We can only do this if you follow our returns process. Please do not send us items back that do not follow this process as they cannot be identified properly and will not be replaced or refunded.
What delivery method do I need to use when returning an item?
You must send the goods back to us via Royal Mail 2nd class recorded delivery. Refunds on faulty items returned are reimbursed within 5 working days.
Can I return just one item from multiple purchases?
Yes. Once you start the returns process you will go to a page that will allow you to choose which items you want to be replaced or refunded.
Returning faulty goods
If your item is faulty, you need to follow the returns policy, where you will be able to state that it’s faulty. The product will then arrive at our warehouse for testing.
If your purchase is not within 14 days
You can still exchange your item for a different product or for credit to use on the Voltacon Solar or Ledison-led-lights.co.uk websites (-15% from the credit amount).
Returns outside of the 14-day period do not qualify for the free returns policy.
Returning an item within the warranty
If you have a warranty and want to return a faulty item, you just need to follow our standard returns process. When we receive your item, we will then check that it’s within warranty and for any faults before arranging a replacement.