Description
xPylontech Fidus Pro 20kWh LiFePO4 Battery System, Wi-Fi
4 x 5.12kWh Pylontech Fidus Pro Batteries with Self Heating, Wi-Fi Monitoring and IP65 Housing
The Pylontech Fidus Pro is the advanced evolution of the well known Pylontech US5000 and US5000C battery concept. This new generation low voltage LiFePO4 battery is designed for more demanding installations, offering a stronger IP65 housing, C5-M anti-corrosion protection, integrated Wi-Fi monitoring support and a smart self-heating function for cold weather operation. With 20kWh total nominal storage capacity from 4 x 5.12kWh batteries, this system is ideal for residential solar battery storage, off-grid systems, hybrid inverter installations, backup power and larger expandable energy storage projects.
Key Features
- 20kWh total nominal battery capacity using 4 x 5.12kWh battery modules
- 51.2V low voltage LiFePO4 battery technology
- Pro version with integrated smart self-heating function
- Operating temperature range from -20°C to 55°C
- IP65 rated enclosure for indoor, outdoor and harsher environments
- C5-M anti-corrosion protection for improved durability
- Wi-Fi monitoring support for remote visibility and battery data upload
- CAN and RS485 communication for compatible hybrid and off-grid inverters
- Advanced BMS protection with cell balancing and active safety management
- Expandable design with up to 20 batteries in one string, up to 6 strings supported with suitable system design and communication hub
- 8000 cycle life at 25°C / 0.5C according to manufacturer data
Product Overview
The Fidus Pro takes the proven Pylontech low voltage battery platform to the next level. Compared with traditional indoor rack batteries, it is designed for real world installations where moisture, dust, cold temperatures and harsher site conditions may be a concern. It combines high capacity lithium storage with a durable IP65 enclosure, C5-M anti-corrosion protection, smart heating and modern monitoring support, making it a strong choice for installers looking for a reliable battery solution for both indoor and protected outdoor applications.
The built-in self-heating function automatically manages heating when low temperature conditions are detected, supporting operation down to -20°C. According to manufacturer data, the battery can heat from -20°C to at least 5°C in approximately 2 hours, depending on available system power and site conditions.
The IP65 rated enclosure helps protect the battery against dust and water ingress, making it suitable for garages, utility rooms, outbuildings, workshops, plant rooms, covered outdoor areas and dusty or humid environments where standard indoor-only batteries may not be ideal. The C5-M anti-corrosion protection gives additional confidence in challenging environments, especially where humidity or corrosive conditions may affect standard battery housings over time.
Technical Specifications
| Specification | Value |
|---|---|
| Total nominal capacity | 20kWh (4 x 5.12kWh modules) |
| Nominal voltage | 51.2V |
| Battery chemistry | LiFePO4 (low voltage) |
| Continuous charge/discharge current | 100A per battery |
| Peak charge/discharge current | 120A for 2 minutes, 200A for 15 seconds |
| Operating temperature range | -20°C to 55°C |
| Enclosure rating | IP65 |
| Corrosion protection | C5-M rated |
| Communication protocol | CAN and RS485 |
| Monitoring | Wi-Fi module with Pylontech App support |
| Expandability | Up to 20 batteries per string, up to 6 strings with suitable system design |
| Cycle life | 8000 cycles at 25°C / 0.5C (manufacturer data) |
Weight, physical dimensions and certification details were not confirmed in the source specification. Please contact us if you need these figures before purchase.
Applications
- Residential solar battery storage
- Hybrid inverter systems
- Off-grid solar PV systems
- Backup power systems
- Garage, plant room and outbuilding installations
- Dusty, humid and harsher environments
- Commercial self-consumption systems
- Expandable battery banks for larger energy storage projects
What Is Included
- 4 x Pylontech Fidus Pro 5.12kWh LiFePO4 batteries
- Link power cables and communication cables
- 2 metre power cables for connection from the batteries to the inverter
- Wi-Fi module for access to the Pylontech App
- Ground metal mounting bracket
Installation and Safety Notes
This is a high capacity lithium battery system and must be installed by a qualified electrician or solar installer in accordance with local wiring regulations. Correct cable sizing, fusing, isolation, surge protection and earthing are essential for safe and reliable operation. Ensure the battery is installed on a suitable wall or floor mounting arrangement with adequate ventilation and clearance, and confirm compatibility with your inverter's communication protocol (CAN or RS485) before installation. Do not attempt to open, modify or repair the battery enclosure. For commercial installations, professional system design and commissioning is recommended.
Specifications
xTechnical Specifications – Pylontech Fidus Pro (FB-L-5.12-EU-Pro)
| Parameter | Value |
| Model | FB-L-5.12-EU-Pro |
| Battery chemistry | LiFePO4 (Lithium Iron Phosphate) |
| Nominal capacity | 5.12kWh |
| Nominal voltage | 51.2V |
| Rated capacity | 100Ah |
| Cycle life | 8000 cycles at 80% DoD |
| IP rating | IP65 |
| Anti-corrosion | C5-M |
| Self-heating | Yes (Pro version) |
| Operating temperature (with heating) | -20°C to +55°C |
| Communication | CAN, RS485 |
| Monitoring | Wi-Fi, LED, Bluetooth |
| Installation type | Floor-mounted vertical stack |
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.