Description
xPylontech Fidus PRO 16kWh Low Voltage Solar Battery
Built-in Fire Suppression and Heating Elements
The Pylontech Fidus PRO 16kWh battery is a new-generation low-voltage LiFePO4 energy storage system designed for residential solar, hybrid and off-grid applications. With 16.076kWh of usable energy contained in a single battery, the Fidus PRO provides a particularly high storage capacity without requiring multiple smaller battery modules.
Operating at a nominal 51.2V, this high-performance Pylontech solar battery combines large 314Ah LFP cells, high charge and discharge capability, intelligent battery management and extensive environmental protection. It is designed for homes that require substantial overnight energy storage, high backup power capability or greater independence from the electricity grid.
Key Features of the Pylontech Fidus PRO 16kWh Battery
- 16.076kWh usable battery capacity
- 51.2V nominal low-voltage architecture
- LiFePO4 LFP battery chemistry
- 314Ah high-capacity cells
- 100% Depth of Discharge capability
- 188A maximum continuous charging current
- 200A maximum continuous discharge current
- 300A peak charge/discharge current for up to 15 seconds
- Approximately 10kW continuous power capability per battery
- Up to 15kW short-duration power capability
- 8,000-cycle specification at 25°C / 0.2C
- Integrated low-temperature heating system
- IP65 weather-resistant enclosure
- C5-M anti-corrosion rating
- CAN and RS485 inverter communication
- Integrated touch display
- Bluetooth, Wi-Fi and LAN connectivity
- Built-in intelligent Battery Management System
- Integrated active fire protection
- Floor-standing or wall-mounted installation
- Indoor and outdoor installation capability
16kWh of Usable Energy in One Battery
One of the major advantages of the Pylontech Fidus PRO is its exceptionally high capacity. A single battery provides 16.076kWh of usable energy, reducing the number of individual battery modules required to build a large domestic energy storage system.
This makes the Fidus PRO particularly suitable for larger homes, properties with heat pumps, electric vehicles, high overnight electricity consumption and installations where a substantial amount of solar generation needs to be stored rather than exported to the electricity grid.
The battery supports 100% Depth of Discharge operation. Pylontech sets the default minimum State of Charge at 5%, which can be adjusted according to the requirements of the installation.
High Power for Demanding Household Loads
Battery capacity determines how much energy can be stored, but power capability determines how much equipment can be operated at the same time. The Fidus PRO has been designed for both.
Each 16kWh battery can provide approximately 10kW of continuous power and support approximately 15kW for short periods of up to 15 seconds when connected to a suitable inverter.
The battery provides up to 200A continuous discharge current and a 300A peak charge/discharge capability for 15 seconds. This makes the Fidus PRO particularly attractive for whole-house backup and high-power residential energy storage systems where several electrical loads may operate simultaneously.
Built-In Heating for Operation Down to -20°C
The FB-L-16-Pro incorporates an intelligent low-temperature heating system specifically designed for installations exposed to cold weather.
When the battery temperature falls below the normal charging range, the integrated heating system can warm the cells until their temperature rises above 0°C, allowing normal charging to resume. The heating function is available in ambient conditions down to -20°C.
This is a major advantage for UK and European installations where batteries may be installed in garages, external plant areas, outbuildings or suitable outdoor locations and experience very low winter temperatures.
The heating system intelligently evaluates battery temperature, State of Charge, charging and discharging status and the availability of an external energy source before determining how heating energy should be supplied.
Heating parameters can also be configured through the battery display or compatible Pylontech application.
IP65 Outdoor Solar Battery
The Pylontech Fidus PRO is suitable for both indoor and outdoor installation. Its IP65 enclosure provides protection against dust and water ingress, while the C5-M anti-corrosion rating provides additional protection for demanding environments.
The battery can operate in environments with 5% to 95% relative humidity without condensation and at altitudes of up to 4,000 metres.
This makes the Fidus PRO particularly useful where there is insufficient space inside the property for a large domestic battery system. Outdoor installations must still follow Pylontech's installation requirements, including protection from direct sunlight and the specified requirements for coastal locations.
Designed for Hybrid and Off-Grid Solar Inverters
The Fidus PRO uses the widely adopted 51.2V low-voltage battery architecture and provides CAN and RS485 communication interfaces for integration with compatible hybrid and off-grid solar inverters.
Pylontech batteries are used across a very wide range of solar inverter platforms. Depending on the individual inverter model, firmware and communication protocol, integration may be available with leading inverter manufacturers including:
- Victron Energy
- Deye
- Sunsynk
- Solis
- Growatt
- GoodWe
- LuxPower
- Voltronic Power
- Voltacon
- SMA
The battery communicates using CAN or RS485. Inverter compatibility should always be confirmed for the specific inverter model and firmware before installation. Where required, the inverter should be configured for lithium battery or Pylontech battery communication.
This broad low-voltage architecture makes the Fidus PRO an excellent choice for new installations as well as many upgrades to existing 48V and 51.2V hybrid or off-grid solar systems.
Ideal for Voltacon and Voltronic Solar Inverters
The Pylontech Fidus PRO is particularly well suited to high-capacity low-voltage solar storage systems using compatible Voltacon and Voltronic hybrid or off-grid inverter platforms.
Its 200A continuous discharge capability allows a single 16kWh battery to support substantially higher power than many traditional 48V battery modules, helping installers to build powerful systems using fewer individual batteries.
Always confirm communication protocol, inverter firmware, maximum battery current and the specific inverter model before commissioning.
Advanced Battery Management and Monitoring
An integrated intelligent Battery Management System continuously supervises the operation of the Fidus PRO battery.
The built-in touch display provides direct access to important operating information including:
- Battery State of Charge
- Battery voltage
- Charge and discharge current
- Battery temperature
- State of Health
- Charge and discharge history
- Operating status
- System alarms
Bluetooth provides convenient local connectivity while Wi-Fi enables remote monitoring and management. A LAN connection is also available where a stable wired network connection is preferred.
Integrated Active Fire Protection
Safety has been designed into the Fidus PRO at cell, battery and system level. The battery uses high-capacity 314Ah LFP cells combined with an advanced BMS, short-circuit protection, reverse-polarity protection and integrated thermal protection.
An active fire protection module continuously monitors cell temperatures. If abnormal rapid temperature increase is detected, the system can assess the risk and automatically activate its integrated fire suppression system.
Expandable 16kWh Battery Storage
The Fidus PRO can start as a single 16kWh residential battery and expand as the energy requirements of the property increase.
Up to 16 batteries can be configured within a battery group, while larger multi-string installations can use the Pylontech LV-HUB-V2-Pro for further expansion.
This makes the Fidus platform suitable not only for domestic solar storage but also for larger residential properties and higher-capacity energy storage projects.
Typical Applications
- Domestic solar PV energy storage
- Hybrid solar systems
- Off-grid solar installations
- Whole-house backup power
- Solar self-consumption
- Time-of-use electricity tariff optimisation
- Storage of surplus daytime solar generation
- Homes with heat pumps
- Homes with EV charging
- Large residential properties
- Outdoor battery installations
- Garages and outbuildings
Why Choose the Pylontech Fidus PRO?
The Pylontech Fidus PRO combines the capacity normally associated with a multi-battery system into a compact 16kWh low-voltage battery. High current capability, 100% Depth of Discharge, intelligent monitoring, flexible expansion and integrated low-temperature heating make it particularly attractive for modern residential solar installations.
For properties requiring substantial solar storage, whole-house backup or year-round outdoor battery operation, the Fidus PRO provides a powerful and highly integrated alternative to installing multiple smaller 48V battery modules.
Specifications
xTechnical Specifications
| Model | Pylontech FB-L-16-Pro |
| Series | Fidus Battery Plus |
| Battery Chemistry | LiFePO4 / LFP |
| Nominal Voltage | 51.2V DC |
| Nominal Capacity | 16.076kWh |
| Usable Capacity | 16.076kWh |
| Depth of Discharge | 100% |
| Charge Voltage | 56.8 - 57.6V DC |
| Discharge Voltage | 42.5 - 57.6V DC |
| Maximum Continuous Charge Current | 188A |
| Maximum Continuous Discharge Current | 200A |
| Peak Current | 300A for 15 seconds |
| Continuous Power Capability | Approx. 10kW |
| Short-Duration Power Capability | Approx. 15kW for 15 seconds |
| Communication | CAN / RS485 |
| Charging Temperature | 0°C to +55°C |
| Heating Model Charging | Heating function available above -20°C ambient conditions |
| Discharge Temperature | -20°C to +55°C |
| Storage Temperature | -20°C to +60°C |
| Cooling | Natural cooling |
| Protection Class | Class I |
| Enclosure Rating | IP65 |
| Anti-Corrosion Rating | C5-M |
| Humidity | 5% - 95% RH, non-condensing |
| Maximum Altitude | 4,000m |
| Cycle Life | 8,000 cycles at 25°C / 0.2C |
| Design Life | 10 years at 25°C |
| Dimensions | 435 × 240 × 900mm |
| Weight | 122 ±2kg |
| Installation | Floor standing or wall mounted |
| Maximum Batteries Per Group | 16 |
| Maximum Strings | 6 |
| Certifications | IEC 62619, IEC 63056, UN38.3, EMC/CE |
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.