Description
xPylontech Fidus PRO 16kWh 51.2V LiFePO4 Solar Battery, IP65 with Self Heating
Large home energy storage usually means stacking four or five 48V modules, along with the busbars, link cables and communication leads that come with them. The Pylontech Fidus PRO takes a simpler route: 16.076kWh of usable LiFePO4 capacity in one weatherproof cabinet, capable of around 10kW continuous output when paired with a compatible hybrid or off grid inverter.
With integrated cell heating, an IP65 enclosure and a built in fire suppression module, it is designed for the places batteries often end up in real installations: garages, plant rooms, outbuildings and sheltered external walls.
Key Features
- 16.076kWh usable capacity from a single battery, with 100% depth of discharge
- 51.2V low voltage platform built on large 314Ah LFP cells
- 200A continuous discharge, 188A continuous charge, 300A peak for 15 seconds
- Around 10kW continuous and 15 kW short-duration power with a suitable inverter
- Self heating function allows charging in ambient temperatures down to minus 20°C
- IP65 enclosure with C5-M corrosion protection for indoor or outdoor mounting
- Active fire protection with continuous cell temperature monitoring
- CAN and RS485 communication for closed loop inverter control
- Touch display plus Bluetooth, Wi-Fi and LAN for local and remote monitoring
- Rated for 8,000 cycles at 25°C and 0.2C
- Expandable to 16 batteries per group, with larger systems via the Pylontech LV-HUB-V2-Pro
Product Overview
One cabinet instead of a battery stack. A single Fidus PRO holds the energy of several conventional 48V modules. Fewer units means fewer interconnections, fewer failure points and a cleaner installation, which matters to installers and homeowners alike. It suits properties with high evening demand, heat pumps, electric vehicle charging, or a solar PV system large enough to generate a meaningful surplus during the day.
Power that matches the capacity. Storing energy is only half of the job; the battery also has to deliver it quickly enough to run the house. With 200A available continuously and 300A for short bursts, the Fidus PRO can support several heavy loads at once, such as an oven, kettle and heat pump running together. This makes it a strong fit for whole house backup power, not just topping up self-consumption.
Winter charging without restrictions. Lithium iron phosphate cells should not be charged below 0°C. The Fidus PRO solves this with an intelligent heating system that warms the cells back into the safe charging range, working in ambient conditions down to minus 20°C. The BMS decides how to power the heater based on temperature, state of charge and whether solar or grid energy is available, and the heating parameters can be adjusted from the display or the Pylontech app.
Built for real installation locations. Indoor space is often the limiting factor for home battery storage. The IP65 rated cabinet resists dust and water jets, the C5-M rating protects against corrosive atmospheres, and the unit operates between 5% and 95% relative humidity (non condensing) at altitudes up to 4,000m. It can stand on the floor or be fixed to a wall. For outdoor sites, Pylontech requires the battery to be shaded from direct sunlight, and additional conditions apply in coastal locations.
Inverter integration. The 51.2V architecture and CAN or RS485 communication allow the Fidus PRO to work with a wide range of low voltage hybrid and off grid inverters, including many existing 48V systems being upgraded. Compatibility depends on the exact inverter model, firmware version and battery protocol, so please check the latest Pylontech compatibility list or contact our technical team before ordering. We are happy to confirm pairing with Voltacon inverters and other brands we supply.
Clear visibility of your stored energy. The integrated touch screen shows state of charge, voltage, current, temperature, state of health, alarms and charge history directly at the battery. Bluetooth covers local setup, Wi-Fi enables remote monitoring, and a wired LAN port is available where a stable connection is preferred.
Safety at every level. Protection starts with LFP chemistry, which is inherently more thermally stable than other lithium chemistries, and continues through the battery management system with short circuit, reverse polarity and thermal protection. An active fire protection module watches cell temperatures continuously and can trigger the integrated suppression system if an abnormal rapid temperature rise is detected.
Room to grow. Start with one 16kWh battery and add more as your energy needs increase. Up to 16 batteries can be combined in a group, and multi string systems can be built with the Pylontech LV-HUB-V2-Pro for larger residential or light commercial energy storage.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | Pylontech FB-L-16-Pro |
| Chemistry | LiFePO4 (LFP), 314Ah cells |
| Nominal voltage | 51.2V DC |
| Nominal and usable energy | 16.076kWh |
| Depth of discharge | 100% (default minimum SOC 5%, adjustable) |
| Charge voltage | 56.8 to 57.6V DC |
| Discharge voltage | 42.5 to 57.6V DC |
| Max continuous charge current | 188A |
| Max continuous discharge current | 200A |
| Peak current | 300A for 15 seconds |
| Power capability | Approx. 10kW continuous, approx. 15kW for 15 seconds |
| Communication | CAN, RS485 |
| Monitoring | Touch display, Bluetooth, Wi-Fi, LAN |
| Charge temperature | 0°C to +55°C (heating active from -20°C ambient) |
| Discharge temperature | -20°C to +55°C |
| Storage temperature | -20°C to +60°C |
| Cooling | Natural convection |
| Ingress protection | IP65 |
| Corrosion rating | C5-M |
| Protection class | Class I |
| Humidity | 5% to 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 (W x D x H) | 435 x 240 x 900mm |
| Weight | 122kg (±2kg) |
| Mounting | Floor standing or wall mounted |
| Expansion | Up to 16 batteries per group, up to 6 strings |
| Certifications | IEC 62619, IEC 63056, UN38.3, EMC/CE |
Applications
- Residential solar PV systems with hybrid inverters
- Off grid homes, cabins and remote properties
- Whole house backup power during grid outages
- Storing surplus daytime solar generation for evening use
- Time of use and dynamic tariff optimisation
- Properties with heat pumps or electric vehicle charging
- Retrofit upgrades to existing 48V and 51.2V battery systems
- Garage, outbuilding and sheltered outdoor installations
- Small commercial energy storage using multiple batteries
What Is Included
- 1 x Pylontech Fidus PRO 16kWh battery (FB-L-16-Pro)
Installation and Safety Notes
This battery must be installed and commissioned by a qualified electrician or solar installer in accordance with the Pylontech installation manual and the electrical regulations of the country of installation.
- At 122kg, the battery requires mechanical handling or a suitable team lift. Wall mounting must use fixings and a wall structure rated for the full load.
- DC cables, fuses or breakers and isolators must be sized for the currents involved, which reach 200A continuous and 300A peak.
- The battery is a Class I device and must be correctly earthed.
- Confirm inverter compatibility, firmware version and communication protocol before connection, and set the inverter battery current limits correctly.
- Outdoor installations must be protected from direct sunlight. Follow Pylontech's additional requirements for coastal or corrosive locations.
- Maintain the clearances specified in the manual to allow natural cooling and safe service access.
Warranty is provided in line with Pylontech's manufacturer terms. For system design advice or help pairing this battery with your inverter, please contact our technical team before ordering.
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 our UPS account (we will provide you with a return label)
Please keep in mind the following:
- 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 by a tracked/recorded delivery service. 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 website (-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.