25A 52.2V Charger for Lithium LiFePo4 15S Pylontech Battery

25A 52.2V Intelligent Charger for 48V Batteries

Compatible With: Pylontech US2000 / US3000 / US5000

✅ 12-Month Warranty
✅ Recovers Batteries in Low SOC / Alarm State

Why You Need This Charger

If your system is showing a red Alarm LED or your inverter has shut down due to low battery voltage, this charger provides the power needed to safely bring your Pylontech battery back online. It’s ideal for winter months when solar generation dips, and regular use helps keep your batteries balanced and healthy.

This high-current model is especially useful for installers who need to bring new batteries up to 100% SOC before commissioning them into an existing system. It’s also popular with users charging from a generator, alternative grid supply, or van conversions with access to shore power.

Key Features

🔋 Optimised for Pylontech Batteries

Engineered specifically for 15-series LiFePO₄ battery packs, this charger delivers a controlled 52.2 V at up to 25 A, making it ideal for 48 V battery systems.

Unlike many off-the-shelf chargers that default to 53.2 V, this charger intentionally limits the voltage to 52.2 V. This lower, more conservative setpoint reduces the risk of individual cell overvoltage, helping to prevent BMS overvoltage alarms, unnecessary battery shutdowns, and long-term cell stress.

The result is a safer, more stable charge profile that prioritises battery longevity and system reliability—particularly important for recovery charging, maintenance charging, and winter operation where batteries may be at low state of charge.

🛡️ Built-In Protection System

Reverse polarity, short circuit, overvoltage, overcurrent, thermal, and low-voltage protection — keeping both your charger and battery safe.

⚡ Pre-Charge Recovery Mode

Safely wakes up deeply discharged batteries and reactivates the BMS.

🌡️ High Efficiency, Low Standby Draw

Up to 90% efficiency at 220V with minimal wasted power.

💧 IP66 Weatherproof Aluminium Housing

Dustproof, waterproof, and durable enough for workshop, garage, or van installations.

🤖 Smart Charging Logic

Constant Current (CC) → Constant Voltage (CV) → Automatic Cut-Off when full.

Technical Specifications

• Input Voltage: 90–260V AC (47–63Hz)
• Max Output Power: 1250W
• Output Voltage: 52.2V
• Output Current: 25A
• Protection Rating: IP66
• Operating Temperature: -20°C to +65°C
• Weight: 3.2kg

🔌 Generator Size Recommendation

Because the charger can draw up to ~1250 W at full output and generators don’t run perfectly at peak efficiency, you want headroom above that

✅ Minimum recommended generator size: 2 kW (2000 W)
✅ Better choice for reliability & extra capacity: 2.5 kW–3 kW

Intelligent Charging Stages

1. Pre-Charge Mode – Gently activates a deeply discharged battery.
2. CC Stage – Charges at a steady 25A.
3. CV Stage – Holds voltage at 52.2V while current tapers down.
4. Auto Cut-Off – Stops charging when full, protecting battery lifespan.

Safety & Reliability

✔ Overvoltage / Overcurrent Protection
✔ Short-Circuit & Reverse Polarity Protection
✔ Thermal Management – Reduces current at 80°C, shuts down at 90°C, restarts at 60°C
✔ Leakage & Insulation Protection
✔ Meets CE & LVD Electrical Safety Standards
✔ MTBF: 10,000+ hours

What’s Included

📦 25A Intelligent Charger
📦 1.5m AC Power Cable
📦 DC Output Cable with Surlock Plugs
📦 User Manual

1-Year Warranty – Fast UK Dispatch – In Stock & Ready to Ship