Grecell S25 User Manual

The Grecell S25 is a high-performance portable power station designed for outdoor adventures, emergency backup, and off-grid power needs. Featuring a high-capacity lithium battery, multiple output ports (AC, DC, USB), pure sine wave inverter, MPPT solar charging, LCD display, and robust safety protections. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Devices 7. Charging & Power Management 8. Safety Features 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: High-capacity lithium battery pack, Pure Sine Wave AC Inverter, LCD Display Panel, Multiple output ports, Solar Charge Controller (MPPT), Car charging cable, AC power adapter.

Feature	Description
AC Output	Pure sine wave 300W continuous (600W surge)
DC Output	12V/10A car port for DC devices
USB Output	2x USB-A (5V/2.4A), 1x USB-C PD (18W)
LCD Display	Shows battery level, input/output power, warnings
Charging Methods	AC wall outlet, Solar panel (11-28V), Car charger
Battery Capacity	296Wh lithium-ion
Safety Protections	Overload, over-temperature, short circuit, low voltage
Power Button	Turns unit on/off
DC Button	Enables/disables DC output
AC Button	Enables/disables AC inverter output

Installation

Unpack and inspect contents. Place on stable, dry surface.

Initial Charge: Connect AC adapter to wall outlet and to S25's DC input port.
Connect solar panel: Use solar charging cable to connect panel to DC input port.
Connect car charger: Plug into vehicle's 12V cigarette lighter port.
Position unit: Ensure adequate ventilation; keep away from heat and moisture.

WARNING! Unit is heavy; lift with care to avoid injury. Ensure all connections are secure and dry.

First-Time Setup

Power on unit; observe LCD display.

Fully charge battery: Connect to AC power until LCD shows 100%.
Configure settings: Press and hold SET button to enter settings menu for brightness, auto-off timer.
Test outputs: Connect a small device to USB port to verify power delivery.
For solar: Ensure solar panel is oriented correctly and receiving sunlight.

CAUTION! Use only approved charging cables and accessories. Do not disassemble unit.

Specifications

Battery Capacity: 296Wh (80000mAh @ 3.7V).
AC Output: 300W continuous, 600W surge, pure sine wave.
DC Output: 12V/10A (max 120W).
USB Output: USB-A: 5V/2.4A each; USB-C PD: 5V/3A, 9V/2A, 12V/1.5A.
Input: AC adapter: 24V/3A; Solar: 11-28V/5A max; Car: 12V/8A.
Cycle Life: ≥500 cycles to 80% capacity.
Operating Temp: Charging: 0°C to 45°C; Discharging: -10°C to 45°C.
Weight: Approx. 3.5 kg (7.7 lbs).

Controls and Settings

Access settings via SET button. Front Panel: POWER, AC, DC, LCD display, USB ports, DC ports.

LCD Display Icons: Battery level, Input/Output power (W), Warning indicators (overload, high temp), Charging status.

Settings Menu: Press and hold SET for 3 seconds to enter. Options: LCD brightness (1-5), Auto-off timer (1-12 hours), Battery voltage display (V), Reset to factory defaults.

Connecting Devices

AC Devices: Plug into AC outlet (max 300W). DC Devices: Use car port (max 120W). USB Devices: Connect phones, tablets, lights.

Turn on S25 with POWER button.
Enable desired output: Press AC button for AC outlet, DC button for DC port.
Connect device cable to appropriate port.
Monitor LCD for power draw and battery level.

Tip: Check device power rating before connecting. Do not exceed total 300W output.

Charging & Power Management

Supports AC, solar, and car charging.

AC Charging: Use included adapter; full charge in ~6 hours.
Solar Charging: Connect compatible solar panel (11-28V, max 5A).
Car Charging: Plug into vehicle outlet while engine is running.
Charging Status: LCD shows input power and estimated time to full.
Battery Saver: Enable auto-off timer to conserve power.
Parallel Use: Cannot be connected in parallel with another unit.

WARNING! Use only approved solar panels. Do not charge in extreme temperatures.

Safety Features

Overload Protection: Automatically shuts off output if exceeded. Short Circuit Protection: Cuts power on short. Over-temperature Protection: Reduces output or shuts down if overheated. Low Voltage Protection: Turns off when battery drops below 10V to prevent damage.

Care & Maintenance

Store in cool, dry place. Clean with dry cloth; do not use liquids. Recharge every 3 months if storing long-term.

CAUTION! Do not expose to water or fire. Do not puncture or modify battery.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits. CE, RoHS compliant. Copyright © 2025 Grecell; trademarks of Grecell Technology Co., Ltd. For support, visit www.grecell.com or contact [email protected].

Troubleshooting

Symptom	Possible Cause	Corrective Action
Unit won't turn on	Battery depleted	Connect to AC power to charge; wait 5 minutes before turning on.
No output power	Output not enabled/overload	Press AC or DC button; check if overload icon shows; disconnect some devices.
Slow charging	Low input power	Ensure AC adapter is properly connected; use correct solar panel specifications.
LCD shows warning	Over-temperature/overload	Turn off unit, let cool, reduce connected load, restart.
Battery drains quickly	High load/old battery	Reduce connected power draw; if old, battery may need replacement.

Reset: Hold SET and POWER for 10 seconds to factory reset.

Service: [email protected]; www.grecell.com