Patura Solar Panel 25W User Manual

The Patura Solar Panel 25W is a compact, high-efficiency monocrystalline solar panel designed for portable power applications, including RVs, boats, camping, and backup power systems. It features a durable, weather-resistant design with an IP65 rating, integrated junction box with bypass diodes, and MC4 connectors for easy setup. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: High-efficiency monocrystalline solar cells, Anodized aluminum frame, Tempered glass surface, IP65-rated junction box with MC4 connectors.

Installation

Unpack and inspect contents. Ensure all components are present and undamaged.

1. Choose Location: Select a location with maximum sunlight exposure throughout the day, free from shading (trees, buildings).
2. Mounting: Use the pre-drilled mounting holes on the aluminum frame. Secure with appropriate bolts, nuts, and washers. Ensure the panel is angled optimally (typically 15-40 degrees) facing true south (Northern Hemisphere) or true north (Southern Hemisphere).
3. Electrical Connection: Connect the panel's MC4 connectors to the corresponding MC4 connectors from your charge controller or extension cables. Ensure polarity is correct (female connector from panel to male connector to charge controller positive).
4. Grounding (if required): Connect the grounding lug on the frame to a proper earth ground using a copper grounding wire.

WARNING! Do not install during rain, snow, or high winds. Ensure the panel is securely mounted to prevent falling. Disconnect all electrical connections before handling.

First-Time Setup

After physical installation, configure your solar power system.

1. Connect to Charge Controller: First, connect the battery to the charge controller, then connect the solar panel to the controller. This sequence prevents voltage spikes.
2. Verify System Voltage: Ensure your charge controller and battery bank voltage (e.g., 12V, 24V) match the panel's nominal voltage (this panel is typically for 12V systems).
3. Check Connections: Ensure all MC4 connections are fully seated and weatherproof.
4. Monitor Initial Output: In full sunlight, check your charge controller display to confirm the panel is delivering power (voltage and current readings).

CAUTION! Never short-circuit the solar panel terminals. Avoid looking directly at the sun or reflective surface of the panel.

Specifications

• Maximum Power (Pmax): 25W
• Open Circuit Voltage (Voc): 21.6V
• Short Circuit Current (Isc): 1.45A
• Voltage at Pmax (Vmp): 18.0V
• Current at Pmax (Imp): 1.39A
• Maximum System Voltage: 600V DC (UL) / 1000V DC (IEC)
• Operating Temperature: -40°C to +85°C
• Power Tolerance: 0 ~ +3%
• Fire Rating: Class C (UL Standard)
• Wind Load: 2400Pa
• Snow Load: 5400Pa

Controls and Connections

The panel itself has no user controls. All system management is done via the connected charge controller. Key connection points are the MC4 connectors (positive and negative) exiting the junction box and the grounding lug on the frame.

Junction Box: Contains bypass diodes to minimize power loss from partial shading. Sealed to IP65 standards.

MC4 Connectors: Standard solar connectors. Ensure they are fully connected and the locking clips are engaged. Use a MC4 disconnect tool for safe disconnection.

Connecting to Charge Controllers & Batteries

This panel must be used with a compatible solar charge controller to regulate power to a battery.

1. Select a Charge Controller: Use a PWM or MPPT controller rated for your system voltage (e.g., 12V) and with a current rating higher than the panel's Isc (1.45A).
2. Connection Order: 1. Connect controller to battery. 2. Connect solar panel to controller.
3. Wiring: Use solar-rated cable of appropriate gauge for the run length between panel and controller to minimize voltage drop.
4. Fusing: Install an inline fuse (slightly higher than Isc) on the positive wire between the panel and controller for protection.

Tip: For multiple panels, consult your charge controller manual for series or parallel wiring configurations.

Operation & Performance

Optimal performance requires direct, unobstructed sunlight.

1. Daily Operation: The panel will automatically generate DC electricity when exposed to light. Output varies with sunlight intensity, angle of incidence, and temperature.
2. Monitoring: Monitor system health via your charge controller's display (voltage, current, battery status).
3. Seasonal Adjustment: Adjust the panel tilt angle seasonally for best annual yield (steeper in winter, shallower in summer).
4. Shading Avoidance: Even partial shading on one cell can significantly reduce total output. Keep the entire panel surface clear.

WARNING! The panel produces voltage whenever exposed to light, even on cloudy days. Treat connections as live at all times.

Maintenance & Storage

Regular maintenance ensures long-term performance.

Cleaning: Periodically clean the glass surface with water and a soft, non-abrasive cloth or sponge to remove dust, dirt, bird droppings, or snow. For stubborn residue, use a mild, non-abrasive detergent. Rinse thoroughly with water.

Inspection: Regularly inspect for physical damage (cracks in glass, frame corrosion), loose mounting hardware, and secure cable connections. Check junction box seal.

Storage: If storing long-term, store in a cool, dry place. Cover the panel surface to protect it. Disconnect from the system.

CAUTION! Do not use abrasive materials, harsh chemicals, or high-pressure water jets for cleaning. Do not walk on the panel.

Regulatory Information

This product complies with relevant international safety and performance standards. Patura is a registered trademark. The panel may be covered by patents. For support, visit www.paturasolar.com or contact customer service at 1-800-555-SOLAR. Dispose of electronic components according to local regulations.

Troubleshooting

Reset: Disconnect panel and battery from charge controller for 5 minutes, then reconnect in correct order.

Service: 1-800-555-SOLAR; www.paturasolar.com