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Overview:
The 10A PWM Solar Charge Controller is a compact and intelligent power management solution for small off-grid solar systems. Designed to efficiently charge 12V or 24V lead-acid batteries, it uses pulse width modulation (PWM) technology to prolong battery life and optimize performance. With integrated battery protection, customizable settings, and a user-friendly interface (often with an LCD display), it ensures safe, reliable operation for a wide range of DC applications—from RVs and boats to garden lights and sheds.
Key Features:
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✅ PWM Charging Technology
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Multi-stage algorithm: Bulk → Absorption → Float
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Enhances battery health and charge efficiency.
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✅ Automatic Voltage Detection
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Auto-detects 12V or 24V systems (on most models).
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✅ Complete Battery Protection
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Overcharge Protection
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Over-Discharge / LVD (Low Voltage Disconnect)
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Reverse Polarity Protection (Solar & Battery)
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Short Circuit Protection (Load & Battery)
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Overload Protection (Load output)
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✅ LCD Display or LED Indicators (varies by model)
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Displays system metrics: solar voltage, battery voltage, charge/discharge current, load status, battery state, temperature, and error codes.
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✅ User-Adjustable Charging Parameters
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Customize float voltage, LVD, and LVR thresholds for battery types like GEL, AGM, or Flooded Lead-Acid.
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✅ Load Control Features
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Power DC loads via dedicated terminals
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Modes include: Dusk-to-Dawn, Timed, or Manual On/Off
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✅ Temperature Compensation
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Adjusts voltage setpoints based on ambient temperature for optimal charging (often internal or via sensor port).
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✅ Dual USB Ports (on many models)
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Charge mobile devices directly with 5V USB outputs (typically 1–2.4A total).
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✅ Low Power Consumption
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Self-consumption as low as <10mA, preserving stored energy.
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✅ Compact, Durable Design
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Easy installation, ideal for indoor setups or protected outdoor enclosures.
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Applications:
Perfect for powering small DC systems in:
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🔋 Cabins, Sheds & Off-Grid Buildings
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🚐 RVs, Campers & Caravans
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🛥️ Boats, Marine Installations
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🌄 Remote Lighting (Street/Garden/Security)
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📡 Telemetry, Sensors & Remote Monitoring Systems
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🚧 Electric Fences, Gates, & DIY Solar Projects
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📱 Charging Devices via USB
Specifications (Typical):
| Parameter | Details |
|---|---|
| Model Type | PWM Solar Charge Controller |
| Rated Charge/Load Current | 10A |
| System Voltage | 12V / 24V DC (Auto-select or manual) |
| Max PV Input Voltage (Voc) | Up to 25V (12V system) / 50V (24V system) |
| Recommended PV Power | 120W–150W (12V) / 240W–300W (24V) |
| Battery Types Supported | Lead-Acid (GEL, AGM, Flooded). Some may support Lithium. |
| Charging Algorithm | PWM – Bulk, Absorption (Boost), Float |
| Float Voltage | ~13.7V / 27.4V (adjustable) |
| Overcharge Protection | ~14.4V / 28.8V (adjustable) |
| Low Voltage Disconnect (LVD) | ~10.7V / 21.4V (adjustable) |
| Low Voltage Reconnect (LVR) | ~12.6V / 25.2V (adjustable) |
| Self-Consumption | <10mA to <30mA |
| Operating Temp. Range | -20°C to +55°C |
| Temp. Compensation | -3mV/°C/2V (typical) |
| Wire Terminals | Screw type (supports AWG 10–12 / 4–6mm²) |
| USB Ports (if equipped) | Dual 5V outputs (1A to 2.4A total) |
| Enclosure Protection | IP20–IP32 (indoor-rated) |
| Dimensions | ~130mm x 70mm x 35mm |
| Weight | ~100g – 250g |
Important Usage Notes:
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🔋 Always connect the battery before the solar panel.
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⚠️ Do not exceed the controller’s rated current or max input voltage.
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🔧 Fuse protection is recommended on the battery and solar panel inputs.
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🌬️ Install in a ventilated, dry area—unless the unit is IP-rated for outdoor use.
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📖 Refer to the manufacturer’s manual for wiring diagrams, installation instructions, and specific model behavior.
Conclusion:
The 10A PWM Solar Charge Controller is a reliable, intelligent solution for powering small to medium off-grid solar applications. With essential protections, clear monitoring options, and smart charging algorithms, it helps you get the most from your solar system while protecting your batteries and loads.
