20A PWM Solar Charge Controller - Waterproof Smart Charger for Multiple Battery Types

The 20A PWM Solar Charge Controller is a compact and innovative device designed to ensure the longevity and safety of your batteries. Utilizing MOSFET technology and intelligent charging management, this controller is versatile enough to support various lead-acid and LiFePO4 battery types. Its waterproof design and user-friendly features make it ideal for reliable outdoor use.

Benefits

• Extends battery lifespan by expertly managing charging stages and compensating for temperature variations.
• Minimizes maintenance time with automatic control and clear LED indicators for easy status monitoring.
• Simplifies installation to make it quick and safe with common positive grounding and durable connectors.
• Ensures consistent outdoor performance with IP65 waterproofing and a conformal PCB coating to resist moisture.
• Conserves battery power overnight with low standby current, keeping capacity available for essential use.

Features

• Efficient PWM charging through advanced MOSFET switching technology.
• Simple connection with common positive grounding.
• Customizable battery type selection via DIP switch for compatibility with Flooded, AGM, GEL, and LiFePO4 batteries.
• Multi-stage smart charging control for optimal battery management and equalization options.
• Intuitive LED indicators showing battery health and charging status.
• Built-in thermal protection and automatic shutdown if temperatures exceed safe levels during charging.
• Protects against overvoltage, short circuits, and reverse polarity to enhance safety.
• No-spark operation with corrosion-resistant terminals and connectors for durability.
• Moisture-resistant internal board with conformal coating.
• Optional port for connecting an external battery temperature sensor.
• Robust waterproof IP65-rated enclosure ensuring reliability in tough environments.
• Manufactured to meet CE/EMC and FCC standards for quality assurance.

Specifications

• Electrical Parameters:
  • Rated solar panel current: Max. 20 A
  • Normal input solar array voltage: 15–22 VDC
  • Maximum solar array open-circuit voltage: 25 VDC
  • Lowest operating voltage: 8 VDC
  • Standby current consumption: 5 mA at night
  • Maximum voltage drop from solar panel to battery: 0.25 VDC
• Charging Characteristics:
  • Minimum battery start charging voltage: 3 VDC
  • Soft start charging voltage range: 3–10 ±0.2 VDC
  • Soft start charging current: Up to 10 A
  • Equalization charging voltage at 25 °C: 15.5 ±0.2 VDC
  • Equalization charging timer timeout: 2 hours
  • Battery temperature compensation coefficient: -24 mV/°C
  • Temperature compensation range: -4 °F to +122 °F (-20 °C to +50 °C)
• Protection Features:
  • Overvoltage protection
  • Short circuit protection
  • Reverse polarity protection
  • Over-temperature protection during charging: 149 °F (65 °C)
• Electrical Parts:
  • Input/output terminals: M5 terminals
• Physical Parameters:
  • Controller material: Standard ABS plastic
  • Maximum stranded wire size for power terminal: #10 AWG (5 mm²)
  • Mounting: Vertical wall mounting with included plastic spacers and self-tapping screws for easy setup
  • Ingress protection: IP65 (waterproof)
  • Net weight: Approx. 0.3 kg (0.66 lb)
• Environmental Characteristics:
  • Operating temperature range: -25 to 50 °C (-13 to 122 °F)
  • Storage temperature range: -40 to 85 °C (-40 to 185 °F)
  • Operating humidity level: 100% (no condensation)
• Compatibility & Standards:
  • Compatible with rechargeable lead-acid batteries (Flooded, AGM, GEL) and Lithium (LiFePO4)
  • Optional port for external battery temperature sensor
  • CE, EMC, and FCC compliance certifications