W666-B Solar Charge Controller 40A Auto 12V-24V Built-in Off Grid
Price in Sri Lanka

The W666-B is a robust PWM solar charge controller designed for 12 V or 24 V battery systems. With a 40 A current rating and built-in LCD display, it supports medium to large off-grid setups including lighting, routers, and DC-powered appliances. Ideal for solar home systems, battery banks, and automation kits.

Specifications

• Controller Type: PWM (Pulse Width Modulation)
• System Voltage: Auto-detect 12 V / 24 V DC
• Rated Charge/Load Current: 40 A
• Battery Types Supported:
  - Sealed lead-acid (SLA)
  - Gel
  - Flooded
• Max PV Input Voltage: ≤ 50 V DC
• Self-Consumption: ≤ 10 mA
• Display: LCD with real-time voltage and status indicators
• Load Control Modes: Manual / timer / dusk-to-dawn
• Protection Features:
  - Overcharge
  - Over-discharge
  - Reverse polarity
  - Short circuit
  - Overload
• USB Output: Dual 5 V / 2 A ports (optional)

Features

• Auto voltage detection for 12 V and 24 V battery systems
• Suitable for medium to large solar setups and DC loads
• LCD interface for monitoring charge status and battery health
• Built-in protections for safe and reliable operation
• Ideal for routers, lighting, CCTV, and small DC appliances
• Common use cases:
  - Solar-powered backup systems
  - Garden and street lighting
  - Router and camera power supply
  - Small-scale irrigation and automation kits