Off-Grid Solar Charge Controller – Congsin 40A PWM with Display & USB for RVs, Trailers & Cabins

Congsin 40A PWM solar charge controller features automatic 12V/24V detection, a smart LCD screen, and dual USB outputs, ideal for off-grid solar energy systems.

Congsin 40A MPPT Solar Charge Controller – High-Efficiency 12V/24V Regulator for Off-Grid Use

Maximize solar output with real-time tracking and battery protection for your mobile or remote power system.

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🔋 Overview

Built for serious energy needs, the Congsin MPPT 40A solar charge controller efficiently regulates solar charging with Maximum Power Point Tracking (MPPT) technology. Supporting both 12V and 24V batteries automatically, it’s perfect for RVs, cabins, boats, and mobile workstations. Features include an LCD display for system monitoring and USB outputs for device charging.

🚀 Product Features

  • ✔️ MPPT charging for maximum panel efficiency and faster charging
  • ✔️ Auto-detects 12V or 24V battery systems
  • ✔️ Smart LCD display with operational feedback
  • ✔️ Dual USB charging ports for phones, tablets, and GPS devices
  • ✔️ Built-in safety: overcharge, over-discharge, reverse polarity & short circuit protection
  • ✔️ Excellent thermal design for durability in mobile and off-grid conditions

📊 Specifications

Model MPPT-40A
Rated Voltage 12V/24V Auto Switch
Max PV Input 50V
Charge Current 40A
USB Output 2 × 5V / 1A (Max 2.5A)
No Load Current ≤10mA
Operating Temp -35℃ to +60℃
Certifications CE / RoHS / FCC / LVD

🌎 Application Scenarios

  • ✔️ RV battery maintenance and off-grid solar charging
  • ✔️ Remote cottages, tiny homes, and backup power sheds
  • ✔️ Marine battery systems in boats and yachts
  • ✔️ Emergency solar kits for disaster preparedness

⚙️ OEM & Private Label Options

At Congsin, we support full OEM/ODM customization – from logo printing to firmware tweaks. Tailor our 40A solar controller for your business, distribution or installation needs.

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