Ensure your solar system performs safely and efficiently with the Solarmax 20A PWM Solar Charge Controller—a reliable and intelligent charge management solution engineered for small to medium-sized solar power setups. Whether you're running a solar-powered home, backup system, or remote off-grid installation, this 20-amp controller helps protect and regulate energy flow between your solar panel, battery, and load.

Equipped with Pulse Width Modulation (PWM) technology, the Solarmax 20A controller maximizes battery life by providing precise, multi-stage charging—bulk, absorption, and float. It intelligently adjusts charging levels based on battery voltage, reducing overcharging, deep discharge, and sulfation.

The unit supports both 12V and 24V automatic recognition, comes with an intuitive LCD display, and allows for real-time monitoring of voltage, current, battery level, and load status. With built-in safety features like over-voltage protection, reverse polarity protection, short circuit protection, and overload cut-off, this controller is designed to protect your valuable equipment and optimize system performance.

Its compact, rugged design makes it suitable for indoor and semi-outdoor environments, especially in rural, agricultural, and mobile solar use cases.

🧰 Key Features:

⚙️ PWM Charging Technology:

• Stable and efficient pulse width modulation for longer battery lifespan

• Reduces battery heating and improves charging precision

🔄 Automatic Voltage Detection:

• Auto-adjusts between 12V and 24V systems

• Simplifies installation and ensures compatibility with various battery types

📊 Multifunctional LCD Display:

• Displays real-time system status: voltage, current, battery charge level

• User-friendly navigation buttons for settings and load control

🔐 Intelligent Protection System:

• Overload, overcharge, short circuit, reverse polarity, and deep discharge protection

• Enhances safety and reliability of the solar setup

🔌 USB Output Ports (if applicable):

• Integrated 5V USB charging ports for mobile devices

• Powers small gadgets directly from your solar system

🧱 Compact & Durable Build:

• Heat-resistant ABS casing

• Wall-mountable or flat-surface installation

• Long service life under daily use conditions

🎯 Applications:

• 🏠 Small Solar Home Systems – Power lights, fans, radios, and small appliances

• 🏕️ Off-Grid Cabins & Rural Homes – Manage energy storage for solar setups in remote areas

• 🚐 Mobile Solar Installations – Ideal for vans, RVs, boats, and mobile clinics

• 🛠️ Solar Maintenance & Repair Kits – Excellent replacement controller for faulty systems

• 🌾 Agro-Solar Installations – For solar water pumps, fence chargers, and irrigation controls

• 💡 Emergency Backup Systems – Regulate and protect energy storage units in backup solar kits