SL-20L-12V Solar Charge Controller 12V 20A PWM

Description

The Morningstar SunSaver SL-20L-12V Solar Charge Controller is a high-performance 12V 20 Amp PWM controller designed for larger solar lighting and off-grid systems. In addition to regulating battery charging, this controller allows you to connect and control DC lighting loads directly, making it ideal for solar lighting applications.

With multiple programmable lighting modes, automatic dusk-to-dawn operation, and reliable performance in harsh environments, the SL-20L-12V is a dependable solution for demanding solar setups.

If you are working with a smaller system, see the 10 Amp solar charge controller.

Key Features

• 20 Amp PWM Controller – Designed for 12V solar battery systems
• Built-In Lighting Control – Connect and manage DC lighting loads directly
• 10 Lighting Modes – Includes programmable timer settings for flexible operation
• Three-Stage Lighting Cycle – Automatically controls lighting throughout the night
• Wide Temperature Range – Operates reliably from -40°C to +60°C
• Simple Setup – Easy to install and configure

Lighting Function

This controller includes a programmable lighting cycle with three stages:

1. On (After Sunset) – Lights turn on automatically at dusk
2. Off (Overnight) – Lights turn off during the night to conserve power
3. On (Before Sunrise) – Lights turn back on before dawn

Specifications

• System Voltage: 12V
• Charge Current: 20 Amps
• Controller Type: PWM
• Operating Temperature: -40°C to +60°C
• Data Sheet: SunLight Data Sheet (PDF)
• User Manual: SunLight Operating Manual (PDF)

Frequently Asked Questions

What is this solar charge controller used for?

The SL-20L-12V is designed for 12V solar systems, especially solar lighting applications. It regulates battery charging and allows direct control of DC lighting loads.

Can I connect lights directly to this controller?

Yes. This controller includes a load output, allowing you to connect DC lights and control them using built-in lighting modes and timers.

What does dusk-to-dawn operation mean?

The controller can automatically turn lights on at sunset and off at sunrise. It also supports programmable settings to turn lights off overnight and back on before dawn.

When should I choose a 20 Amp controller instead of a 10 Amp?

A 20 Amp controller is better suited for larger solar panels or systems with higher current requirements. If your system exceeds 10 Amps, upgrading to a 20 Amp controller ensures safe and efficient operation.

Is this controller suitable for Canadian weather?

Yes. It operates reliably in temperatures from -40°C to +60°C, making it suitable for outdoor use in harsh climates.

Can this controller be used with lithium batteries?

This controller is primarily designed for 12V lead-acid batteries (AGM, flooded, or gel). Always confirm compatibility with your specific battery type before use.