Morningstar Sunguard 12VDC PWM Charge Controller – SG-4 4.5A
MPN Number:
SG-4 4.5A
Morningstar SunGuard SG-4 4.5A 12VDC Charge Controller
The Morningstar Corporation SG-4 4.5A charge controller is an efficient and reliable solution for managing solar power systems. Designed specifically for 12-volt batteries, it delivers advanced PWM charging technology to ensure maximum energy delivery while safeguarding your solar investment. Whether used for off-grid applications or as a backup solution, this controller maximizes battery life and efficiency.
Product Features
Solid State Reliability
The Morningstar SG-4 Charge Controller features a 100% solid-state design, eliminating the need for mechanical relays. Its use of MOSFETs ensures reliable and swift switching with minimal wear over time.
Outdoor-Ready Wiring
Equipped with size #16 AWG wires and Hypalon insulation, the controller is prepared for outdoor environments, offering durable and weather-resistant performance.
Advanced Battery Regulation
The SG-4 utilizes advanced series PWM charge control, providing a seamless transition from 0 to 100% PWM duty cycle, ensuring efficient and stable charging of your batteries.
Temperature Compensation
Featuring an ambient temperature sensor, it adjusts the charging voltage by -28 mV per C, accommodating varying thermal conditions for optimum performance.
Reverse Current Protection
With built-in nighttime discharge protection, the controller prevents battery discharge through the solar array, eliminating the need for additional blocking diodes.
How It Works
The Morningstar SG-4 Charge Controller operates by intelligently managing solar input, battery charging, and system safety functions. It effectively maintains battery health and system efficiency, making it suitable for both technical and general users.
PWM Charging Technology
The core of the SG-4 is its PWM charging technology, which adjusts the charging current to maintain battery health and balance charging speed with longevity.
Environmental Adaptability
By using a built-in temperature sensor, the controller adapts the charging voltage according to real-time environmental conditions to optimize charge.
Reliable Performance
Its solid-state components and encapsulated design ensure that the SG-4 delivers consistent performance in varying environmental conditions, making it reliable for diverse applications.
Specifications
| System Voltage | 12 V |
| PWM Setpoint | 14.1 V |
| Max. Solar Voltage | 30 V |
| Rated Solar Input | 4.5 A |
| Max. Solar Short Circuit Rating | 5.5 A |
| Temperature Compensation | -28 mV/C |
| Operating Temperature Range | -40 to +60 C |
| Self-consumption | 6 mA |
| Reverse Current Leakage | <10 uA |
| Wire Size | #16 AWG |
| Dimensions | 6.4 x 5.1 x 3.8 cm / 2.5 x 2.0 x 1.5 in |
| Weight | 3 oz (0.09 kg) |
