Morningstar EcoPulse PWM 20amp
Morningstar EcoPulse PWM 20amp
12/24V 20A Solar Regulator with Fanless Cooling & Conformal Coating

DESCRIPTION
Morningstar EcoPulse 20A PWM Solar Charge Controller
Essential Battery Regulation for Off-Grid and Leisure Applications
The Morningstar EcoPulse 20A provides highly dependable pulse width modulation (PWM) solar charging for both 12V and 24V battery systems. Built as part of Morningstar's Essential Series, this robust solar charge controller is specifically engineered for off-grid residential setups, cabins, camper trailers, and marine environments. By ensuring your battery bank receives a precise and safely regulated charge, the EcoPulse maximises battery lifespan while protecting your critical power infrastructure from common electrical faults.
Advanced PWM Technology Versus Generic Alternatives
Unlike generic grade controllers that often rely on rudimentary relay switches, the EcoPulse utilises advanced pulse width modulation to deliver a smooth, tapered charge. This sophisticated regulation eliminates the risk of battery overcharging and significantly reduces the daily wear on your deep-cycle batteries. Heavy-duty connection terminals securely accommodate your solar, battery, and load wiring, reducing electrical resistance and mitigating the risk of terminal failure under high current loads.
Built Tough with Fanless Thermal Management
In remote environments, equipment failure is not an option. The EcoPulse stands out with its exceptional thermal design, utilising a rugged extruded aluminium heatsink that efficiently dissipates heat. This completely fanless architecture ensures silent operation and zero moving parts that could break or ingest dust. Furthermore, the internal circuit boards are conformally coated, providing a critical layer of protection against moisture, humidity, and coastal salt air. The outer shell consists of a high-strength polycarbonate case, adding structural durability against physical impacts.
Intelligent System Control and Fault Protection
Managing your power consumption is straightforward with the integrated adjustable load control. This solar controller protects your system by seamlessly managing low voltage disconnect scenarios, preventing the potentially fatal deep discharge of your battery bank. It also includes an automatic solar-based lighting control feature, allowing you to configure field-adjustable dusk-to-dawn settings for perimeter security or pathway lighting.
Safety is paramount in any 12V or 24V solar installation. The unit continuously monitors for short circuits, over-current events, and high-voltage scenarios, providing clear visual alerts via the intuitive LED fault indicators and three-stage battery state-of-charge lights.
Adaptable Settings for Various Battery Chemistries
Every off-grid system has unique requirements. The EcoPulse accommodates this with seven predefined charge settings and an additional custom profile accessible via integrated DIP switches. For users who prefer detailed telemetry, the controller is compatible with an optional multi-lingual digital meter interface, enabling precise metric displays and scroll-button adjustments. The device also includes an RTS port, allowing you to connect an optional Remote Temperature Sensor for highly accurate temperature-compensated charging, ensuring optimal battery health in fluctuating Australian climates.
Key Features
- Dual Voltage Compatibility: Automatically supports both 12V and 24V solar power setups with a 20A charge rating.
- Fanless Aluminium Heatsink: Superior heat dissipation for silent operation and extended component lifespan.
- Conformal Coating: Protects internal printed circuit boards from moisture and corrosion in demanding marine and coastal environments.
- Advanced Load Control: Prevents battery drain with precise low voltage disconnect regulation and automatic lighting capabilities.
- Comprehensive Fault Protection: Built-in safeguards against short circuits, high voltage spikes, and over-current faults.
- Clear LED Diagnostics: Easy-to-read three-stage battery state-of-charge indicators and dedicated error alerts.
Upgrade Your Off-Grid Power System
Equip your cabin, caravan, or marine vessel with industry-leading solar charging technology. Ensure your batteries are maintained in peak condition and your loads are safely managed. Add the Morningstar EcoPulse 20A to your setup today for reliable, long-lasting power regulation.
SPECIFICATIONS
Specifications
| Model | EC-20 |
|---|---|
| Controller Type | Pulse Width Modulation (PWM) |
| Built-in Meter | No |
| Charge Rating | 20 A |
| Load Current Rating | 20 A |
| Nominal Battery Voltage | 12 V or 24 V Auto-detect |
| Battery Voltage Range | 10-35 V |
| Voltage Accuracy | <= 0.1% +/- 50 mV |
| Max. PV Open Circuit Voltage (Voc) | 60 V |
| Self-Consumption | <15 mA |
| LED Indications | (1) Status, (3) Battery State Of Charge |
| Transient Surge Protection | 1500 W (solar, battery, load) |
| 4-Stage Charging | Bulk, Absorption, Float, Equalize |
| Temperature Compensation Coefficient | -30 mV/°C/12 V |
| Temperature Compensated Set-Points | Absorption, Float, Equalize, High Voltage Disconnect (HVD) |
| Low Voltage Disconnect / Low Voltage Reconnect | 11.4 V / 12.6 V or Custom (x2 for 24 V systems) |
| Lighting Settings | Dusk to Dawn |
| Electronic Protections | Solar Input: Overload, short-circuit, high voltage, reverse polarity, high temperature, nighttime reverse current; Load Output: Overload, short-circuit, high temperature, reverse polarity; Battery: Reverse polarity |
| Operating Temperature Range | -40°C to +45°C |
| Storage Temperature | -40°C to +80°C |
| Maximum Operating Altitude | 2000 m |
| Humidity | 100% Non-condensing |
| Tropicalization | Conformal Coating, Marine-rated Terminals |
| Dimensions (W x L x D) | 15.3 x 10.5 x 5.5 cm (6.0 x 4.1 x 2.2 in) |
| Enclosure | IP20, Type 1 |
| Power Terminals | 2.5 - 13.3 mm² / #14 - 6 AWG |
| Battery/Temp. Sense | 0.25 - 1.0 mm² / #24 - 16 AWG |
| Maximum Torque | 35 in-lb (approx. 3.95 N·m) |
| CE and RoHS Compliant | Yes |
| TUV Listed: IEC 62109 | Yes |
| Manufactured in a Certified ISO 9001 Facility | Yes |
| SKU: | SR-EC20 |
| Model #: | SR-EC20 |
| MPN: | SR-EC20 |














































