
SunSaver™ Models

Morningstar SunSaver Charge Controllers
The Industry Standard for Off-Grid Solar System Battery Charging
Morningstar SunSaver & Sunlight Charge Controllers represent the industry standard for reliable solar battery charging in demanding off-grid applications worldwide. With over 1.5 million SunSaver controllers deployed across 90 countries since 1996, these proven PWM charge controllers deliver exceptional performance in mission-critical installations from oil and gas operations to residential solar systems.

Sunlight™ Models
Morningstar SunSaver Charge Controller Models & Specifications
SunSaver Model | SS-6-12V | SS-6L-12V | SS-10-12V | SS-10L-12V | SS-10L-24V | SS-20L-12V | SS-20L-24V |
---|---|---|---|---|---|---|---|
Charge Rating | 6 amps | 6 amps | 10 amps | 10 amps | 10 amps | 20 amps | 20 amps |
Max. PV Open Circuit Voltage (Voc) | 30 volts | 30 volts | 30 volts | 30 volts | 60 volts | 30 volts | 60 volts |
Nominal Battery Voltage | 12V | 12V | 12V | 12V | 24V | 12V | 24V |
Minimum Battery Voltage | 6V* | 6V* | 6V* | 6V* | 6V* | 6V* | 6V* |
Load Control | No | ✓ Yes | No | ✓ Yes | ✓ Yes | ✓ Yes | ✓ Yes |
Voltage Accuracy | +/- 25mV | +/- 25mV | +/- 25mV | +/- 25mV | +/- 48mV | +/- 25mV | +/- 48mV |
Operating Temperature Range | -40°C to +60°C | -40°C to +60°C | -40°C to +60°C | -40°C to +60°C | -40°C to +60°C | -40°C to +60°C | -40°C to +60°C |
Warranty | 5 Years | 5 Years | 5 Years | 5 Years | 5 Years | 5 Years | 5 Years |
CE and RoHS Compliant | ✓ Yes | ✓ Yes | ✓ Yes | ✓ Yes | ✓ Yes | ✓ Yes | ✓ Yes |
TAA Compliant | ✓ Yes | ✓ Yes | ✓ Yes | ✓ Yes | ✓ Yes | ✓ Yes | ✓ Yes |
Hazardous Locations: Class 1, Division 2, Groups A-D | ✓ Yes | ✓ Yes | ✓ Yes | ✓ Yes | ✓ Yes | ✓ Yes | ✓ Yes |
UL-1741 and Canadian CSA Listed | ✓ Yes | ✓ Yes | ✓ Yes | ✓ Yes | ✓ Yes | ✓ Yes | ✓ Yes |
FCC Class B Part 15 Compliant | ✓ Yes | ✓ Yes | ✓ Yes | ✓ Yes | ✓ Yes | ✓ Yes | ✓ Yes |
ISO 9001 Certified Facility | ✓ Yes | ✓ Yes | ✓ Yes | ✓ Yes | ✓ Yes | ✓ Yes | ✓ Yes |
*In periods following excessive battery drain, provided the controller is not power cycled, the controller can self-recover from a battery voltage of 1V and provide intermittent charging operation up to 6V at which normal operation will resume.
Morningstar SunLight Charge Controller Models & Specifications
Model | SL-10L-12V | SL-10L-24V | SL-20L-12V | SL-20L-24V |
---|---|---|---|---|
Charge Rating | 10 amps | 10 amps | 20 amps | 20 amps |
Max. PV Open Circuit Voltage (Voc) | 30 volts | 60 volts | 30 volts | 60 volts |
Nominal Battery Voltage | 12V | 24V | 12V | 24V |
Minimum Battery Voltage | 6V | 6V | 6V | 6V |
Voltage Accuracy | +/- 25mV | +/- 48mV | +/- 25mV | +/- 48mV |
Operating Temperature Range | -40°C to +60°C | -40°C to +60°C | -40°C to +60°C | -40°C to +60°C |
Warranty | 5 Years | 5 Years | 5 Years | 5 Years |
CE and RoHS Compliant | ✓ Yes | ✓ Yes | ✓ Yes | ✓ Yes |
TAA Compliant | ✓ Yes | ✓ Yes | ✓ Yes | ✓ Yes |
Manufactured in a Certified ISO 9001 Facility | ✓ Yes | ✓ Yes | ✓ Yes | ✓ Yes |
MorningStar SunSaver Charge Controller Review
The Morningstar SunSaver series has earned its reputation as the industry standard through exceptional real-world performance and reliability. With over 1.5 million units deployed across 90 countries since 1996, these controllers maintain an impressive failure rate of less than 0.1% in demanding applications ranging from remote oil and gas installations to residential off-grid systems. Professional installers consistently choose SunSaver controllers for mission-critical applications where failure simply isn't an option, from mining operations in extreme climates to telecommunications infrastructure in remote locations.
The solid-state power MOSFET design eliminates mechanical relay failures while delivering precise 4-stage PWM charging with temperature compensation to extend battery life. The extruded aluminum enclosure with integrated heat sink management, combined with epoxy encapsulation and marine-rated terminals, enables reliable operation from -40°C to +60°C in harsh field conditions. Factory pre-configuration eliminates installation complexity, while comprehensive electronic protections against overload, short-circuit, reverse polarity, and transient surges protect both the controller and connected equipment.

Proven Reliability
Over 1.5 million controllers sold worldwide with less than 0.1% failure rate. Trusted in mission-critical applications across 90 countries since 1996.
4-Stage PWM Charging
Advanced pulse width modulation with bulk, absorption, float, and equalize stages extends battery life through precise temperature-compensated charging.
Comprehensive Protection
Full electronic protections against overload, short-circuit, reverse polarity, high temperature, lightning, and transient surges on all connections.
Extreme Temperature Range
Operates reliably from -40°C to +60°C with marine-rated terminals and tropicalized design for harsh field conditions.
Hazardous Location Certified
UL/CSA Class 1 Division 2 and ATEX/IECEx Zone 2 approvals for safe operation in oil, gas, and mining environments worldwide.
Easy Installation
Factory pre-configuration eliminates setup requirements. Electronic protections prevent damage from wiring mistakes during installation.
Intelligent Lighting Control
SunLight models feature 10 programmable lighting options with microcontroller precision for solar lighting applications.
Solid-State Design
100% solid-state power MOSFET technology with no mechanical relays ensures long-term reliability and silent operation.
SunSaver Solar Charge Controllers Rated for Hazardous Locations
Learn more about the HazLoc ratings and internal and external components of Morningstar’s SunSaver Solar Charge Controllers
Agricultural
Automation
Environmental
Lighting
Mining
Oil and Gas
Railroad
Residential
Rural Power
RV & Marine
Security
Telecom
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