Morningstar SS-20L-12V SunSaver Solar Controller 20A 12VDC

Morningstar SS-20L-12V SunSaver Solar Controller 20A 12VDC

Morningstar's SunSaver™ is the world's leading small solar charge controller for both professional and consumer applications including standard features and capabilities not found in any other small PV controller.

• Exceptional Reliability
• PWM Battery Charging
• Consistent High Quality

The SunSaver’s advanced design delivers outstanding performance and value. The SunSaver’s low cost is made possible by Morningstar’s unique approach to design and manufacturing:

• Automated production
• ISO 9002 quality programs
• Latest power electronic technologies
• Latest control and logic technologies
• High volume manufacturing

• 20A Rated Solar Current at 12VDC with Low Voltage Disconnect
• Small system charge controller
• May be used in parallel for higher current
• 5 Year Warranty
• 100% solid state
• Series design (not shunt)
• True 0 to 100% PWM duty cycle
• Setpoint accuracy: +/- 25mV
• Rated for 25% overloads
• Fully encapsulated in epoxy potting
• Marine rated terminals / anodized case
• Temperature compensation
• Sealed / Flooded battery select
• No need to derate
• Parallel for 40 amps or more
• Green charging / Red LVD indicators

• Wire size #10 AWG (5.2 mm2)
• Anodized aluminum case
• Marine rated terminals
• Epoxy encapsulated
• Weight is 8 oz (0.23 kg)

Morningstar String Calculator
The Morningstar String Calculator will help you decide how many PV modules you may use in series and parallel with a Morningstar charge controller.

Other brands survive harsh conditions. Morningstar thrives in them.

With more than 25 years of experience and well over four million products in over 100 countries – most of them still in operation – Morningstar has truly earned its reputation for building the “world’s leading solar controllers.” At Morningstar, the word “reliability” means a lot more than a marketing adjective. Morningstar’s employee-owned culture works hard to maintain the lowest hardware failure rate in the industry, because our own reputations literally ship with every product.

That’s why system designers of the most mission-critical solar energy installations around the world insist on Morningstar components, and why you should too on your next project. From mineral mines in South America to telecom repeater stations in Canada, from gas wells in the Middle East to mountain peaks in Nepal, Morningstar technology and legendary quality make the difference between success and failure – and make renewable energy a practical, cost-effective, and long-term solution.

FAQs

• What is Low Voltage Disconnect (LVD)?
  The LVD/LVDR function of Morningstar controllers is designed to protect system batteries from overdischarge and (to a lesser extent) protect sensitive system loads from low battery voltage. When the battery drops to the LVD threshold, loads connected to the controller are shut OFF to give the batteries time to recover their charge. When the battery voltage rises above the LVDR threshold, loads that were previously disconnected are turned back ON. Low Voltage Disconnect/Reconnect does not affect the controller’s charging ability; charging continues whether in the disconnected state or in the connected state.

• Morningstar SunSaver Datasheet
• Morningstar SunSaver Operator's Manual
• Morningstar SunSaver Bench Testing Procedures
• Morningstar SunSaver Field Testing Procedures
• Morningstar Charging Isolated Battery Banks
• Morningstar Charging Isolated Battery Banks – 1 Solar Array
• Morningstar Diagram: Paralleling
• Morningstar Diagram: Inverter Wiring
• Morningstar Load Control with a Relay
• Morningstar Load Control with Sure Sine Inverter
• Morningstar Parallel Battery String Wiring
• Morningstar SunSaver Gen3 Upgrade Overview
• Morningstar SunSaver Generation Differences
• Morningstar SunSaver vs SHS Comparison Chart
• Morningstar Declaration of Conformity for Products Under 48V
• Morningstar SunSaver Gen3 Declaration of Conformity
• Morningstar SunSaver Hazardous Locations Certification
• Morningstar SunSaver UL1741 Certification
• Morningstar PWM vs MPPT
• Morningstar SunSaver Gen3 Load Overcurrent Short Circuit Protection
• Morningstar What is Class 1, Division 2, Classification
• Morningstar Why PWM?
• Morningstar SunSaver Gen3 Electrical Diagram
• Morningstar Product Accessory Compatibility Matrix

Solar application utilizing a Morningstar SunSaver-6 solar controller to illuminate art sculptures. Photo courtesy of Mark Fiore.