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Morningstar Charge Controller 20А SS20L-12V

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Battery compatibilityLead acid
Controller typePWM Charge Controllers
Maximum charging current20 A
Dimensions LxWxH1.75" x 2.5" x 7"
Weight0.57 lbs
ManufacturerMorningstar Corp
Manufacturer Part #SS20L-12V
Operating Temperatures –40 °C to +60 °C
Delivery Time 5-7 Business Days
Special FeaturesSealed / Flooded battery Select

About product

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

SunSaver’s technology provides:

  • Exceptional Reliability
  • PWM Battery Charging
  • Consistent High Quality


  • 100% solid state
  • Series design (not shunt)
  • True 0 to 100% PWM duty cycle
  • Setpoint accuracy to 35 mV
  • 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
  • Approved for use in hazardous locations - Class 1, Division 2, Groups A, B, C, D
  • ISO 9002 quality programs

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.

Morningstar, SunSaver Charge Controller, 20A, 12VDC, with Low Voltage Disconnect, SS20L-12V

Reviews & Questions

  • Reviews (3)
  • Questions (2)
Very easy to install + flawless performance. there’s no digital read-out, but I don't have time to stare at it anyway. I use a multimeter to check it every now and then and it is ideal every single time
Cory Camallieri
08/17/2021 01:00 pm
I purchased 4 inexpensive solar charge controllers in the past. None of them lasted beyond five or six months. I decided to spend more hoping for a longer lifespan, and I am very happy I did!
07/23/2021 06:12 pm
I got the Morningstar SunSaver because I wanted a controller that had a more industrial design and was easy to read at a glance. The other controllers I have seen seemed inadequate or low-quality.
07/06/2021 03:59 pm

Leave a review

Correction the max input voltage is 32.7v is this controller rated for this? Jeff.
06/27/2019, 13:29
I would not recommend using this controller with your setup.
I am getting 2 300w Canadian Solar panels the voltage on each is max 32v. I will be charging 2 batteries each one with a controller because I have a 12-120 v inverter. Is this charge controller rated for 32v input?
Jeff Nettleton
06/27/2019, 13:23
Its rated for Max. solar voltage 30 volts.