Morningstar provides load control options through solar controllers with built-in load control and stand-alone load control devices. Some controllers have load control presets and others also include programmable settings. The following is a list of all Morningstar products that can be used for load control.

Solar Controllers with built-in Load Control (12 and 24V only)

GenStar MPPT (30A load control rating; Integrated Series product compatible with ReadyRelay

Programmable with LiveView 2.0 or built-in display

Presets: LVD = 11.1-12.85V, LVR = 12.6-13.3V (x2 for 24V, x4 for 48V)

ProStar MPPT (15-30A load circuit ratings) Programmable with MSView or display model

Presets: LVD = 11.5V, LVR = 12.6V (x2 for 24V); Firmware v27 and higher

ProStar (PWM) (15-30A load circuit ratings) Programmable with MSView or display model

Preset: LVD = 11.5V, LVR = 12.6V (x2 for 24V); Firmware v18 and higher

SunSaver MPPT (15A load circuit ratings) Programmable with MSView

Presets: LVD = 11.5V, LVR = 12.6V or 11V, LVR = 12.1V (x2 for 24V)

SunSaver (PWM) (6-20A load circuit ratings) Non-programmable

Preset: LVD = 11.5V, LVR = 12.6V  (x2 for 24V)

SunLight (PWM) (10-20A load circuit ratings) Non-programmable

Preset: LVD = 11.7V, LVR = 12.8V (x2 for 24V)

EcoBoost MPPT (20-30A load circuit ratings) Programmable with display model only

Preset: LVD = 11.5V, LVR = 12.6V  (x2 for 24V)

EcoPulse (PWM) (10-30A load circuit ratings) Programmable with display model only

Preset: LVD = 11.5V, LVR = 12.6V  (x2 for 24V)

SHS (PWM) (6-10A load circuit ratings) Non-programmable

Preset: LVD = 11.5V, LVR = 12.6V  (x2 for 24V)

 

Other Load Control Equipment 

TriStar PWM in load control mode (45-60A load circuit ratings)

7 Presets: LVD = 11.1-12.3V, LVR = 12.3-13.8V (x2 for 24V, x4 for 48V)

Relay Driver (1-4 separate loads; 750mA circuit rating; or 3rd party relay) Programmable

Presets: LVD = 11.5V, LVR = 12.6V or 11.1V, LVR = 12.2V (12V only) 

ReadyRelay (1-2 separate loads; 6A <30V, 500mA <60V; or external relay) 

Integrated Series accessory compatible with GenStar MPPT 

Programmable with LiveView 2.0 or GenStar built-in display

Presets: LVD = 11.1-12.85V, LVR = 12.6-13.3V (x2 for 24V, x4 for 48V)

SureSine inverters with built-in AC output load control

New SureSine 150-2500 Watts continuous, Programmable with Mobile App

Presets: LVD = LVD = 11.8V, LVR = 12.8V; 11.5V, LVR = 12.6V or 10.5V, LVR = 11.6V

(x2 for 24V, x4 for 48V)

SureSine Classic 300W continuous; 600W 15 minute Surge

Programmable with 3rd party MODBUS software only

Presets: LVD = 11.5V, LVR = 12.6V or LVD = 10.5V, LVR = 11.6V

 

Load Control Settings 

Programable settings can be modified in numerous ways as indicated above. Adjustments to the GenStar MPPT and ProStar family of products can also be made with the built-in displays. The LVD settings for the SureSine inverter cannot be programmed with MSView but can be adjusted with 3rd party MODBUS software as indicated in this document. https://www.morningstarcorp.com/wp-content/uploads/technical-doc-suresine-lvd-adjustment-en.pdf

The built-in load control settings include a delay before LVD (or LVD Warning time). This is the time delay between when the battery voltage drops below the LVD voltage threshold and when the loads are disconnected. This provides two benefits. For systems with larger loads that may turn on briefly this will keep the loads from being disconnected when there is a momentary drop below the LVD voltage. It will also signal an LVD warning to alert the user that LVD may occur shortly.

The threshold function of the Relay Driver is often used for load control. It uses a low voltage threshold for LVD and a high voltage threshold for LVR. Our Relay Driver Overview and Applications tech doc provides an overview of features and how to use the Relay Driver. https://www.morningstarcorp.com/technical-documents/relay-driver-overview-and-applications/

In addition to LVD settings, the GenStar MPPT also includes Low State of Charge disconnect/ reconnect (LSOCD/ LSOCR) settings. The LSOCD/ LSOCR settings can only be activated if SOC data is available from a ReadyShunt or a ReadyBMS Integrated Series accessory.

The ReadyRelay can be configured for Load control with the same type of LVD and LSOCD settings as the built-in load control settings of the GenStar controller.