1250W Pure Sine Wave Inverter

Experience the reliability and high efficiency of the SureSine 1,250 Watt Pure Sine Wave Inverter. This powerful device converts DC power into AC power, providing a consistent energy supply for your off-grid applications. With a wattage capacity of 1,250, it is capable of powering a wide range of appliances and devices, making it an ideal choice for telecom, security/surveillance, mining, oil & gas, rural electrification, or residential off-grid applications.

Designed by Morningstar Corp., the leading supplier of solar controllers and inverters, the SureSine off-grid inverter boasts excellent performance and durability. It operates with low harmonic distortion and high surge capability, ensuring the safe operation of sensitive electronic equipment. Its pure sine wave output produces a clean and stable power supply, reducing the risk of equipment failure and enhancing the lifespan of your electronic devices and appliances.

The SureSine 1,250 Watt Pure Sine Wave Inverter is also designed for easy installation and use. It features multiple protection functions, including over-temperature, short circuit, and overload protection, providing a safer and more reliable power solution. With its careful design and robust construction, it is built to withstand harsh environments and extreme conditions.

Experience the difference a high-quality inverter can make. Choose the SureSine 1,250 Watt Pure Sine Wave Inverter for a dependable and efficient power solution.

The new SureSine line greatly expands our inverter offering that started with the acclaimed SureSine Classic.  This new SureSines have:

  • Wireless Android and iOS utility apps for set-up and monitoring with remote devices, plus Bluetooth communications
  • Multiple AC hardwire remote terminal options on selected models
  • Industry leading safety, low-noise and high performance NRTL certifications for reliability and system conformance

The 1,250 Watt SureSines use industrial-grade build quality throughout, with models built around premium toroidal transformers for improved sinewave stability. Designed for the most demanding off-grid mission-critical installations, they feature:

  • Superior thermal performance with fanless design and higher reliability
  • Full communications capabilities include: RS485, USB, Ethernet, MS-CAN, Bluetooth while using industry-standard MODBUS protocol.

AC power outputs include hard-wire terminals for all markets and power levels.

Wireless Android and iOS mobile apps included for set-up and monitoring with remote devices.


Specifications and Certifications by Model

Power Output Models


*power derating at high ambient temperatures 40 C and above.
Rated Battery Voltage 24 or 48V
Min. Battery Operating Voltage 21.0/42.0V
Max. Operating Battery Voltage 33.0/66.0V
Continuous Power@25C 1,250W
Power Surge @40C (<5 sec) 2,500W
1 minute Surge Power 1,875W
3 minute Surge Power 1,500W
Operating Temperature Range -40 C to +60C
Peak Efficiency 93/94%
Output Voltage Model Options 120/230V +/-5%
Output Frequency Options 50/60 Hz
Waveform Pure Sine Wave
Total Harmonic Distortion (THD) <2%
Self-Consumption (AC Output Off) <2.3W
Fanless natural convection cooling Yes
Operational Humidity Level 100%
RS485, MS-CAN Yes
USB, Ethernet No
Bluetooth, Android & iOS Apps Yes
IEC-62109-1, IEC 62109-2, IEC 62368-1 Yes
IEC/EN 61000, IEC/EN 55032, IEC/EN 55011 Yes
UL 1741 Yes
UL 458 (pending) Yes
CE/UKCA compliant Yes
Data Storage (4MB/5 years internal) Yes
IP Rating IP20
Manufactured in a Certified ISO 9001 Facility Yes
Warranty 5 Years
Key Features and Benefits

Inverter Functions: DC/AC conversion with pure sinewave

  • Superior industrial-grade product design and manufacturing
  • Engineered for system-level integration and communication with Morningstar charge controllers
  • Communication ports: RS485 USB, Ethernet, MS-CAN, Bluetooth while using industry-standard MODBUS protocol
  • Wireless Android and iOS utility apps included for set-up and monitoring with remote devices
  • AC hardwire terminal option available on selected models (all power ranges and frequencies)
  • Remote On/Off improves safety and enables control in inaccessible locations
  • Auxiliary Power Output (700-2500 W models) provides power for an EIA-485 bus or other small DC loads
  • Overbuilt, industrial-grade low-frequency transformer for improved sinewave stability
  • Fanless convection cooling with extruded aluminum heat sinking, for maximum efficiency and reliability
  • Status LEDs for both System and AC Sinewave output, to ensure reliable operation and notify of any system alerts
  • Industry leading safety, low-noise and high performance NRTL certifications for reliability and system conformance
  • Configuration can be achieved via manual DIP switch configuration or digitally programmable custom setpoints

Introducing Morningstar's New SureSine Off-Grid Inverter Line |

Ten minute video showcasing six new off-grid inverter models from 150-2,500W with 120 or 230V output and 12, 24 or 48V DC input options to cover a wide range of applications.

SureSine Mobile Utility Bluetooth App Video |

Brief video to show users how to use the Android SureSine Bluetooth app to view real time and historical data, send control commands, adjust settings, and update firmware.