300W Pure Sine Wave Inverter

The SureSine 300 Watt Pure Sine Wave Inverter from Morningstar Corp. is the perfect solution for those seeking reliable, high-quality power for a variety of applications. This inverter provides 300 watts of continuous power, making it ideal for powering a wide range of devices and appliances in off-grid situations.

The SureSine inverter is designed to convert DC power from your solar panels or battery storage into AC power, which is used by most household appliances. What sets this inverter apart is its pure sine wave output, which is the same type of power supplied by the grid. This ensures your devices run smoothly and efficiently, without the risk of damage caused by inferior quality power.

Not only does the SureSine inverter provide reliable power, but it also comes packed with features for ease of use and longevity. It has a robust design to withstand extreme environments and mission-critical applications, making it a trusted choice in over 100 countries.

Whether you’re powering lighting in agricultural settings, providing power for residential use, or ensuring continuous operation of telecom systems, the SureSine 300 Watt Pure Sine Wave Inverter is a reliable choice. It’s also perfect for use in rural electrification projects, RVs, caravans, marine applications, and security and surveillance systems.

With the SureSine 300 Watt Pure Sine Wave Inverter, you can have peace of mind knowing you have a reliable power source wherever you need it. So why wait? Invest in reliable power today.

The new 300 Watt SureSines greatly expand our inverter offering that started with the acclaimed SureSine Classic.  The new SureSine line has:

  • 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 SureSine line uses 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 means higher reliability– for example, the  300W model doesn’t derate until 45 C and delivers 200W at 60 C.  That’s outstanding performance in its power class.
  • Full communications capabilities include: RS485, USB, Ethernet, MS-CAN, Bluetooth while using industry-standard MODBUS protocol.

AC options include: hard-wire terminals for all markets and power levels, Type B for North America 150, 300, and 700W versions, and Universal for International 150, 300, and 700W versions.

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


Specifications and Certifications by Model

Power Output Models

300 Watts

*power derating at high ambient temperatures 40 C and above.
Rated Battery Voltage 12, 24 or 48V
Min. Battery Operating Voltage 10.5/21.0/42.0V
Max. Operating Battery Voltage 16.5/33.0/66.0V
Continuous Power@25C 300W
Power Surge @40C (<5 sec) 600W
1 minute Surge Power 450W
3 minute Surge Power 360W
Operating Temperature Range -40 C to +60C
Peak Efficiency 91/91/92%
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.