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Morningstar SureSine 300 Inverter

Availability: Call For Availability

Quick Overview

The Sure
Sine inverter has been developed using Morningstar’s power
electronics expertise and 25 years of experience with remote off-grid
photovoltaic (PV) systems.

product is a pure sine wave inverter designed specifically
to meet the needs of rural PV electrification requiring AC power
including solar home systems, schools, community centers and health
clinics. This inverter is also a good choice for small PV systems,
telecom, remote cabins and weekend homes, RV/caravans and boats.

The SureSine’s
combination of performance, features and competitive price provides
the best small inverter value on the market. It is highly reliable,
having no internal cooling fan or other moving parts prone to failure.


  • More Information – The two LEDs provide important information to the user about system status and any fault conditions. An optional digital meter may be connected to the SureSine to display additional system information.
  • Remote On/Off – Improves safety by making it easy to install the SureSine in an inaccessible location or enclosure. Reduces system cost by avoiding the need to add an AC safety disconnect to the system.
  • Adjustability – Four DIP switches provide easy adjustability of several system parameters. Additional adjustability is possible via RJ-11 to RS-232 adapter to a personal computer and using Morningstar’s PC software.

Morningstar SureSine 300 Inverter

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Model Number SureSine 300
Power Rating 300 W
Weight 4.5 kg 10 lbs
Waveform Pure Sinewave
Comments The best for computers, stereo amplifiers, radio and television

Manufacturer Specification Sheets

View FileSure Shine Specification    Size: (204.56 KB)


Improved Load Operation

Pure Sine Wave – Provides quality AC equivalent to grid power. A sine wave will extend the life of the household appliances (lights, TV, fans) and improve load performance.
Toroidal transformer design – Generates good wave form throughout the range of input voltages.
Outstanding Surge Capability – Handles a 200% surge during load start-up, to a maximum of 300 watts.

More Power Available

High Efficiency – A high peak efficiency will reduce heating and make more solar energy available for powering loads.
Low Self-Consumption – The SureSine consumes 450mA while powering loads. During no load conditions, solar energy is not wasted because the SureSine automatically powers down to stand-by mode, reducing self-consumption to one tenth of operating consumption.

sure sineExtremely High Reliability

Extensive Electronic Protections – The SureSine has extensive electronic protections that will automatically protect against faults and user mistakes such as short circuit, overload, high temperature and low voltage disconnect. Recovery from most faults is automatic.
No Internal Cooling Fan – A key design objective since fans often fail in harsh environments and are noisy, consume power and blow dirt into the electronics.
Tropicalization – The SureSine uses epoxy encapsulation, conformal coating, stainless steel hardware, and an anodized aluminum enclosure to protect against harsh tropical and marine environments.

sure sign

morningstar inverter


  Morningstar Inverters:
Power Rating
SureSine 300
300 W
4.5 kg
10 lbs
Pure Sinewave
The best for computers,
stereo amplifiers, radio and television
SureSine 600
600 W
4.5 kg
10 lbs
Pure Sinewave
The best for computers,
stereo amplifiers, radio and television