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MorningStar SI-300-115V 300 Watt 12 Volts Pure Sine Wave Inverter

MorningStar SI-300-115V
  • MorningStar SI-300-115V Inverter BP2680215
  • The MorningStar SureSine™ is a 300 watt pure sine wave inverter (12 volt DC input) designed specifically for remote off-grid solar systems. It is an ideal inverter for rural electrification projects, telecom, remote cabins and weekend homes, and RV or caravans and boats. The SureSine’s combination of performance, features and competitive price provides the best small inverter value on the market.
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MorningStar SI-300-115V True Sine Wave AC Inverter Off-Grid Cabin, RV, Marine

Model Part Number Watts Input Voltage Output Voltage Type No Load Watts
MorningStar SI-300-115V  BP2680215  300 12 VDC 115 VAC True Sinewave / Off-Grid  55mA 


The MorningStar SI-300-115V SureSine inverter was developed using Morningstar’s power electronics expertise and 25 years of experience with remote off-grid solar systems. This 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 MorningStar SI-300-115V inverter is also a good choice for small PV systems for telecom, remote cabins and weekend homes, and 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.


What's In The Box

  • 1 - MorningStar SI-300-115V True Sine Wave Inverter BP2680215


Model   SI-300-115V SI-300-220V
Description   SureSine-300 Watt (115 Volt, 60 Hz) SureSine-300 watt (220 Volt, 50 Hz)
System Voltage   12 Vdc 12 Vdc
Output Voltage   115 Vac 220 Vac
Frequency   60 Hz 50 Hz
Power Rating   300 Watts 300 Watts

Morningstar Inverter Documents & Manuals

morningstar MorningStar SI-300-115V Installation Manual

MorningStar SI-300-115V True Sine Wave Inverter Cabin / Marine / RV / Telecommunication 12 volts 300 Watts

MorningStar SI-300-115V pure sine wave inverter 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 means this inverter generates good wave form throughout the range of input voltages. Outstanding surge capability the MorningStar SI-300-115V handles a 200% surge during load start-up, to a maximum of 600 watts. With more power available and high efficiency, this inverter has a high peak efficiency will reduce heating and make more solar energy available for powering loads. Another great feature of the MorningStar SI-300-115V inverter is 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. Extremely high reliability and extensive electronic protections. The MorningStar SI-300-115V 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. MorningStar SI-300-115V has no internal cooling fan which is 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. 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. A really cool remote On/Off improves safety by making it easy to install the MorningStar SI-300-115V SureSine in an inaccessible location or enclosure. Reduces system cost by avoiding the need to add an AC safety disconnect to the system.

morningstarIMPORTANT SAFETY INSTRUCTIONS: MorningStar SI-300-115V. (OK, here is the scary legal disclaimer.) It is the responsibility of the purchaser to ensure that all products are installed and operated in accordance with local and national building codes as specific by the NEC (National Electric Code), UBC (Uniform Building Code) or IBC (International Building Code) and local utility company policy. This product is designed for indoor or protected compartment installations. DO NOT expose the inverter to rain, snow, moisture or liquids of any type. Use insulated tools to reduce the chance of electrical shock or accidental short circuits. Remove all jewelry such as rings, watches, bracelets, etc when installing the MorningStar SI-300-115V inverter or any other electronic gear. Always disconnect the batteries or energy source prior to installation or performing maintenance on the MorningStar SI-300-115V inverter. Live power may be present at more than one point since an inverter utilizes both batteries and AC electricity. Turning off the MorningStar SI-300-115V inverter may not reduce that risk. Always verify proper wiring prior to starting the inverter. Do not operate the MorningStar SI-300-115V inverter if it has been damaged. Always read and follow the manufactures installation and operating instructions for the MorningStar SI-300-115V inverter prior to installation and operation.