Solar Inverters
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SI 300 220V UL Angled retouch feature 430x365


The Suresine™ is a 300 watt pure sine wave inverter (12 volt dc input) designed specifically for remote off-grid photovoltaic (PV) systems. It is an ideal solar 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 pricing provides the best small inverter value in the market. It is highly reliable, having no internal cooling fan or other moving parts prone to failure.


Key Features and Benefits

  • Pure Sine Wave
    • Provides quality AC equivalent to grid power. A sine wave will extend the life of household appliances (lights, TV, fans, etc) and improve load performance.
  • Toroidal Transformer Design
    • Generates good waveform throughout the range of input voltages.
  • Outstanding Surge Capabilities
    • Handles a 200% surge during load start-up, to a maximum of 600 Watts.
  • 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.
  • 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 aluminium enclosure to protect against harsh tropical and marine environments.



  • Leisure (Caravan & Boating)
  • Lighting
  • Residential
  • Rural Electrification & Solar Home System
  • Security and Instrumentation
  • Solar
  • Telecommunications
  • Transportation and Traffic






Continuous Power Rating

300 Watts @ 25 degC

Peak Power Rating
(10 minutes)

600 Watts @ 25 degC


DC Input Voltage

10.0 to 15.5 VDC


Pure Sine Wave

AC Output Voltage (RMS)

220 VAC 115 VAC

AC Output Frequency

50 Hz 60 Hz

Peak Efficiency

92 %

Total Harmonic Distortion (THD)

< 4 %


Inverter On (No Load) = 450 mA

Inverter Off = 25 mA

Standby = 55 mA

Electronic Protections

Reverse Polarity (Fused), AC Short Circuit, AC Overload, High Voltage Disconnect, Low Battery Disconnect, High Temperature Disconnect


213 x 152 x 105 mm / 8.4 x 6.0 x 4.1 in


4.5 kg / 10.0 lbs


IP20, Cast Anodized Aluminium

Operating Temperature Range

-40 to +60 degC

Ambient Operating Temperature

-40 to +45 degC

Storage Temperature

-55 to +85 degC


100% (non-condensing)


Conformal Coating on Printed Circuit Boards, Epoxy Encapsulated Transformer and Inductors


CE Compliant CE Compliant, UL Listed (UL 458) for 115V version only, cUL (CSA C22.2 No. 107.1-01) for 115V version only


More Information / References

  Download - SureSine Solar Inverter - Datasheet

  Download - SureSine Solar Inverter - Operation Manual

Request for Quote / +65 68534245

Our Address:
10 Admiralty Street, 
#04-76, North Link Building, 
Singapore 757695
Hours of Operation:
Mon. to Fri.: 8.30am to 6.00pm
Weekends & Public Holidays: Closed

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