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Samlex 12v 300 Watt Pure Sine Wave Power Inverter PST-300-12

Samlex 12v 300 Watt Pure Sine Wave Power Inverter PST-300-12
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Price: $145.53 No Tax
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BatteryStuff Part #: PST-300-12
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See also 600 Watt Model PST-60S-12A for upgrade.

Samlex 12v 300 Watt Pure Sine Wave Power Inverter PST-300-12
Product Description

The PST-300-12 Converts 12VDC to 120 VAC

Samlex offers superior quality Pure Sine Wave AC-DC power inverters for many different applications. offers PURE SINE WAVE (aka true sine wave) that provides high-end specialty users power portability for sensitive electronic equipment. The clean power delivered by a Pure Sine Wave is of the same quality and efficiency as the power provided by your utility company, which is not the case with the cheaper and more popular modified sine inverters.

The 12 volt PST series inverters can withstand dc voltages of up to 16.5 volts which means that they are compatible with highvoltage dc charging-such as solar charging and equalization charging.  Because of the heavy duty chassis, the PST-300-12 is able to cool itself via convection, which allows for less fan run time-leading to longer fan life and less no load draw. 

We highly recommend the use of Pure Sine Wave Inverters to power Computers and related peripheral devices; i.e. printers, optical drives, laser copiers, and if in doubt check with the manufacturer of your equipment.

Other devices that benefit when Pure Sine Wave power is used are variable speed control motors using solid state circuitry, Audio Amplifiers, Digital Clocks and Radios, Medical Equipment, Microwaves, etc.

  • High efficiency
  • Temperature controlled cooling fan – reduces energy consumption
  • Low interference Wide operating DC input range: 10.5 - 16.5 VDC
  • LED indicators for power and protections
  • Low idle power draw
  • Dual GFCI protected AC outlets
  • Commercial grade design suitable for heavy duty loads, long periods of continuous operation & for emergency back up
  • UPC – Universal Protection Circuit: low voltage, over voltage, over temperature, over load and short circuit
  • Detachable cable with 12V plug adapter
  • Detachable cable with battery clamps
  • Safety certified to UL standards, FCC compliant
PLEASE NOTE: Many electrical devices require a good deal more Watts to start or energize than is required run once started. For instance an electric device may require only 250 watts to run but may need 800 watts to start. Please check with the manufacturer of your equipment to obtain minimum watts for starting operation of the equipment or device. *Flat Rate shipping is for the lower 48 states only.

Most Helpful Customer Reviews
   Samlex PST 300 12
By on Mar 31, 2014, Ownership: Just Bought, Knowledge Level: AC/DC is more than a band
(85 of 168 customers found this review helpful)

Pros: Small enough to mount inside a car, powerfully enough to keep laptops, iPhones, and a GPS going with a powerstrip connected to it. Fan is very quiet

Cons: Wish it had a volt meter on it, other than that, none.

Other Thoughts: We used this to keep my daughter happy on an 18 hour drive. Kept the laptop charged so she could play some games and watch DVDs . Was a great babysitter :-)

Did you find this review helpful? Yes|No

   Just what I wanted
By on Mar 19, 2014, Ownership: Just Bought, Knowledge Level: Electricity doesn't scare me.. usually
(89 of 167 customers found this review helpful)

Pros: Use this inverter at a cabin and so far no problems with the devices I have used. It looks like it should last a long time.

Cons: None

Did you find this review helpful? Yes|No

   solex 300 watt pure sine wave inverter
By on Jul 20, 2014, Ownership: Use regularly, Knowledge Level: Genius is my way of life
(85 of 162 customers found this review helpful)

Pros: For 300 Watts of pure sine wave electricity to run my sensitive electronics this was a great purchase. Comparatively for what i was looking for it was the obvious choice.

Cons: The only bad thing is the very loud siren that sounds when power from my undersized (soon to be oversized) battery bank drops below 12volts. It serves its purpose well. i am just a whiney consumer in this aspect.

Did you find this review helpful? Yes|No

   PST-300 In a tent
By on Jun 30, 2016, Ownership: Use regularly, Knowledge Level: I know what an outlet is
(1 of 2 customers found this review helpful)

Pros: Excellent sturdy construction. Fairly easy to use even by electrical dummies like me. Very impressive customer support from Samlex! Needed to know how to use this device in a small camping trailer and tent camping using solar maintained deep cycle battery. Called Samlex and questions were immediately answered by a Samlex engineer who answered them in such a way that even an inverter dummy like me could understand.

Cons: None

Other Thoughts: A simple "product use for dummies" manual might come in handy!

Did you find this review helpful? Yes|No

Review Summary
  4.75 Average Rating
Ratings Small
Rated 4.75/5 Stars from 4 customer reviews.
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Technical Specifications
Length 9.69
Width 5.76
Height 2.58
Weight 3.46
Shipping Weight (lb.) 6
Output Voltage 120VAC ±3%
Maximum Output Current 2.54A
Output Frequency 60Hz ±1%
Type Of Output Waveform Pure Sine Wave
Total Harmonic Distortion of Output Waveform <3%
Continuous Output Power (At Power Factor = 1) 300 Watts
Surge Output Power (At Power Factor = 1; <1 sec) 600 Watts
Peak Efficiency (At Full Load) 88%
AC Output Connections NEMA-20R GFCI Duplex Outlets
Nominal DC Input Voltage 12V
DC Input Voltage Range 10.5 - 16.5 VDC
Maximum Input Current 40A
DC Input Current at No Load < 500 mA
DC Input Connections Tubular Type Screw Down Terminals
Display-Led Power, Abnormal
Low DC Input Voltage Alarm 10.5V
Low DC Input Voltage Shutdown 10V
High DC Input Voltage Shutdown 16.5V
Short Circuit Shutdown Yes
Overload Shutdown Yes
Ground Fault Shutdown Yes
Over Temperature Shutdown Yes
Reverse Polarity on DC Input Side Yes
Cooling Forced Air Temperature Controlled Fan
Safety Intertek - ETL Listed. Conforms to ANSI/UL Standard 458.
EMI / EMC FCC Part 15(B), Class B
Operating Temperature Range 0°C-40°C
Warranty 2-Year
Model: PST-300-12
Manufacturer: Samlex
Manufacturer Part #: PST-300-12

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