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  • Q How to Use an Inverter for Emergency Home Backup Power

    A A very simple way to use an inverter for emergency power (such as during a power outage), is to use a car battery (with the vehicle running), and an extension cord running into the house, where you can then plug in electrical appliances.
    And also you can build up a basic solar power system with PV, charging controller, the battery and the power inverter. Better to use the pure sine power inverter for solar system.

  • Q What size inverter should I buy?

    A The size you choose depends on the watts (or amps) of what you want to run (find the power consumption by referring to the specification plate on the appliance or tool). We recommend you buy a larger model than you think you'll need (at least 10% to 20% more than your largest load).
    Example: You want to power a computer with a 17" monitor, some lights, and a radio.
    Computer: 300 Watts
    2 - 60 Watt lights: 120 Watts
    Radio: 10 Watts
    Total Needed: 430 Watts
     

    For this application, you would minimally need a 500W inverter, and should give some thought to a larger one, as there will likely be a time when you wish you'd bought a bigger model ... in this example, you might decide you'd like to run a fan while you compute, or let the kids watch TV.

  • Q What is the efficiency of a power inverter?

    A When it works the power inverter will consume a part of the input power. The output power will be lower than the input power. The efficiency of the power inverter is the ratio of output power and input power. If the input power is 100 watts (from DC power), and the output power is 80 watts (for AC power). Then the efficiency of the power inverter is 80%. When we use a power inverter, it is better not to power the device for more than 80% of the rated power, and not to be continuously used for a long time.

  • Q How to Use an Inverter for Emergency Home Backup Power

    A A very simple way to use an inverter for emergency power (such as during a power outage), is to use a car battery (with the vehicle running), and an extension cord running into the house, where you can then plug in electrical appliances.
    And also you can build up a basic solar power system with PV, charging controller, the battery and the power inverter. Better to use the pure sine power inverter for solar system.

  • Q What size inverter should I buy?

    A The size you choose depends on the watts (or amps) of what you want to run (find the power consumption by referring to the specification plate on the appliance or tool). We recommend you buy a larger model than you think you'll need (at least 10% to 20% more than your largest load).
    Example: You want to power a computer with a 17" monitor, some lights, and a radio.
    Computer: 300 Watts
    2 - 60 Watt lights: 120 Watts
    Radio: 10 Watts
    Total Needed: 430 Watts
     

    For this application, you would minimally need a 500 W inverter, and should give some thought to a larger one, as there will likely be a time when you wish you'd bought a bigger model ... in this example, you might decide you'd like to run a fan while you compute, or let the kids watch TV.

  • Q Do I need Modified Sine Wave, or Pure Sine Wave?

    A You should know about the a dvantages of Pure Sine Wave inverters over modified sine wave inverters:
     
    a) Output voltage wave form is pure sine wave with very low harmonic distortion and clean power like utility-supplied electricity.
     
    b) Inductive loads like microwave ovens and motors run faster, quieter and cooler.
     
    c) Reduces audible and electrical noise in fans, fluorescent lights, audio amplifiers, TV, Game consoles, Fax, and answering machines.
     
    d) Prevents crashes in computers, weird print out, and glitches and noise in monitors.
     
    e) Reliably powers the following devices that will normally not work with modified sine wave inverters :
    · Laser printers, photocopiers, magneto-optical hard drives
    · Certain laptop computers (you should check with your manufacturer)
    · Some fluorescent lights with electronic ballasts
    · Power tools employing "solid state" power or variable speed control
    · Some battery chargers for cordless tools
    · Some new furnaces and pellet stoves with microprocessor control
    · Digital clocks with radios
    · Sewing machines with speed/microprocessor control
    · X-10 home automation system
    · Medical equipment such as oxygen concentrators

  • Q What is the difference between sine wave and modified sine wave?

    A Modified Sine Wave works well for most uses, and is the most common type of inverter on the market, as well as the most economical. Pure Sine Wave inverters (also called True Sine Wave) are more suited for sensitive electrical or electronic items such as laptop computers, stereos, laser printers, certain specialized applications such as medical equipment, a pellet stove with an internal computer, digital clocks, bread makers with multi-stage timers, and variable speed or rechargeable tools (see " Appliance Cautions" below).

    If you wish to use those items with an inverter, then choose a Pure Sine Wave inverter. If you mostly want to run lights, TV, microwave oven, tools, etc, a Modified Sine Wave inverter is fine for your needs.

  • Q Why choose SINEMAX off-grid inverters?

    A Military-grade durability, IEC/UL certification, 10-year warranty, and custom OEM solutions for unique power needs.
    Read more our website: http://www.sinemaxinverter.com
TESTIMONIALS
WHAT OUR CLIENTS SAY
  • “Their off grid pure sine power inverter compiance with (UL458)on first try. The dual China-Thailand production let us scale from 500 to 5,000 units/month without quality dips. More than a vendor – a power partner.”
    Jack Wilson-CEO Energy Solutions 26 March, 2025
  • “Ordered 8,000 custom 3000W inverters with our branding and 50°C thermal specs. Sinemax’s Thailand factory delivered zero defects while cutting lead times by 40%. Finally, an Asian supplier that understands ‘rush’ means yesterday!”

    Brian Murdoch– Supply Chain Director  11 December, 2024
  • ”Initially, concerns existed about Chinese factories' communication efficiency, but Sinemax's team addressed them with English - fluent engineers and daily production photos. When the first batch of 2,000 12V 3000W inverters arrived, three had scratched casings. They swiftly air - freighted replacements within 72 hours - faster than our local suppliers.“ Richard Smith-Outback Mining Tech 09May, 2025
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