Customer Question: What really is it that costs so much more to produce a PSW over a MSW inverter?

Customer Question: What really is it that costs so much more to produce a PSW over a MSW inverter?

Wagan Tech7/10/23

by Justin Gray

Customer Question: "Considering the majority of inverters are manufactured overseas, what really is it that costs so much more to produce a PSW over a MSW, besides a few extra computer control boards manufactured by a robotic device with minimal hands on assembly? I've seen plenty of inverter components and video breakdowns including the Wagan brand and they all seem to have more in common than different." -James (via YouTube)

James, the simple answer is that it all comes down to components and features. The cost difference between producing a PSW (Pure Sine Wave) inverter and an MSW (Modified Sine Wave) inverter can be attributed to several factors:

Complexity of Circuitry: Pure Sine Wave inverters require more complex circuitry to produce a smooth and clean sinusoidal output waveform. This complexity increases the number of components and the overall manufacturing cost.

Quality of Output: Pure Sine Wave inverters provide a high-quality electrical output that closely mimics the power provided by the grid. On the other hand, Modified Sine Wave inverters produce a less refined output that may cause issues with certain sensitive electronics or appliances. Achieving a high-quality output requires better components, which adds to the cost.

Efficiency and Performance: Pure Sine Wave inverters are generally more efficient than Modified Sine Wave inverters, meaning they waste less power during the conversion process. Higher efficiency often comes with a higher manufacturing cost due to better components and engineering.

Compatibility: Pure Sine Wave inverters are compatible with a wider range of electronic devices and appliances, including sensitive and high-end equipment like medical devices, laptops, and modern electronics. Modified Sine Wave inverters may cause issues or damage some of these devices, making Pure Sine Wave inverters more versatile but also more expensive to produce.

Research and Development: Developing and refining the technology to produce a clean Pure Sine Wave output requires more research and development efforts, which can be reflected in the higher manufacturing cost.

Demand and Market: The demand for Pure Sine Wave inverters has increased over the years as more electronic devices and appliances require higher-quality power. Higher demand often leads to economies of scale, but in the case of specialized technology like PSW inverters, it might not offset the increased production costs significantly.

Manufacturing Volume: In general, the more units of a product that are manufactured, the lower the per-unit cost. As PSW inverters are typically produced in smaller quantities compared to MSW inverters due to their higher cost, this can contribute to the price disparity.

Despite the higher cost, Pure Sine Wave inverters are preferred for many applications where a clean and stable power output is crucial to ensure the proper functioning and longevity of sensitive electronics and appliances. For less sensitive applications, Modified Sine Wave inverters can still provide a more affordable solution.

The choice between the two depends on the specific requirements and the devices you intend to power.


Pure Sine Inverters (PSW)

Modified Sine Inverters (MSW)

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