Different Inverters Performance in a Simple Solar Power Plant

Abstract

This study analyzes the performance of Pure Sine Wave (PSW) and Modified Sine Wave (MSW) inverters in small- to medium-scale off-grid solar power generation systems. Tests were conducted using a 160 Wp monocrystalline solar panel, 10 A SCC, a 12.8 V–100 Ah LiFePO₄ battery, and both 500 W PSW and MSW inverters, respectively, with varying panel tilt angles of 45°–165°. The results showed that the PSW inverter produced a more stable output voltage in the range of 221–222 V with a fluctuation of ±1 V and low harmonic distortion (2.5%), while the MSW inverter exhibited a 222–225.5 V output voltage with greater fluctuation and higher harmonic distortion under both light and heavy loads. The analysis of the solar photovoltaic (PV) system reveals important insights regarding two types of inverters. The PSW inverter achieves an efficiency ranging from 85% to 95%, offering a stable and smooth output. In contrast, the MSW inverter typically operates at a lower efficiency of 75% to 85%, which varies depending on the load conditions. When it comes to long-term reliability, the PSW inverter significantly outperforms its counterpart, making it a more suitable choice for permanent solar PV installations. From both technical and reliability standpoints, PSW is clearly the superior option and is highly recommended for anyone looking to invest in a lasting solar energy solution. Based on these results, the PSW inverter is more suitable for sensitive loads requiring high power quality, while the MSW inverter can still be used for simpler applications, provided cost considerations are considered.

Keywords

Pure Sine Wave Inverter; Modified Sine Wave Inverter; Solar Power Plant.

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http://dx.doi.org/10.28989/avitec.v8i1.3810

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