hero image

Off-Grid Inverter Testing Solution

An inverter is an electrical device capable of altering the voltage, frequency, phase, and other electrical characteristics of a power system. Inverters can be found in a wide range of applications, including electric vehicles, photovoltaic power systems, wind energy systems, and various household appliances like TVs and computers. In the field of photovoltaic power generation, inverters are generally categorized into two types: grid-connected inverters and off-grid inverters. Off-grid inverters refer to electrical systems that operate independently of the public power grid. They typically consist of manageable modular components to form a self-contained small-scale electrical network. These systems store the DC electricity generated by solar panels in batteries, and this DC power is then transmitted to the off-grid inverter for conversion into AC electricity, which can be used to power electrical loads. Off-grid inverters are especially suitable for remote areas where access to the main power grid is difficult, such as deep within mountains, deserts, and wilderness, and they provide an on-demand power source to meet electricity needs at any time and in any location.

Off-grid inverters are primarily used in new energy systems. Before they are introduced to the market and put into use, various parameters must be tested to ensure that their performance meets the requirements. These tests include evaluating conversion efficiency, startup performance, harmonic distortion, maximum output power, and etc. Among these, the conversion efficiency of off-grid inverters is a crucial performance indicator. A higher conversion efficiency means less energy loss, which is particularly important for increasing the effective power generation of photovoltaic systems and reducing the overall cost of electricity generation.

Solution Introduction

For the testing of off-grid inverters in photovoltaic power generation, SUITA offers a new generation of instruments with ultra-high accuracy for power, including bidirectional programmable DC power supplies, regenerative AC power supplies, and power analysis wavecorder, to meet user requirements. In this testing solution, a bidirectional programmable DC power supply is connected to the input side of the off-grid inverter, simulating the input power from solar panels. A regenerative AC power supply is connected to the output side of the inverter, simulating AC electronic loads. A power analysis wavecorder is used to measure various performance indicators of the inverter, such as harmonics, output power, and conversion efficiency. Furthermore, SUITA provides robust supervisory software to assist engineers with data analysis.

Main Advantages
SUITA Electric's strong professional capabilities make its products more advantageous in related fields
SPAW7000 features 7 power channels and 2 motor channels, supporting a variety of voltage and current input ranges modules with distinct levels of precision. A maximum of 7 modules can be installed on a single instrument, each typically offering different specifications. This flexibility empowers users to select modules tailored to their specific requirements, thus customizing the instrument to accommodate a wide array of applications using just one power analyzer. We currently offer 8 modules with different specifications, with ongoing development of new modules.
SUITA Electric is committed to covering complex scenarios in various fields across the entire industry with its products.