Project News// Sunways supplied 3.2MWp inverters in the project in ZheJiang, China

On 21th July 2020, a 3.2MWp distributed PV project that constructed by Ningbo Sunways Technologies Co., Ltd. was successfully fed into the grid in YunZhongMa company, Zhejiang Province. This is the first megawatt-level PV grid-connected project that Sunways has participated in China. Sunways, as one of the oldest and largest PV inverter manufacturer in the world, originated in Germany in 1993, its previous projects mainly focused on Europe, such as Germany, Spain, France, Italy, Switzerland, and other countries and regions. The YunZhongMa Project is the first megawatt-level project that Sunways participated in China. The success of the completion of this project also marks that Sunways, a veteran inverter company from German, has officially entered the Chinese market.

Part 1 Project Overview

This project used 48 pieces of Sunways three-phase six-MPPT industrial inverter (STT60KTL), and this inverter has the features of high efficiency, high AC overloading ability, and lower O&M costs, etc. This inverter adopts a design with 6 MPPTs and 12 PV inputs (each two PV inputs paralleled in one MPPT. The 1100V DC input voltage makes it supports 150% DC oversizing in a long-period and achieves 1.1 times continuous and stable overloading on the AC side, and this ensures the PV system can obtain more power generation and lower the cost of electricity (LCOE).

In terms of safety, STT60KTL adopts a fuse-free design. Compared with the traditional three or more strings paralleled MPPT circuit, the two-strings paralleled circuit can realize short-circuit protection without fuses, which is safe and convenient for the maintenance in the future. In addition, this inverter can accurately pinpoint the abnormal PV strings by IV scan function, which is of great significance for improving the O&M efficiency and reducing the O&M costs.

     02 Estimated Income of the Project

According to the performance of Sunways inverters installed in Vietnam, with the conditions of 30% more PV panels connected in the DC side and good radiation, the daily power generation can reach up to 7KWh per kilowatt. Combined with the annual radiation in Zhejiang Province, and in the condition of oversizing 30% PV panels in this power station, this 3.2MWp power station can generate about 4 million kWh electricity every year, and this can save more than 3.3 million yuan for the company in electricity bills each year.

03 Environmental Contribution of the Project

Global environmental problems are becoming more and more serious in nowadays, more and more countries have introduced policies to continuously promote clean energy to replace traditional high-pollution, high-energy power generation, such as coal. So PV power generation’s emergence and prevalence is exactly the trends of the times. Sunways has always been actively responding to this call and taking the lead in the continuous development of new PV energy. After grid connection, about 4 million kWh of electricity will be fed into the power grid annually, which equals to 1,600 tons of standard coal saving while offsetting 4000 tons of CO2 and 30 tons of SO2 footprints every year, equivalent to planting more than 90000 trees every year.