1500V photovoltaic system technology is not a relatively new thing. Starting from the second half of 2015, some companies took the lead in launching 1500V products. In the global photovoltaic market except China, 40% of three-phase inverter shipments in 2017 were 1500V systems. , and by 2018 this proportion has increased to 62%, surpassing the 1000V system in all aspects. But to date, 1,500-volt systems have not been widely used in China. When the photovoltaic system is upgraded from 600V to 1000V, the power generation capacity is increased and the cost is reduced. When the photovoltaic system is upgraded from 1000V to 1500V, the efficiency of the photovoltaic system is also greatly improved.

According to BNEF data, at the end of 2019, cumulative photovoltaics were the fourth largest source of power generation in the world, with installed capacity exceeding wind power installed capacity, second only to coal, natural gas, and hydropower. From 2013 to 2019, the compound growth rate of new photovoltaic installed capacity worldwide reached 20%. However, with the changes in domestic photovoltaic policies, the industry has reduced the cost of electricity through bidding, and it has become an inevitable trend to move towards grid parity. Therefore, technological innovation has become an inevitable way to reduce the cost of electricity, reduce dependence on subsidies, and achieve grid parity in photovoltaics. This demand It will continue to drive the application of 1500V systems.

For photovoltaic inverters, high-power string products of 100~200kW and around 1500V are the preferred choice under cost considerations and high efficiency requirements. However, this indirectly poses a new test for the R&D and production of photovoltaic inverter manufacturers. The 1000V photovoltaic simulation power supply no longer meets the testing requirements. What is needed is a 1500V or even up to 2000V photovoltaic simulation power supply for various verification simulations. At the same time, the high-power string inverter structure represents higher power and more groups. MPPT loop, each MPPT needs to be independently simulated; and the protection function test of the DC input end of the entire device may require an input power of at least 1.5 times the rated power.