Inverters

The transformer-free products have a power range of 3-6 kW and efficiency of 97.8%. The Chinese manufacturer says the devices are designed to accurately match the voltage and phase of the grid sine wave AC waveform.

Researchers from the U.S. National Renewable Energy Laboratory have developed a tool to balance customer curtailment and grid stability. The “Precise” tool for utilities provides unique inverter settings tailored to each customer, with minimal investment and labor for companies that use it.

A 120 MW solar plant located in a fishery near Cixi, in the Chinese province of Zhejiang, was recently completed. The plant, which has secured a tariff of RMB0.95 ($0.12)/kWh, is the second phase of a 320 MW project owned by Chinese developer Hangzhou Fengling.

A U.S. research group is now developing new inverters to protect solar installations from cyberattacks. The researchers also aim to create new cybersecurity standards. Professor Alan Mantooth, the group’s research coordinator, said that inverters can be shut down if they are hacked, or contribute to grid instability and result in the overcharging of batteries, while potentially creating problems that we still don’t know how to address.

In light of the slew of trade shows and industry events canceled over the Covid-19 pandemic, solar companies and industry leaders have moved online, with virtual presentations, information sessions, and product debuts to get you through quarantine.

The move represents a step forward in the implementation of the National Action Plan for Renewable Energy (Paner), through which the West African nation aims to install 1.42 GW of renewable energy by 2030.

The U.S. conglomerate plans to deploy and test new controls with its commercial PV LV5 inverter platform. It aims to develop “grid-forming” controls to allow wind and solar inverters to form voltage and frequency levels like traditional generators. The company wants to improve coordination and synchronization among multiple grid-forming resources, and is working on smart PV reserve controls to improve the transient stability of systems with high renewables penetration.

The so-called Optiverter is an all-in-one residential solution developed by startup Ubik Solutions and researchers from Estonia’s TalTech Power Electronics Research Group. The developers claim that the new solution can provide 30% more power than traditional microinverters under partially shaded conditions.

Another big solar event has joined the list of those canceled because of Covid-19. The next edition of The Smarter E event will take place next year.

The solar plant was built with fixed structures on a 400-hectare water surface at a fishery in Anhui province. The project was the first unsubsidized plant approved by the National Development and Reform Commission (NDRC) in 2019 and is selling power at a price of RMB 0.3844 ($0.054) per kWh.