Inverters

Researchers in Brazil have developed a weighted PV inverter efficiency methodology that accounts for country-specific solar irradiance and operating conditions. The approach is designed to address the limitations of international metrics by incorporating variables such as input voltage and maximum power point tracking (MPPT) performance.

The Nexis solution combines a flexibly configurable hybrid inverter with a modular high-voltage battery offering up to 14 kW charging capacity per stack. The inverter delivers 8–20 kW AC power, supports up to 200% DC oversizing, and features IP65-rated design with integrated backup power.

Sigenergy has launched a 166 kW IP66-rated inverter for C&I solar and storage offering nine MPPT trackers and flexible AC/DC connections. The launch coincided with the opening of its Nantong Smart Energy Center, a 136,000 m² facility for R&D, manufacturing, and global delivery.

The 3 kW N3300S inverter combines a pure sine wave inverter with an integrated MPPT solar charge controller for small residential and hybrid PV systems. The unit supports multiple power sources, flexible battery chemistries, and rapid grid/off-grid switching.

The China Nonferrous Metals Industry Association (CNMIA) says polysilicon production has fallen to 32% of capacity, sustaining oversupply, while wafer prices weaken as post–Chinese New Year demand fails to recover.

German startup Solarsecure Tech has introduced a gateway designed to decouple PV inverters from manufacturer clouds and block unauthorized remote control commands.

Germany’s Fraunhofer Institute for Energy Economics and Energy System Technology IEE (Fraunhofer IEE) says in a new position paper that large-scale battery storage systems in medium-voltage grids should be technically prepared for future grid-forming operation, aiming to bridge the gap between current regulations and potential system stability requirements.

An Australian research team has developed a five-step, rule-based method that detects and classifies underperformance in PV systems using only AC-side inverter data. Validated across more than 1,000 systems, the approach offers a low-cost, low-intervention solution for improving reliability, fault response, and PV system performance.

The US company said its Power Control software is designed to help installers reduce costs and streamline interconnection. Among its features is the ability to control aggregate system exports through software-based limits.

The Chinese manufacturer said its 15 kW three-phase low-voltage hybrid inverter is paired with the stackable BP5000 5 kWh battery supporting up to 120 kWh. It features three MPPTs, 150% oversized PV input, and smart load management for optimized self-consumption.