Product Review: Delta’s 80kW string inverter designed for commercial wall mounting apps

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The M80U is a grid-tied, 3-phase and transformerless inverter that converts direct current (DC) output from a photovoltaic system into a utility frequency alternating current (AC) with industry-leading efficiency of 98.8%. Image: Delta

Delta Americas has unveiled its M80U PV inverter, said to be the first wall mount 80kW string inverter on the market and designed for commercial and utility-scale applications. 

Problem

The use of 3-phase and transformerless string inverters is being driven by the need for higher reliability and conversion efficiencies over conventional central inverters in large commercial and utility-scale PV power plants. 

Solution

The M80U is a grid-tied, 3-phase and transformerless inverter that converts direct current (DC) output from a photovoltaic system into a utility frequency alternating current (AC) with industry-leading efficiency of 98.8%, allowing it to be seamlessly used by the electric grid and within buildings. Designed with simple installation and energy performance in mind, the M80U expands Delta' transformerless solar inverter technology to address the growing needs of commercial facilities and utility operators.  The M80U employs a separable structure that meets NEMA 4X Enclosure Standards to protect personnel and prevent degradation or damage from adverse environmental conditions. To make installation as seamless as possible, the ergonomic grip and eye bolts provide an added level of convenience when installing or removing. In order to maximize space, the inverter can be easily mounted on the foothold of the PV panels without the use of a house or container. 

Applications

Delta’s 80kW string inverter is designed for wall mounting for commercial applications.

Platform

As a 2-stage inverter, the M80U has a wide input operation range spanning from a 200 to 1000 volts direct current (Vdc). The M80U provides superior performance with a peak efficiency of 98.8 percent and a California Energy Commission (CEC) efficiency of 98.5 percent. The device's all-in-one design integrates 16 strings with fuses protection as well as arc fault detection circuits. It includes built-in DC switches and AC and DC surge protection devices (SPDs). To provide increased flexibility during PV array configuration and maximize yield, the M80U is equipped with 2 maximum power point (MPP) trackers. As a result, the inverter is able to ensure optimal performance even in challenging environments, such as those with uneven grounds.   

Availability

May 2016 onwards in the North American market.

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