GoodWe GT Series On-Grid Inverter 125kW (10 MPPT IP66)

The GoodWe GW125K-GT is the largest inverter in GoodWe’s GT string range, made for big commercial and industrial rooftops and ground-mounted plants. It delivers 125kW on three phases, with ten MPPTs and up to twenty strings, so it can take large arrays with many orientations and module types. Each MPPT accepts up to 42A, which is 21A per string, making the inverter a good match for today’s high current modules, and the maximum input voltage is 1100V. Like the rest of the series it offers string level monitoring, Type II surge protection on both AC and DC sides, an integrated DC switch and an IP66 enclosure, with optional C5 corrosion protection and optional AFCI. For plants that may add storage later, the GT series can be paired on the AC side with GoodWe’s ESA storage through the SEC3000C controller, which coordinates up to 40 GT inverters.

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GoodWe GT Series On-Grid Inverter - Key Features

• 125kW three phase on-grid output
• 10 MPPTs with up to 20 strings
• 42A input per MPPT, 21A per string, 1100V maximum input
• String level monitoring
• Type II SPD on both AC and DC sides
• IP66 enclosure, optional C5 protection and optional AFCI
• Can be paired with GoodWe ESA storage through the SEC3000C controller
• Remote or on-site firmware upgrade
• 5 year warranty

GoodWe GT Series On-Grid Inverter - Technical Specifications

• Brand: GoodWe
• Model: GW125K-GT (GT Series 100-125kW)
• Type: three phase on-grid string inverter
• Rated output: 125kW
• MPPTs: 10, two strings each
• Maximum DC voltage: 1100V
• Maximum input current: 42A per MPPT
• Series maximum efficiency: up to 99.0%
• Protection: IP66
• Communication: RS485, PLC, optional Wi-Fi
• Warranty: 5 years

Who Should Buy This Inverter?

• Large industrial plants and big factories
• Utility-scale rooftops that want fewer, larger inverters
• Ground-mounted commercial solar projects
• Developers who want to add storage later on the AC side
• Owners who want to reduce the number of inverters to maintain
• Net metering projects that plan to export surplus energy

Fewer, Larger Inverters: Pros and Cons

A 125kW inverter replaces several smaller ones, which means fewer units to buy, mount, wire and maintain, and a smaller number of communication points. The trade-off is that if one inverter stops, a larger share of your plant goes offline until it is repaired, so many owners keep a spare plan and use string level monitoring to catch problems early. Your installer can compare one 125kW unit with a mix of smaller ones, based on your roof layout, budget and how critical continuous generation is for your business.

GoodWe GT Series On-Grid Inverter - Compatibility and Installation Guide

• Confirm that your site has a three phase connection of suitable size
• Design strings to stay inside the 1100V and 42A per MPPT limits
• Plan the mounting structure for a heavy unit and check the weight in the datasheet
• Use correctly sized DC and AC cables, and check polarity
• Check your utility’s requirements for large grid-connected systems
• Installation should be done by a qualified commercial solar installer

Frequently Asked Questions

What is the rated power?
125kW three phase.

How many MPPTs does it have?
Ten, with up to 20 strings.

Does it need a battery?
No, it is an on-grid inverter.

Can storage be added later?
Yes, GoodWe ESA storage can be paired on the AC side through the SEC3000C controller.

What is the IP rating?
IP66, with optional C5 protection.

What is the warranty?
5 years.

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