GoodWe SDT G3 On-Grid Inverter 25kW (3 MPPT)

The GoodWe GW25K-SDT-30 belongs to the SDT G3 25-40kW series, which is designed for three phase residential and small commercial solar systems that use modern high power panels. At 25kW it suits workshops, shops, schools, farms and larger villas with a three phase connection. It has three MPPTs with two strings each and accepts up to 40A per MPPT, so high current modules do not need to be split into extra strings, and the series supports up to 180% PV oversizing, which lets you install more panels than the inverter’s rating to collect more energy in weaker light. The design is lightweight at about 30kg, quiet in operation and easy to mount. Mixed parallel connection with other SDT G3 inverters is possible, and the Ezlink3000 smart dongle makes parallel setups easier. It carries IP66 protection and a 5 year warranty.

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GoodWe SDT G3 On-Grid Inverter - Key Features

• 25kW three phase on-grid output
• 3 MPPTs with two strings each and 40A input per MPPT
• Supports up to 180% PV oversizing across the series
• 1100V maximum input voltage
• Lightweight design of about 30kg and quiet operation
• Mixed parallel connection with other SDT G3 inverters
• Integrated DC switch and IP66 enclosure
• Optional Type II surge protection and AFCI, depending on the version ordered
• 5 year warranty

GoodWe SDT G3 On-Grid Inverter - Technical Specifications

• Brand: GoodWe
• Model: GW25K-SDT-30 (SDT G3 Series 25-40kW)
• Type: three phase on-grid string inverter
• Rated output: 25kW
• Maximum output current: 37.9A
• MPPTs: 3, with two strings each
• Maximum input current: 40A per MPPT
• Maximum DC voltage: 1100V
• Efficiency: up to 98.6% maximum, 98.2% European (distributor listing)
• Protection: IP66
• Dimensions (H × W × D): 483 × 585 × 230mm
• Weight: about 30kg
• Grid connection: three phase, 50/60Hz
• Warranty: 5 years

Who Should Buy This Inverter?

• Small factories, workshops and shops with a three phase connection
• Schools, clinics and farms with a moderate daytime load
• Large villas with a three phase supply
• Rooftops with high power modules that need high input current
• Owners who may add more SDT G3 inverters later in parallel
• Buyers who prefer a lightweight, quiet inverter that is easy to install

What Does 180% PV Oversizing Do for You?

Oversizing means connecting more panel capacity than the inverter’s rated output. Because panels rarely reach their full rating, a 25kW inverter with, for example, 40kW of panels will spend more of the day near its maximum and produce more over a year. When the panels generate more than the inverter can handle, it simply limits its output. Your installer should check roof space, string design and the 1100V and 40A limits, and decide whether the extra energy is worth the cost of additional panels.

GoodWe SDT G3 On-Grid Inverter - Compatibility and Installation Guide

• Confirm that your site has a three phase supply
• Design strings to stay inside the 1100V and 40A per MPPT limits
• Check whether Type II surge protection and AFCI are included in your version
• Use correctly sized DC and AC cables and check polarity
• Use the Ezlink3000 dongle if you plan to run units in parallel
• Installation should be done by a qualified solar installer

Frequently Asked Questions

What is the rated power?
25kW three phase.

How many MPPTs does it have?
Three, with two strings each.

How much current can each MPPT take?
Up to 40A.

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

What is the IP rating?
IP66.

What is the warranty?
5 years.

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