Growatt 20kW On-Grid Solar Inverter (6 MPPT, 99% Efficiency)

Growatt 20kW on-grid inverter is built for commercial and large residential solar systems where roofs are big and complicated. Its standout feature is the input side: six MPPTs and twelve strings let you connect many groups of panels, even if they face different directions, sit at different angles or get shaded at different hours, and each group is tracked separately. Growatt lists a maximum efficiency of 99%, and a wide working voltage range gives a longer daily production window. Troubleshooting is easier too, because the inverter monitors all twelve strings and runs a smart I-V diagnosis that helps pinpoint a faulty string without climbing on the roof to test every panel. An integrated DC switch and IP65 enclosure complete the package. It is a grid-tied model, so it works with the utility grid and does not use batteries.

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Growatt 20kW On-Grid Solar Inverter - Key Features

• 20kW three phase on-grid output
• 6 MPPTs and 12 string inputs
• Maximum efficiency of 99%
• 12 string monitoring with smart I-V diagnosis
• Integrated DC switch
• IP65 protection rating
• LED and app interface for easy local maintenance
• Remote service available on the Growatt portal
• Wide working voltage range for a longer production window

Growatt 20kW On-Grid Solar Inverter - Technical Specifications

• Brand: Growatt
• Type: three phase on-grid solar inverter
• Rated power: 20kW
• MPPTs: 6
• String inputs: 12
• Maximum efficiency: 99%
• Monitoring: 12 string monitoring, smart I-V diagnosis
• DC switch: integrated
• Interface: LED + app
• Protection: IP65

Who Should Buy This Inverter?

• Factories, warehouses and commercial buildings with large roofs
• Rooftops with several slopes or orientations
• Sites where shading changes during the day
• Net metering customers who want to export extra power
• Installers who want to cut troubleshooting time with string level monitoring
• Owners of a three phase connection who do not need battery backup

Why Multiple MPPTs Matter

Each MPPT tracks the best working point for the strings connected to it. On a roof with panels facing east, west and south, a single MPPT would force them all to work at the same compromise point, wasting energy. Six MPPTs let each group work at its own ideal point, which improves daily yield on complex roofs. They also keep a shaded string from pulling down the rest of your array. If your roof is a single large flat surface, you will use fewer inputs, but the extra capacity gives you room to expand later.

Growatt 20kW On-Grid Solar Inverter - Compatibility and Installation Guide

• Confirm that your site has a three phase supply
• Plan your strings so each MPPT carries panels of the same type and orientation
• Check the maximum DC voltage and current limits in the datasheet before wiring
• Use correctly sized cables and check polarity on every DC connection
• Set up monitoring through the Growatt portal after installation
• Installation should be done by a qualified solar installer

Frequently Asked Questions

What is the rated power?
20kW.

How many MPPTs does it have?
Six, with 12 string inputs.

How efficient is it?
Up to 99% maximum.

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

What is the IP rating?
IP65.

Can I monitor it remotely?
Yes, through the Growatt portal and app.

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