MAX 320K-X Grid-Tied Inverter

Product Overview

The MAX 320K-X is a three-phase grid-tied inverter rated at 320 kW output. It uses 6 MPPT inputs with 5 strings per MPPT at 80 A maximum current and 100 A maximum short-circuit current, accepting up to 480 kW PV input at a maximum voltage of 1500 V. The MPPT operating range is 800-1500 V with a rated input voltage of 1080 V.

The output delivers 352 kVA maximum apparent power at 800 V nominal (640-920 V range) on a 3W/PE connection. Maximum efficiency reaches 99.03% with 99.90% MPPT efficiency. Type I/Type II surge protection, string monitoring, anti-islanding and optional Anti-PID and DC arc-fault detection complete the protection set.

Key Features

• Three-phase grid-tied inverter, 320 kW rated output
• 6 MPPT inputs with 80 A per MPPT
• 1500 V maximum DC input voltage
• 99.03% maximum efficiency, 99.90% MPPT efficiency
• IP66 protection for outdoor installation
• Smart air cooling
• Transformerless design
• DC reverse-polarity and insulation-resistance protection
• Type I / Type II DC and AC surge protection
• Ground-fault, residual-current and anti-islanding protection
• String-level monitoring
• Anti-PID and DC arc-fault detection optional
• LED display with APP
• 5000 m maximum operating altitude (>4000 m derating)
• 5-year warranty

Technical Specifications

DC Input (PV)

Maximum input power	480 kW
Maximum input voltage	1,500 V
Start-up voltage	500 V
Rated input voltage	1,080 V
MPPT operating range	800-1,500 V
Number of MPPTs	6
Strings per MPPT	5 / 5 / 5 / 5 / 5 / 5
Maximum input current per MPPT	80 A
Maximum short-circuit current per MPPT	100 A

AC Output

Rated output power	320 kW
Maximum output apparent power	352 kVA
Maximum output current	254 A
Rated output voltage	800 V, 3W/PE
Output voltage range	640-920 V
Rated grid frequency / range	50 Hz / 45-55 Hz, 60 Hz / 55-65 Hz
Power factor	>0.99
Power factor adjustment range	0.8 leading – 0.8 lagging
THDi	<3%

Efficiency

Maximum efficiency	99.03%
China efficiency	98.54%
MPPT efficiency	99.90%

Protection

DC reverse-polarity protection	Available
DC input switch	Available
AC short-circuit protection	Available
AC overcurrent protection	Available
DC / AC surge protection	Type I / Type II
Insulation-resistance monitoring	Available
Ground-fault monitoring	Available
Residual-current monitoring	Available
Anti-islanding protection	Available
String monitoring	Available
Anti-PID function	Optional
DC arc-fault detection	Optional

General Data and Certification

Dimensions (W × H × D)	1,145 × 790 × 371 mm
Weight	126 kg
Operating temperature range	-30 °C to +60 °C
Relative humidity	0-100%
Maximum operating altitude	5,000 m (>4,000 m derating)
Night-time self-consumption	<1 W (AC-powered: <25 W)
Protection rating	IP66
Topology	Transformerless
Cooling	Smart air cooling
Display	LED / APP
Communication	USB / RS485 / 4G available; PLC optional
DC connector	H4 / MC4 (optional)
AC connector	OT / DT terminal (max 400 mm²)
Warranty	5 years
Certification	NB/T 32004-2018, GB/T 29319-2024, GB/T 19964-2024

Applications

The MAX 320K-X is designed for utility-scale ground-mounted and large commercial rooftop PV installations requiring 1500 V DC architecture and high MPPT count for flexible string configuration.

• Utility-scale ground-mounted PV plants
• Large commercial and industrial rooftop PV
• Floating PV systems
• Agrivoltaic installations

OEM & Custom Requirements

Project supply and private-label requirements can be confirmed against the standard MAX 320K-X platform. Share the destination grid code and installation environment.

• Private-label enclosure and documentation
• Grid-code configuration for the target market
• Manual localisation for the destination country
• Packaging and delivery planning