MAC 50-70KTL3-X2 LV&MV Grid-Tied Inverter

Product Overview

The MAC 50-70KTL3-X2 LV&MV series is a three-phase grid-tied inverter platform available in four models from 50 kW to 70 kW rated output. Low-voltage variants (50K and 60K) operate at 230/400 V with a 340-440 VAC output range, while medium-voltage variants (66K and 70K) operate at 277/480 V with a 425-540 VAC output range.

Each model uses 3 MPPT inputs with up to 64 A per MPPT and 4 strings per MPPT on the first tracker plus 3 strings on MPPTs 2 and 3. The maximum DC input voltage is 1100 V with an MPPT operating range of 200-1000 V. Full-load MPPT voltage is 600-850 V for LV models and 650-850 V for MV models. Maximum efficiency reaches 98.80% with 99.90% MPPT efficiency.

Key Features

• Three-phase grid-tied inverter, 50-70 kW rated output
• 3 MPPT inputs with up to 64 A per MPPT
• 1100 V maximum DC input voltage
• 98.80% maximum efficiency, 99.90% MPPT efficiency
• IP66 protection for outdoor installation
• Smart air cooling
• Transformerless design
• DC reverse-polarity and insulation-resistance protection
• Type II DC and AC surge protection
• RCD (GFCI) and AC short-circuit protection
• String-level monitoring
• Anti-PID and AFCI optional
• OLED + LED display with WiFi / APP
• 4000 m maximum operating altitude (2000 m without derating)
• 5-year standard warranty, 10-year optional

Technical Specifications

DC Input (PV)

Parameter	MAC 50KTL3-X2 LV	MAC 60KTL3-X2 LV	MAC 66KTL3-X2 MV	MAC 70KTL3-X2 MV
Maximum input power	75,000 W	90,000 W	99,000 W	105,000 W
Maximum input voltage	1,100 V	1,100 V	1,100 V	1,100 V
Start-up voltage	250 V	250 V	250 V	250 V
MPPT operating range / rated input voltage	200-1,000 V / 600 V	200-1,000 V / 600 V	200-1,000 V / 700 V	200-1,000 V / 700 V
Full-load MPPT voltage range	600-850 V	600-850 V	650-850 V	650-850 V
Maximum input current per MPPT	64 A / 48 A / 48 A	64 A / 48 A / 48 A	64 A / 48 A / 48 A	64 A / 48 A / 48 A
Number of MPPTs / strings per MPPT	3 / 4+3+3	3 / 4+3+3	3 / 4+3+3	3 / 4+3+3

AC Output

Parameter	MAC 50KTL3-X2 LV	MAC 60KTL3-X2 LV	MAC 66KTL3-X2 MV	MAC 70KTL3-X2 MV
Rated output power	50,000 W	60,000 W	66,000 W	70,000 W
Maximum output apparent power	55,500 VA	66,600 VA	73,300 VA	77,700 VA
Rated output voltage	230 V / 400 V	230 V / 400 V	277 V / 480 V	277 V / 480 V
Output voltage range	340-440 VAC	340-440 VAC	425-540 VAC	425-540 VAC
Rated grid frequency / range	50/60 Hz ±5 Hz	50/60 Hz ±5 Hz	50/60 Hz ±5 Hz	50/60 Hz ±5 Hz
Maximum AC output current	84.4 A	101.3 A	88.2 A	93.6 A
Power factor	1	1	1	1
Power factor adjustment range	0.8 leading – 0.8 lagging	0.8 leading – 0.8 lagging	0.8 leading – 0.8 lagging	0.8 leading – 0.8 lagging
THDi	<3%	<3%	<3%	<3%
AC connection type	3W+N+PE	3W+N+PE	3W+PE	3W+PE

Efficiency

Maximum efficiency	98.80%
China efficiency	98.50%
MPPT efficiency	99.90%

Protection

DC reverse-polarity protection	Available
DC switch	Available
DC surge protection	Type II
Insulation-resistance monitoring	Available
RCD (GFCI)	Available
AC short-circuit protection	Available
AC surge protection	Type II
String monitoring	Available
Anti-PID function	Optional
AFCI (arc-fault circuit interrupter)	Optional

General Data and Certification

Dimensions (W × H × D)	680 × 508 × 281 mm
Weight	58 kg
Operating temperature range	-30 °C to +60 °C
Maximum operating altitude	4,000 m (2,000 m without derating)
Night-time self-consumption	<1 W
Topology	Transformerless
Cooling	Smart air cooling
Protection rating	IP66
Relative humidity	0-100%, non-condensing
DC input connector	H4 / MC4 (optional)
AC output connector	OT compression terminal
Display	OLED + LED / WiFi / APP
Communication	USB / RS485 available; WiFi / GPRS / 4G optional
Warranty	5 years standard / 10 years optional
Certification	CQC, EN 61000-3, EN 61000-6, EN/IEC 62109-1, EN/IEC 62109-2, IEC 60529

Applications

The MAC 50-70KTL3-X2 LV&MV series is designed for commercial and industrial rooftop PV installations requiring high efficiency, flexible low-voltage or medium-voltage grid connection and IP66 outdoor durability.

• Commercial rooftop PV systems
• Industrial ground-mounted PV plants
• Carport and canopy solar installations
• Low-voltage 230/400 V grid networks (LV models)
• Medium-voltage 277/480 V grid networks (MV models)

OEM & Custom Requirements

Project supply and private-label requirements can be confirmed against the standard MAC 50-70KTL3-X2 platform. Share the destination grid code, voltage variant 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