Kema Electric Co.,ltd.

Product Name：

Three Phase On Grid Inverter ST40-60K

Key Features

◆ On Grid string inverter 40-60KW

◆ Wide PV input voltage range allows more flexible module selections

◆ Transformerless design with higher operation efficiency

◆ Easy and affordable to install

◆ Lightweight and compact size

◆ Firm IP65 inverter enclosure allows outdoor application

◆ LCD and LED display

◆ Integrated RS485/RS232 serial communications

◆ Full data display and communications

◆ PC software for remote monitoring and system troubleshooting

Technical Specifications

Item	Model (ST)	40KTL	50KTL	60KTL
Input (DC side)	Max. DC Input Power	50000W	56000W	66000W
	Max. DC Voltage	1100Vdc
	Start Voltage	250Vdc
	MPPT Operating Range	250~850Vdc
	Number of Inputs	8	10	12
	Number of MPPT	4
	Max. Input Current	4*19A	19/28/19/28A	4*28A
Output (AC side)	Nominal Output Power	40000W	50000W	60000W
	Max. AC apparent Power	46000VA	55000VA	62500VA
	Rated Output Current	60A	75.7A	90A
	Max. Output Current	64A	80A	97A
	Nominal Output Voltage	400Vac
	AC Output Voltage Range	360~440Vac
	AC Grid Frequency Range	50/60 ±5Hz
	Power Factor	Default 1 lagging,adjustable 0.8(leading~lagging)
	THDI	<3%
Efficiency	Max Efficiency	98.10%	98.50%	98.80%
	Euro Efficiency	98.00%	98.10%	98.20%
	MPPT Efficiency	99.60%	99.60%	99.60%
General Data	Operating Temperature	-25°C~+60°C
	Noise (typical)	≤45dB (A)
	Consumption at night	〈1W
	Electrical Isolation	Transformerless
	Cooling Concept	Forced air cooling
	Degree of Protection	IP65
	Communication:RS232/	yes/opt
	RS485/WIFI/GPRS	opt/opt
	Dimension (WDH mm)	545270782
	Weight (kg)	58	60	62
Remark		AC grid voltage range and frequency range depend on local standards.

Overview

Multiple daisy-chain connection

Control panel

The PV System Diagram