WIT 4-15K-HU Series

Product Overview

The WIT 4-15K-HU series covers 4 kW, 5 kW, 6 kW, 8 kW, 10 kW, 12 kW and 15 kW three-phase hybrid models. The 4-6 kW models use 1 MPPT with 40 A maximum current and 2 strings; the 8-10 kW models use 2 MPPT with 20 A and 1 string each; the 12-15 kW models use 2 MPPT with 40 A and 2/1 strings. The maximum PV input voltage is 1000 V.

The battery port accepts lithium and lead-acid batteries from 40 V to 60 V at a rated 51.2 V, with charge and discharge current from 110 A to 290 A depending on model. The series provides UPS function with black start, a 10 ms transfer time, 100% three-phase unbalanced output, 2x off-grid overload for 10 s, 6-unit parallel operation, smart generator control and IP66 protection.

Key Features

• 20 A string current for high-power modules
• Up to 290 A maximum battery charge and discharge current
• 6-unit parallel operation in off-grid mode
• 100% three-phase unbalanced output
• 1.1x AC overload capability
• UPS function and black start capability
• Smart remote generator start and stop
• 1000 V maximum PV input voltage
• Type III AC surge protection
• Anti-PID protection (optional)
• AFCI arc fault detection (optional)
• OLED and LED display with APP monitoring
• Smart air cooling and IP66 protection
• 5-year / 10-year warranty

Technical Specifications

PV Input (DC)

Parameter	WIT 4K-HU	WIT 5K-HU	WIT 6K-HU	WIT 8K-HU	WIT 10K-HU	WIT 12K-HU	WIT 15K-HU
Maximum PV input power	6400 W	8000 W	9600 W	12800 W	16000 W	19200 W	24000 W
Maximum PV input voltage	1000 V
Start-up voltage	180 V
MPPT rated operating voltage	600 V
MPPT operating voltage range	150-850 V
MPPT full-load voltage range	200-750 V	250-750 V	300-750 V	400-750 V	500-750 V	400-750 V	400-750 V
Maximum input current per MPPT	40 A	40 A	40 A	20 A	20 A	40 A	40 A
Maximum short-circuit current per MPPT	50 A	50 A	50 A	25 A	25 A	50 A	50 A
Strings per MPPT	2	2	2	1	1	2/1	2/1
Number of MPPTs	1	1	1	2	2	2	2

AC Output (Grid-Tied)

Parameter	WIT 4K-HU	WIT 5K-HU	WIT 6K-HU	WIT 8K-HU	WIT 10K-HU	WIT 12K-HU	WIT 15K-HU
Rated power	4000 W	5000 W	6000 W	8000 W	10000 W	12000 W	15000 W
Maximum apparent power	4400 VA	5500 VA	6600 VA	8800 VA	11000 VA	13200 VA	16500 VA
Rated voltage / range	220/380 V, 230/400 V, -15% to +10%
Rated frequency / range	50/60 Hz, 45-55 Hz / 55-65 Hz
Maximum output current @230 V	6.4 A	7.9 A	9.6 A	12.8 A	15.9 A	19.1 A	23.9 A
Power factor	-1 to +1
THDi	<3%
Grid connection type	3P3W+PE / 3P4W+PE

AC Input (Grid)

Parameter	WIT 4K-HU	WIT 5K-HU	WIT 6K-HU	WIT 8K-HU	WIT 10K-HU	WIT 12K-HU	WIT 15K-HU
Rated power	8000 W	10000 W	12000 W	16000 W	20000 W	24000 W	30000 W
Maximum apparent power	8800 VA	11000 VA	13200 VA	17600 VA	22000 VA	26400 VA	33000 VA
Maximum input current @230 V	12.8 A	15.8 A	19.1 A	25.5 A	31.9 A	38.3 A	47.8 A

Battery

Parameter	WIT 4K-HU	WIT 5K-HU	WIT 6K-HU	WIT 8K-HU	WIT 10K-HU	WIT 12K-HU	WIT 15K-HU
Battery type	Lithium battery / lead-acid battery
Battery voltage range / rated	40-60 V / 51.2 V
Maximum charge / discharge current	110 A	125 A	150 A	200 A	220 A	250 A	290 A
BMS communication	RS485 / CAN

AC Output (Off-Grid)

Parameter	WIT 4K-HU	WIT 5K-HU	WIT 6K-HU	WIT 8K-HU	WIT 10K-HU	WIT 12K-HU	WIT 15K-HU
Rated output power	4000 W	5000 W	6000 W	8000 W	10000 W	12000 W	15000 W
Maximum output apparent power	2x rated power, 10 s
Rated output voltage	220/380 V, 230/400 V
Rated output frequency	50 / 60 Hz
Maximum output current @230 V	11.6 A	14.4 A	20.0 A	23.2 A	29.0 A	34.8 A	43.4 A
THDv	3% (linear load)
Load unbalance	100% three-phase unbalance
On/off-grid transfer time	10 ms

Efficiency

Maximum efficiency	97.60%
European efficiency	97.00%
MPPT efficiency	99.90%

Protection

Anti-backfeed protection	Available
PV input DC switch	Available
DC / AC surge protection	Type II / Type III
Insulation resistance monitoring	Available
RCD detection	Available
AC output short-circuit protection	Available
Ground fault monitoring	Available
Grid monitoring	Available
String monitoring	Available
Anti-islanding protection	Available
Anti-PID function	Optional
DC arc fault detection (AFCI)	Optional

General Data and Certification

Dimensions (W × H × D)	475 × 698 × 240 mm
Weight	38 kg
Operating temperature range	-30 °C to +60 °C (derated above 45 °C)
Noise level	≤50 dB(A)
Relative humidity	0-100%
Maximum altitude	3000 m
Topology	Transformerless
Cooling	Smart air cooling
Protection rating	IP66
Display	OLED / LED + APP
Communication ports	RS485 / USB available
Monitoring	WiFi / LAN available
Warranty	5 years standard, 10 years optional
Certification	IEC 62109, EC 61000, IEC 61727, EC 62116, IEC 61683, IEC 60068, EN 50549, VDE 4105

Applications

The series is intended for residential and small commercial three-phase PV-plus-storage systems that need backup power, high battery current and parallel expansion.

• Residential three-phase PV with storage
• Small commercial rooftop PV with storage
• Backup power for critical loads
• Off-grid sites with up to 6 parallel units
• Generator-hybrid systems with remote control
• Self-consumption optimisation

OEM & Custom Requirements

Project supply and private-label requirements can be confirmed against the standard WIT 4-15K-HU platform. Share the required power class, battery type and destination market.

• Private-label enclosure and documentation
• Power class selection from 4 kW to 15 kW
• Battery interface configuration
• Manual localisation for the target market
• Packaging and delivery planning