KR Series (3500-6000W) Inverter/Charger
Off-grid Inverter Charger: Discover the KR Series (3500-6000W), perfect for off-grid energy solutions, featuring smart management and robust protection.
The KR Series Inverter/Charger, an off-grid inverter charger, combines state-of-the-art technology with practical applications, making it ideal for residential, school, and health facilities, government buildings, and areas where the electricity is unstable. It supports dual AC output, solar charging, and utility integration, providing seamless power solutions.
With capacities ranging from 3500W to 6000W and enhanced by smart energy management, this series ensures reliable power delivery under varying conditions. Its modular design facilitates easy installation and expansion, supporting parallel operation in single or three-phase setups.
Comprehensive electronic protections and a robust design make the KR Series a dependable choice for managing your energy needs effectively.
| Model | KR3522-1250P20/C | KR3542-0650P20/C | KR5542-1050P20/C | KR6042-1250P20C |
| Utility input | ||||
| Utility Input Voltage | 176VAC to 264VAC (Default), 90VAC to 285VAC (Configurable) | |||
| Utility Input Frequency | 45Hz to 65Hz | |||
| Maximum Utility Charging Current | 110A | 60A | 100A | |
| Switch Response Time | Switch Response Time – Inverter to Utility: 10ms Switch Response Time – Utility to Inverter (when the load power is higher than 100W): 20ms |
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| Inverter output | ||||
| Inverter Rated Power (@30℃) | 3500W | 5500W | 6000W | |
| 3-second Transient Surge Output Power | 7000W | 8500W | 12000W | |
| Inverter Output Voltage | 220/230VAC±3% | |||
| Inverter Frequency | 50/60Hz±0.2% | |||
| Output Voltage Waveform | Pure sine wave | |||
| Load Power Factor | 0.2–1(VA ≤ Rated output power) | |||
| THDu (Total Harmonic Voltage Distortion) | ≤3% (24V resistive load) | ≤3% (48V resistive load) | ||
| Maximum Load Efficiency | 0.92 | |||
| Maximum Inverter Efficiency | 0.94 | |||
| Maximum Main Load | 3500W | 3500W | 5500W | 6000W |
| Maximum Second Load | 3500W | 3500W | 5500W | 6000W |
| Main Output Cut-Off Voltage | Equal to “UVW (Under Voltage Warning Voltage)” | |||
| Second Output Cut-Off Voltage | Equal to “LVD (Low Voltage Disconnect Voltage)” | |||
| Dual Output Recovery Voltage | Equal to “LVR (Low Voltage Reconnect Voltage)” | |||
| Solar controller | ||||
| PV Maximum Open-circuit Voltage | 500V (At minimum operating environment temperature); 440V (At 25℃) |
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| MPPT Voltage Range | 85V to 450V | |||
| Number of MPPTs | 1 | 1 | 2 | 2 |
| PV Maximum Input Current | One way, 16A/way | One way, 16A/way | Two ways, 2x16A | Two ways, 2x16A |
| PV Maximum Short-circuit Current | One way, 18A/way | One way, 18A/way | Two ways, 2x18A | Two ways, 2x18A |
| PV Maximum Input Power | 4200W | 4200W | 2×3300W | 8000W |
| PV Maximum Charging Current | 120A | 60A | 100A | 120A |
| MPPT Maximum efficiency | ≥99.5% | |||
| Battery | ||||
| Battery Rated Voltage | 24VDC | 48VDC | ||
| Battery Work Voltage Range | 20.4VDC to 32.0VDC | 40.8VDC to 64.0VDC | ||
| Battery Maximum Charging Current | 120A | 60A | 100A | 120A |
| Others | ||||
| No-load Losses | ≤1.5A | ≤0.8A | ≤1.1A | |
| Test condition: Utility, PV and Load are disconnected, AC output is ON, fan stops, @24V input | Test condition: Utility, PV and Load are disconnected, AC output is ON, fan stops, @48V input | |||
| Standby Current | ≤1.1A | ≤0.6A | ≤0.8A | |
| Test condition: Utility, PV and Load are disconnected, AC output is OFF, fan stops, @24V input | Test condition: Utility, PV and Load are disconnected, AC output is OFF, fan stops, @48V input | |||
| Communication with BMS | RS485 | |||
| Communication with Portal | RS485 | |||
| Parallel Function | Yes, 12 units in standard, 16 units at most | |||
| Work Temperature Range | -20℃ to +50℃ (When the environment temperature exceeds 30℃, the actual output power is reduced appropriately) | |||
| Storage Temperature Range | -25℃ to +60℃ | |||
| Enclosure | IP20 (With ANTI-DUST KIT) | |||
| Relative Humidity | < 95% (N.C.) | |||
| Altitude | <4000M (If the altitude exceeds 2000 meters, the actual output power is reduced appropriately) | |||
| Certifications and Standards | IEC 62109-1, IEC 62109-2, IEC 61683, IEC 62368 | IEC 62109-1，IEC 62109-2，IEC 61683 | ||
| Mechanical parameters | ||||
| Dimension (Length x Width x Height) | 590mm × 300mm × 163mm | 534mm × 300mm × 163mm | 590mm × 300mm × 163mm | 590mm × 300mm × 165mm |
| Mounting size (Length x Width) | 568mm × 245mm | 512mm × 245mm | 568mm × 245mm | 568mm × 245mm |
| Mounting hole size | Φ9mm/Φ10mm | Φ9mm/Φ10mm | Φ9mm/Φ10mm | Φ9mm/Φ10mm |
| Net Weight | 13.8Kg | 12.7Kg | 15.5Kg | 15Kg |
Manual
EPEVER-Manual-KR/KRP
Manual
EPEVER-Manual-KR/KRP(C)
DataSheet
EPEVER-DataSheet-KR(C)
Product Highlights
Applicable for pure off grid / backup power / self-consumption
PV input voltage range: 80Vdc-500Vdc
PV input current up to 32A
Supports battery mode & non battery mode
Battery & PV reverse polarity protection
Dual pure sine wave output
Supports single-phase or three-phase parallel operation (up to 16 units)
Sleep mode triggered by low power output or low battery voltage
Independent BMS communication interface
Isolated RS485 interface：Connects with Bluetooth, WiFi, 4G, etc.
Optional 320 x 480 high-resolution color LCD screen or monochrome screen
Historical data recording function, storage capacity of 25000 records
Comprehensive electronic protection ensures safer and more stable operation
IP20 enclosure design with anti-dust kit
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