⚡ QB-Hi 4kW High-Efficiency PV-to-Load Off-Grid Inverter
The QB-Hi 4kW is an advanced off-grid solar inverter designed for direct solar-to-appliance power without battery storage. With a max conversion efficiency of 99%, it is the perfect entry-level solution for powering essential appliances in small homes, remote cabins, and monitoring stations directly from solar energy.
Industrial-Grade Features
☀️ 99% Efficiency & Battery-Free Operation
- Pure PV-to-Load: Specifically engineered to drive loads directly from solar panels, eliminating the cost and maintenance of batteries.
- Maximum Energy Harvest: Industry-leading 99% conversion efficiency ensures optimal utilization of every watt generated.
- Wide Voltage Range: 160VDC-390VDC MPPT working range for versatile solar array designs.
- Low Voltage Startup: Reliable operation starting from 250VDC low voltage input.
🛡️ Comprehensive Protection & Reliability
- Built-in DC SPD: Integrated surge protection device protects the system from lightning and voltage spikes.
- Multi-Layer Safety: Full protection against DC reverse polarity, AC short circuits, leakage current, and over-temperature.
- Rugged Design: Metal casing with IP21 protection and forced fan cooling for stable performance in harsh environments.
- Overload Handling: Supports 1.2 times sustained overload to handle motor and compressor startup surges.
⚙️ Smart Operation & User Interface
- One-Click Intelligence: Simplified management via an intelligent switch for easy operation.
- Real-Time Monitoring: Humanized LCD interface displays real-time PV input, load status, and operating modes.
- Pure Sine Wave: Clean 220-240V AC output safely powers sensitive electronics, fans, and small pumps.
- Mode Selection: Features 3 output mode options to optimize power delivery based on load needs.
Technical Specifications — QB-Hi Series
| Parameter |
Hi-4KW |
Hi-5.5KW |
Hi-7KW |
Hi-11KW |
| Rated Output Power |
4KW |
5.5KW |
7KW |
11KW |
| Max Input Voltage |
400VDC |
| MPPT Working Range |
160VDC–390VDC |
| Maximum Efficiency |
99% |
| Rated Output Voltage |
220/240VAC |
| Protection Functions |
DC Reverse, AC Short, Lightning, Leakage, Over-temp |
| Cooling System |
Metal Casing + Forced Fan Cooling |
Recommended Applications
🏠 Daytime Essentials
- LED Lighting, TV, and Laptops
- Fans and energy-efficient refrigeration
- Ideal for areas with reliable daytime sunshine
🏕️ Remote Infrastructure
- Remote monitoring and telecomm stations
- Direct-drive small irrigation pumps (up to 1HP)
- Mobile clinics and temporary field offices
📊 QB-Hi Series Selection Guide
4KW (This Model): Budget-friendly entry point for essential daytime loads.
5.5KW: The balanced choice for homes with medium-sized pumps or mixed loads.
7KW: Higher capacity for frequent motor starting and larger appliances.
11KW: Maximum power for heavy-duty daytime farm and industrial machinery.
Scale Your Solar System Today
Zhejiang Qibin Technology provides reliable, industrial-grade battery-free off-grid solutions. OEM/ODM supported.
📧 info@vfdinverters.com | 📱 WhatsApp: +86 183 5724 1165
Visit us: www.vfdinverters.com
