6.5kW 48V Off Grid Solar Inverter

The GA-6548 is an all-in-one power solution meticulously designed by KTAC for areas with no grid access or unstable grid conditions. By integrating a pure sine wave inverter, an MPPT solar charger, and an AC charger into a compact unit, 6.5KW 48V Off Grid Solar Inverter significantly reduces system wiring and space requirements while enabling intelligent, coordinated management of three energy sources: PV, grid power, and batteries.

Whether you are building a new Off Grid home, upgrading an existing backup power system, or powering a remote base station, the GA-6548 meets your needs with outstanding performance and flexible configuration options.

Core Inverter Performance

The GA-6548 delivers a rated output power of 6500W and a peak power of 12000VA, easily handling the high inrush currents required to start inductive loads like refrigerators and air conditioners. It produces a pure sine wave output and supports a maximum PV input power of 9000W with a maximum PV open-circuit voltage of 500V.

Compared to low-voltage PWM controllers, MPPT technology boosts PV energy harvesting efficiency by 20%–30%—a distinct advantage during cloudy days or periods of low sunlight. The system supports hybrid charging (PV and AC), allowing users to set charging priorities such as solar-first, grid-first, or hybrid charging based on weather conditions and electricity rates, thereby maximizing renewable energy utilization and reducing electricity costs. Users can configure battery charging current, AC/solar charging priority, and input voltage ranges via the LCD panel to suit specific needs.

The device supports RS232, RS485, and CAN communication interfaces, enabling seamless integration with lithium battery BMS systems. Its detachable dust-proof cover design makes it suitable for use in various challenging environments.

Additionally, an optional WiFi monitoring module allows users to remotely view system status, historical power generation, and alarm logs via a mobile app (iOS/Android) or web platform. Users can also modify parameters and upgrade firmware online, greatly simplifying daily management for unattended sites or residential users.

The 6.5KW 48V Off Grid Solar Inverter is a high-efficiency, highly compatible, and intelligent Off Grid hybrid inverter. When paired with KTAC’s 51.2V LiFePO4 battery packs, it creates a stable, durable, and remotely monitorable energy storage system, ideal for residential backup power, remote area electrification, and small-scale commercial/industrial energy storage.

Product Parameter

What are the key advantages?

1. Pure Sine Wave Output

The GA-6548 delivers clean AC output with a pure sine wave and low total harmonic distortion (THD), ensuring safe operation for household appliances, power tools, and precision electronics. In battery mode, it supports a surge power of up to 12,000 VA, easily handling the high inrush currents required to start inductive loads like motors and compressors.

2. High-Efficiency MPPT Solar Charging

It features a built-in MPPT controller with a maximum PV input power of 9,000 W and a maximum PV charging current of 120 A. With an MPPT voltage range of 60–450 V and a maximum open-circuit voltage of 500 V, it flexibly accommodates high-voltage PV arrays, significantly boosting energy harvesting efficiency.

3. Broad Compatibility and Intelligent Charging

It supports both 48 V lithium and lead-acid batteries, with a float voltage of 54 V and overcharge protection at 61 V. The maximum AC charging current is 120 A, and the combined PV+AC charging current can reach 120 A. The device automatically optimizes charging curves based on the battery type to extend battery lifespan.

4. Flexible Operating Modes

Offers Mains, UPS, and Generator modes, with switching times of just 10ms (UPS mode) or 20ms (Generator mode). Users can prioritize solar power, mains power, or hybrid charging to maximize renewable energy utilization.

5. Intelligent Monitoring & Communication

Comes standard with RS232/RS485/CAN communication interfaces and supports optional WiFi remote monitoring. Users can view system status and historical data, adjust parameters, and perform firmware upgrades via a mobile app or web portal. It also features dual AC output ports, allowing for zoned management of critical and non-critical loads.

6. Reliable Protection & Wide Operating Temperature

The 6.5kW 48V Off Grid Solar Inverter features an IP21 protection rating, an operating temperature range of -15°C to 60°C, and a relative humidity range of 5% to 95% (non-condensing). It supports operation at altitudes up to 4,000m (with derating above 1,000m), making it suitable for diverse global climates and geographical conditions.

Product Applications

1. Residential Off Grid PV Systems: Provides daily electricity for areas without grid access or with unstable grids; utilizes solar power during the day and battery storage at night.

2. Backup Power Supply: Automatically switches to battery power during grid outages, ensuring the continuous operation of critical loads such as refrigerators, lighting, and communication equipment.

3. Outdoor & Remote Power Supply: Suitable for Off Grid locations such as remote cabins, farms, communication base stations, and surveillance outposts.

4. Small-Scale Residential Energy Storage: Pairs with 48V lithium battery packs to provide an economical and reliable Off Grid or backup power solution for small households.

Customization Services

Visual Branding – Enclosure color and logo printed to your brand specification

BMS Protocol Matching – Pre-tuned for third-party lithium batteries (CAN/RS485)

Parameter Presets – Default voltages, frequency, and charging priorities set per your request

Packaging & Documentation – Custom box design + multilingual manuals

Lead time for custom orders: 10–15 days.

Warranty & Support

Standard Warranty – 2 years for general-purpose models

Extended Warranty – 3 years for selected heavy-duty models (please inquire)

Technical Response – 48-hour email/WhatsApp reply

Spare Parts – Available for quick dispatch

Remote Assistance – Video call guidance for installation and troubleshooting

Contact us to confirm warranty terms for your specific model.

FAQ

1. Can the GA-6548 be connected in parallel to increase power output? 

This is the standard model and does not support parallel operation of multiple units. For higher power requirements (e.g., 12kW), please select the GA-12048 model or contact KTAC for a customized parallel connection solution.

2. Can it charge using both PV panels and grid power simultaneously?

Yes. The device supports hybrid charging from PV and grid sources; users can configure charging priorities (Solar Priority, Grid Priority, or Hybrid Charging), with a maximum total charging current of 120A.

3. Is the 6.5kW 48V Off Grid Solar Inverter compatible with 51.2V LiFePO4 batteries?

Yes, it is compatible. The nominal voltage for 48V lithium battery systems is typically 51.2V; the float voltage (54V) and overcharge protection voltage (61V) are fully compatible. BMS integration is supported via CAN or RS485 communication interfaces.

4. What precautions should be taken when operating in high-temperature environments?

The operating temperature range is -15°C to 60°C. When the ambient temperature exceeds 40°C, the device may automatically derate its output to protect internal components. Installation in a well-ventilated area away from direct sunlight is recommended.

5. How can the system status be monitored remotely?

With the optional WiFi monitoring module, you can view real-time data such as power generation, load power, and battery status and receive fault alerts via a mobile app (iOS/Android) or a web-based platform.