Inverters & Power Conversion
Off-Grid Inverter
(GF3K24H / GF3K24L / GF5K48H / GF5K48L)
A single-phase off-grid inverter series combining MPPT solar charging, dual voltage-input flexibility, and compatibility with both lithium-ion and lead-acid batteries — engineered to deliver stable power in locations without reliable grid access.
Key Features
The GF-series off-grid inverter pairs flexible multi-mode operation with efficient solar charging and dual battery-type support, giving installers a dependable core for residential and light-commercial off-grid systems.
Flexible Multi-Mode Operation
Configure multiple working modes to match different power-source priorities and usage scenarios.
Real-Time Remote Monitoring
Built-in WiFi module enables live system monitoring, making maintenance and diagnostics easier.
User-Friendly LCD Interface
Graphical LCD with keypad controls simplifies setup, monitoring, and daily operation.
Dual Battery Compatibility
High charge/discharge efficiency supports both lithium-ion and lead-acid battery banks.
MPPT Solar Charging
Integrated MPPT controller tracks up to 6000W of PV input for efficient solar utilization.
Parallel Expansion (GF5K Series)
Up to 6 units can be paralleled for scalable off-grid power capacity.
OEM & ODM Capabilities
The GF-series off-grid inverter platform supports flexible customization across power ratings, voltage configurations, and branding — suitable for regional distributors and system integrators.
Custom Voltage & Frequency Configurations
Output voltage and frequency can be configured for regional grid standards (100V/110V/120V or 220V/230V/240V, 50Hz/60Hz).
Branded Enclosure & Labeling
Housing color, front-panel branding, and packaging can be customized to OEM/ODM specifications.
Flexible Power Ratings
Rated power configurations from 3000VA to 5000VA available to match project requirements.
Battery Interface Customization
Charging voltage curves and battery-type presets can be adjusted for lithium or lead-acid banks.
Communication Protocol Options
USB/RS485/RS232, dry contact, and WiFi communication modules available for third-party monitoring integration.
Small-to-Large MOQ Support
Flexible order quantities supported for both trial orders and large-scale project deployments.
Technical Specifications
Full electrical parameters for all four GF-series models — model-specific values are broken out in the table below where they differ.
| Rated Power | 3000VA/3000W (GF3K series) · 5000VA/5000W (GF5K series) |
|---|---|
| Battery Type | Lead-acid battery / lithium battery |
| Rated Battery Voltage | 24VDC (GF3K series) · 48VDC (GF5K series) |
| PV Charging | MPPT |
| Max. PV Input Power | 4000W (GF3K series) · 6000W (GF5K series) |
| MPPT Operation Voltage Range | 120–430VDC |
| Parallel Function | Not supported (GF3K series) · Up to 6 units (GF5K series) |
| Operating Environment | -10°C to 50°C |
| Model | Rated Power | Battery Voltage |
|---|---|---|
| GF3K24H | 3000VA/3000W | 24VDC |
| GF3K24L | 3000VA/3000W | 24VDC |
| GF5K48H | 5000VA/5000W | 48VDC |
| GF5K48L | 5000VA/5000W | 48VDC |
| Parameter | GF3K24H | GF3K24L | GF5K48H | GF5K48L |
|---|---|---|---|---|
| Rated input voltage | 230VAC | 120VAC | 230VAC | 120VAC |
| Input voltage range | 170–280VAC (PC) / 90–280VAC (home) | 90–140VAC | 170–280VAC (PC) / 90–280VAC (home) | 90–140VAC |
| Rated input current | 20A | 36A | 32A | 61.33A |
| Max. input current | 30A | 40A | 40A | 80A |
| Rated AC output voltage | 230VAC | 120VAC | 230VAC | 120VAC |
| Output settable voltage | 220V/230V/240V | 100V/110V/120V | 220V/230V/240V | 100V/110V/120V |
| Rated AC output current | 13.05A | 25.00A | 21.70A | 41.67A |
| Surge power | 6000VA, 5 cycles | 6000VA, 5 cycles | 10000VA, 5 cycles | 10000VA, 5 cycles |
| Max. PV input current | 18A | 18A | 27A | 27A |
| Max. PV charging current | 100A | 100A | 100A | 100A |
| Max. AC charging current | 100A | 100A | 100A | 100A |
| Max. battery charging current | 100A | 100A | 100A | 100A |
| Rated discharge current | 130A | 130A | 113.7A | 113.7A |
| Charging voltage | 27VDC default, 24–29.2VDC settable | 27VDC default, 24–29.2VDC settable | 54VDC default, 48–58.4VDC settable | 54VDC default, 48–58.4VDC settable |
| Overcharge protection voltage | 30.2VDC | 30.2VDC | 60.5VDC | 60.5VDC |
| Dimension (W×D×H, mm) | 322×122×390 | 322×122×390 | 342×122×471 | 332×142×420 |
| Net weight | 9kg | 9kg | 11kg | 12kg |
| Communication interfaces | USB/RS485, dry contact, WiFi (optional) | USB/RS485, dry contact, WiFi (optional) | USB/RS232/RS485, dry contact, WiFi (optional) | USB/RS485, dry contact, WiFi (optional) |
Construction & Configuration
The numbered diagram below highlights the key functional zones of the GF-series off-grid inverter, from the front-panel interface to the internal charging and protection systems.
Graphical LCD Display Panel
Front-panel icon-based LCD screen and keypad for mode selection, status monitoring, and quick configuration access.
MPPT Solar Charge Controller
Integrated MPPT module tracks PV array output up to 6000W for efficient solar-to-battery charging.
Battery Input Terminal
Rated 24VDC (GF3K) or 48VDC (GF5K) terminal supporting both lithium-ion and lead-acid battery banks.
AC Input/Output Terminal Block
Dual-purpose terminal handles grid/generator input and connected load output with overload protection.
Communication Port Array
USB, RS485/RS232, dry contact and optional WiFi module for remote monitoring and third-party system integration.
Cooling & Protection Housing
Fan-cooled IP20 enclosure with over/under-voltage, over/under-frequency, overload, short-circuit, and overtemperature protection.
Standards & Test Documentation
The GF-series off-grid inverter is built around a multi-layer protection design and supported by full technical documentation for installation and system integration.
Multi-Layer Protection System
Built-in input/output over- and under-voltage protection, over/under-frequency protection, output overload and short-circuit protection, radiator overtemperature protection, and fan fault detection.
IP20 Indoor-Rated Housing
Rated for indoor and sheltered installation environments, with an operating temperature range of -10°C to 50°C.
Technical Support & Documentation
Wiring diagrams, parallel-connection guides, and communication protocol documentation are available to support installation and system integration. Contact our team for full technical datasheets.
Ready to spec your off-grid power system?
Send us your voltage, battery type, and site requirements — our team will help you select the right GF-series configuration or discuss OEM/ODM customization.