The GSL ENERGY GSL-HL Series is a 1.2kW–5.5kW single-phase off-grid hybrid solar inverter designed for residential solar systems, remote properties, small commercial facilities, and backup power applications.
Featuring an integrated MPPT solar charge controller, the inverter supports flexible power supply from solar PV, the utility grid, and generators, with or without battery storage. Selected models support parallel operation of up to nine units, allowing system expansion to 45kW.
With multiple operating modes, optional Wi-Fi monitoring, and compatibility with lithium and lead-acid batteries, the GSL-HL Series provides a versatile power conversion solution for off-grid solar installations and regions with unreliable grid infrastructure.
Compare the electrical ratings, battery compatibility, MPPT solar input, protection functions, and operating specifications of GSL ENERGY 1.2kW–5.5kW single-phase off-grid hybrid inverters.
| Specification | HL1K2 | HL3K6 | HL5K | HL5K5 | HL5K-DO |
|---|---|---|---|---|---|
| MODEL INFORMATION | |||||
| Model | GSL-HL1K2-P1EU | GSL-HL3K6-P1EU | GSL-HL5K-P1EU | GSL-HL5K5-P1EU | GSL-HL5K-P1EU_DO |
| AC INPUT | |||||
| Rated Voltage (Vac) | 208 / 220 / 230 / 240Vac, 1L+N+PE | ||||
| Rated Frequency (Hz) | 50 / 60 | ||||
| Current Maximum Continuous (Aac) | 10 | 20 | 40 | 40 | 40 |
| INVERTER OUTPUT | |||||
| Rated Power (kW) | 1.2 | 3.6 | 5 | 5.5 | 5 |
| Rated Voltage (Vac) | 208 / 220 / 230 / 240Vac, 1L+N+PE | 1L+N+PE / 2L+PE | |||
| Power Factor | 1 | ||||
| Wave Form | Pure Sine Wave | ||||
| Switch Time (ms) | <10 (Typical) | ||||
| Inverter Efficiency (Peak) | 90.5% | 92.7% | 94% | 94% | 94% |
| Current Maximum Continuous (Aac) | 5.2 | 15.6 | 22.7 | 25 | 22.7 |
| BATTERY | |||||
| Battery Type | Lithium / Lead-Acid | ||||
| Rated Battery Voltage (Vdc) | 12 | 24 | 48 | 48 | 48 |
| Battery Voltage Range (Vdc) | 10–15 | 21–30.2 | 42–56.4 | 42–56.4 | 42–56.4 |
| Max. Charge Current (Adc) | 120 | 100 | 80 | 100 | 80 |
| PV INPUT / MPPT | |||||
| No. of MPPT Tracker / String | 1 / 1 | ||||
| Max. PV Array Power (kW) | 1 | 5 | 6 | 6 | 6 |
| Max. DC Voltage PV (Vdc) | 125 | 500 | 500 | 500 | 500 |
| MPPT Voltage Range (Vdc) | 15–100 | 60–450 | 120–450 | 120–450 | 120–450 |
| Start-up Voltage (Vdc) | 20 | 60 | 120 | 120 | 120 |
| MPPT Maximum Charge Current (Adc) | 60 | 100 | 80 | 100 | 80 |
| Max. Input Current (Adc) | 14 | 18 | 18 | 18 | 18 |
| Max. PV Absolute Maximum (Adc) | 15 | 22 | 22 | 22 | 22 |
| PROTECTION & FEATURES | |||||
| Parallel Function | No | No | Yes (up to 9 pcs, optional) | No | Yes (up to 9 pcs, optional) |
| Protection Degree | IP20, Indoor Only | ||||
| Other Protection | Overload, Over-temperature, Short Circuit | ||||
| GENERAL PARAMETERS | |||||
| Storage Temperature | -15°C to +60°C | ||||
| Operating Temperature | -10°C to +50°C | ||||
| Humidity | 20%–95% (Non-condensing) | ||||
| Operating Altitude (m) | 4000 (>1000 Derating) | ||||
| Noise (dB) | <50 | ||||
| Machine Weight (kg) | 3.2 | 6.5 | 8.6 | 8.6 | 9.6 |
| DISPLAY & COMMUNICATION | |||||
| Display | LCD Display (Display Running Mode, Loads, Input / Output, etc.) | ||||
| Interface | RS485 / CAN / Dry Contact / WiFi (Optional) | ||||
Note: Specifications may change without prior notice. Parallel operation is available only on supported models with the appropriate optional configuration. Confirm final electrical specifications and certification documents with GSL ENERGY before procurement.
Discover the flexible power conversion capabilities of the GSL ENERGY 1.2kW–5.5kW single-phase off-grid hybrid solar inverter series, designed for residential solar installations, battery backup systems, and light commercial power applications.
The GSL-HL Series is developed for locations where grid electricity is unavailable, unreliable, or requires additional backup support. With rated output options from 1.2kW to 5.5kW, the series accommodates different electricity demands, from basic household appliances to larger residential and light commercial loads.
Unlike conventional solar inverters that depend entirely on one energy source, the GSL-HL Series can coordinate power from solar panels, batteries, the utility grid, and generators. This flexibility allows installers to configure off-grid solar power systems around local electricity conditions, available solar resources, and customer budgets.
Each GSL-HL inverter features an integrated MPPT solar charge controller designed to optimize energy harvesting from connected PV modules.
The series offers model-dependent PV input configurations, with maximum PV array power reaching 6kW on selected models. This makes it suitable for residential solar installations where efficient solar energy utilization is an important consideration.
By combining solar power conversion and battery charging functions in one unit, the inverter reduces the need for separate external charge controllers in compatible system configurations.
One of the practical advantages of the GSL-HL Series is its ability to operate with or without connected batteries.
For installations where customers initially want solar power without investing in battery storage, the inverter provides a flexible starting point. Battery storage can be considered as part of the system design when backup duration or energy management requirements increase.
The series supports compatible lithium-ion and lead-acid battery configurations, with 12V, 24V, and 48V battery voltage options depending on the inverter model.
Solar power requirements often increase after the initial installation. A household may add appliances, while a small commercial facility may require additional electrical capacity.
Selected GSL-HL models support parallel operation of up to nine inverter units, enabling a single-phase off-grid system with a maximum combined rated output of 45kW.
This scalable architecture allows system designers to accommodate larger loads through compatible multi-inverter configurations rather than replacing the entire power conversion platform.
Parallel operation availability and installation requirements must be confirmed for the selected inverter model.
The GSL-HL Series is particularly suitable for regions where utility electricity is intermittent or unavailable.
The inverter can form part of an off-grid energy architecture combining solar PV, battery storage, utility power, and generator supply.
For remote homes, agricultural properties, rural businesses, and small commercial facilities, this approach provides greater flexibility in how electricity is supplied and managed.
The inverter includes an LCD interface for viewing operating information and system status.
Optional Wi-Fi connectivity enables remote monitoring through supported communication services, allowing installers and system operators to review inverter performance without relying exclusively on on-site inspections. This functionality is particularly useful for solar installers and distributors managing multiple installations across different locations.
The GSL-HL Series incorporates protection functions for overload, overtemperature, and short-circuit conditions.
Its specified operating temperature range is -10°C to +50°C, making it suitable for a variety of indoor installation environments, subject to appropriate ventilation and installation conditions.
The series is designed to provide dependable off-grid power conversion for residential and light commercial applications where energy availability and system flexibility are important.
The GSL-HL Series can be configured for different solar power and battery backup requirements across residential, agricultural, and light commercial installations.
Solar power solutions for homes, cabins, and remote properties without reliable utility connections.
Integration with compatible battery storage systems to support household electricity needs during grid interruptions.
Solar inverter applications for farms, rural buildings, and small agricultural facilities.
Off-grid and backup power solutions for shops, offices, workshops, and other light commercial installations.
A multi-model inverter portfolio suitable for distributors, installation contractors, and system integrators serving different off-grid solar markets.
GSL ENERGY supplies residential and commercial energy storage equipment, including LiFePO4 batteries, solar energy storage systems, and hybrid inverter solutions.
The GSL-HL Series extends this portfolio with flexible off-grid power conversion options for solar installers, energy storage distributors, and project integrators.
For bulk procurement and OEM/ODM project requirements, GSL ENERGY can discuss suitable inverter configurations, battery integration, branding requirements, and project-specific supply arrangements.