1stess 5.5kW / 6.2kW 48V Hybrid Solar Inverter
The 1stess GM5500-48PL and GM6200-48PL hybrid solar inverters combine PV power conversion, battery charging and pure sine wave AC output in a single-phase platform. Available with 5.5kW or 6.2kW rated output, both models support a nominal 48V battery system, a 60-500V DC MPPT range and parallel operation of up to 12 units. The series provides importers, distributors, procurement teams and EPC contractors with two options for residential and small commercial solar storage projects.
Hybrid Solar Inverter for Solar and Battery Integration
Select a 1stess 48V hybrid inverter to match the power demand, PV array and battery configuration of your project. The series includes grid-tie, off-grid and hybrid operating specifications, with nominal 220/230/240V AC output and a pure sine wave output in battery mode.
The front LCD and control buttons provide a local interface, while RS232, RS485 and an external CT port support system integration. Grid-connected use and associated operating settings should be confirmed for the project destination.
Choose the Right Power Rating
The GM5500-48PL provides 5500W rated output, up to 5500W PV input and a maximum solar charging current of 100A. The GM6200-48PL increases rated output to 6200W, maximum PV input to 6500W and maximum solar charging current to 120A.
Both models feature one MPPT tracker. Maximum PV input current is 18A for the GM5500-48PL and 27A for the GM6200-48PL. These differences help system designers select an inverter against the intended module configuration and charging requirements.
Technical Specifications
| Specification |
GM5500-48PL |
GM6200-48PL |
| Rated output power |
5500VA / 5500W |
6200VA / 6200W |
| Maximum PV input power |
5500W |
6500W |
| Phase |
Single-phase input / output |
Single-phase input / output |
| Nominal battery voltage |
48V DC |
48V DC |
| MPPT voltage range |
60-500V DC |
60-500V DC |
| Maximum PV DC voltage |
500V DC |
500V DC |
| MPPT trackers |
1 |
1 |
| Maximum PV input current |
18A |
27A |
| Nominal AC output voltage |
220/230/240V AC |
220/230/240V AC |
| Battery-mode output waveform |
Pure sine wave |
Pure sine wave |
| Maximum DC/AC conversion efficiency |
94% |
94% |
| Maximum solar charging current |
100A |
120A |
| Maximum AC charging current |
80A |
80A |
| Maximum charging current |
100A |
120A |
| Parallel function |
Up to 12 units |
Up to 12 units |
| Lithium battery activation |
By PV or utility |
By PV or utility |
| Lithium battery communication |
Supported; protocol to be confirmed |
Supported; protocol to be confirmed |
| Communication interfaces |
RS232, RS485, external CT port |
RS232, RS485, external CT port |
| Net weight |
11kg |
12kg |
| Operating temperature |
−10°C to +50°C |
−10°C to +50°C |
| Relative humidity |
5-95%, non-condensing |
5-95%, non-condensing |
Specifications are based on the supplied product data. Confirm the final model configuration and current technical documentation when ordering.
48V Battery Storage and Charging
Both hybrid solar inverter models support lithium battery communication and battery activation using PV or utility power. Their nominal 48V battery platform can be evaluated for solar battery storage and backup power applications.
For each installation, confirm the battery operating voltage range, BMS protocol, charge and discharge limits, cable requirements and system settings. Battery compatibility depends on the selected battery and inverter configuration.
Parallel Operation and Project Expansion
The series supports parallel operation of up to 12 units. This gives project teams a basis for evaluating multi-inverter configurations as system requirements develop. Confirm supported model combinations, parallel accessories, firmware and system design before specifying a parallel installation.
Procurement Support for Importers and EPC Contractors
For product selection and project quotations, send 1stess your target model, order quantity, destination, required AC voltage, load profile, PV module specifications and battery details. For integrated solar storage systems, include the installation environment, cabinet arrangement and communication requirements.
This information helps align the inverter specification with distribution requirements, installation planning and project documentation.
Specify Your Next Solar Storage Project
Contact 1stess with your model, quantity and system requirements to request a product datasheet and project quotation.
Request a Quotation
Frequently Asked Questions
What is the difference between the 5.5kW and 6.2kW models?
The GM5500-48PL has 5500W rated output, 5500W maximum PV input, 18A maximum PV input current and 100A maximum solar charging current. The GM6200-48PL has 6200W rated output, 6500W maximum PV input, 27A maximum PV input current and 120A maximum solar charging current.
Is 48V the AC output voltage?
No. 48V DC is the nominal battery system voltage. The specified nominal AC output voltage is 220/230/240V AC.
Does the inverter support lithium batteries?
The supplied specifications list lithium battery communication and activation by PV or utility. Confirm the battery BMS protocol, operating voltage range and approved configuration before ordering.
What is the MPPT input range?
Both models list a 60-500V DC MPPT range and one MPPT tracker. PV string design must also account for startup requirements, the maximum DC voltage and the model-specific input current limit.
Can multiple inverters operate in parallel?
The specifications list support for up to 12 units in parallel. Confirm the required accessories, supported inverter combinations and project configuration with 1stess.
Which communication interfaces are available?
The technical data lists RS232, RS485 and an external CT port. Confirm the required protocol and interface details against the installation documentation.
Are batteries and cabinets included?
Application images illustrate possible system arrangements. Batteries, cabinets, protective devices and other accessories should be itemized separately in the quotation.
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