A5:1KW inverter is equipped with 12V battery; 2KW-3KW inverter is equipped with 24V battery; 4KW-5KW inverter is equipped with 48V battery, which can connect batteries in series or parallel

A6:Polycrystalline solar panel, monocrystalline solar panel

A7:Each inverter must first confirm the solar panel MPPT working voltage range and PV Array Power (you can check the inverter parameter table on the product page). The input voltage of the solar panel cannot exceed the maximum value; the power of the solar panel that can be connected cannot exceed the maximum value,

A8:Inverter models that can work without battery:Off-grid inverter:SML III 3.5KW; SML III 5.5KW; SMG II 3.6KW; SMG II 5.6KP; SMV III 3KW; SMV III 5KW; SMP 5KW; SMR II 5.5KW; SM IV 5.6KW;  SMV IV 5.6KW; SM II 5K PLUS; SMW 3.6KW; SMW 8KWHybrid inverter: all models can work without battery

A9:If you need inverters that can work in parallel, you can contact us before purchasing and we will recommend the model for you;

A10:Yes, but you can only connect the output of the wind turbine to the battery, not the inverter

A11: Can be connected to gasoline generators, diesel generators, the output of the generator is connected to the AC Input of the inverter,The generator power cannot be less than 2 times the inverter power

A12:According to the VMP voltage specification of the solar panel, the PV working voltage range connected to the inverter in series, and the open circuit voltage does not exceed the maximum voltage of the inverter.The PV voltage of inverter II and III models should be connected in series above 200V

A13: 1. The output power of solar panels is mainly related to light irradiance and installation angle. The power of each period will be different, it will decrease in the morning and evening, and will increase at noon. 2. The shadow effect. When the solar panel is under light and blocked, it will affect its MPPT tracking. Whether it is completely blocked or partially blocked, it will affect the output power. 3. Hot spot effect, mainly due to damage to the battery panel

A14:The no-load loss of the inverter is about 1A. For example,  24V inverter, the no-load loss is about 24W. You can refer to the manual;No-load loss is mainly reflected in: display screen, auxiliary power supply, DC-AC Conversion, booster circuit, etc.

A15:The inverter has the function of automatically starting and stopping the generator.

A16: MPPT (Maximum Power Point Tracking) is a smart charging technology that continuously tracks the optimal operating point of your solar panels, converting excess voltage into additional current to improve charging efficiency. Compared to standard controllers, MPPT can boost efficiency by 20%–30%, especially in low-light or cool conditions. All new POWLAND inverters now come standard with built-in MPPT charge controllers.

A17: POWLAND inverters are equipped with Grade A chips, offering superior stability and processing accuracy. This ensures reliable performance even under heavy loads or high temperatures, helping to minimize the risk of failure.

A18: Yes. The inverter communicates with lithium batteries via BMS (Battery Management System) to access real-time data such as voltage, current, temperature, and state of charge (SOC). This enables intelligent charge and discharge control, extending battery life and enhancing safety.

A19: Cycle life depends on the battery type:

1. Lithium (LiFePO₄): 4,000–6,000+ cycles

2. Lead-acid / Gel batteries: 500–800 cycles

Cycle life refers to the number of complete charge-discharge cycles a battery can deliver before its capacity drops to 80% of the original rating.