New Basic 1 to 5 kW Off Grid Inverters

The New Basic Series is a practical single-phase inverter platform for small and medium standalone power systems. It combines pure sine-wave AC output with battery charging and selectable utility-input ranges, enabling the system to supply conventional household loads while accepting the grid or a generator as an auxiliary source when required.

The series provides both PWM and MPPT versions at the same nominal power levels. PWM variants offer a straightforward architecture for cost-sensitive systems with suitably configured PV strings. MPPT variants provide a defined tracking window and improve PV operating flexibility, particularly where module voltage and changing irradiation conditions require active maximum-power-point control.

Battery-bank voltage rises with inverter capacity: 12 V for the 1 kW models, 24 V for the 3 kW models, and 48 V for the 5 kW models. This progression supports more appropriate current levels as system power increases. All six variants provide pure sine-wave output, automatic transfer between operating sources, overload-oriented surge capacity, and USB/RS232 communication.

The correct model should be selected by considering continuous demand, short-duration starting current, battery voltage, PV open-circuit voltage at the lowest expected site temperature, solar-charger architecture, and required charging current. PWM and MPPT variants must not be treated as interchangeable because their PV voltage limits and array-sizing logic are different.

Key Features

• Six model options across 1 kW, 3 kW, and 5 kW
• PWM and MPPT solar-charger alternatives
• Pure sine-wave single-phase AC output
• Grid and generator input compatibility
• Selectable input range for computer or household-load profiles
• Cold-start capability
• Automatic source-transfer operation
• Overload and short-circuit protection architecture
• 12 V, 24 V, and 48 V battery-bank options
• USB/RS232 communication interface

Recommended Applications

• Cabins, rural houses, and compact standalone homes
• Security, monitoring, and telecom installations
• Farm offices, barns, lighting, and service loads
• Small shops and workshops in unreliable-grid areas
• Generator-assisted battery systems
• Refrigeration, communication, lighting, and electronic loads
• Entry-level residential solar-storage systems

Engineering and Selection Notes

• Match the battery bank exactly to the model voltage: 12 V, 24 V, or 48 V.
• For MPPT versions, design the operating string voltage inside the stated MPPT range and calculate cold-weather string open-circuit voltage below the model's maximum PV open-circuit limit.
• For PWM versions, PV-array voltage must be configured for the PWM charger and connected battery system; MPPT string-sizing logic must not be applied.
• Surge capacity is intended for short-duration starting demand and does not replace continuous-load sizing.
• Where motors, compressors, pumps, or refrigeration equipment are present, check both starting current and simultaneous-load behaviour before selecting inverter power.