Sunbird 3000

True Bi-Directional, Battery-Independent Solar Inverter

• Functions as a solar inverter even without a battery connected , solar power can be exported or consumed directly without requiring battery storage in the system.
• When batteries are present, battery charging through the grid is supported up to 100%, and a selectable priority feature lets the system be configured to draw preferentially from grid or battery.
• Higher array voltage capacity is optionally available for sites with larger or higher-voltage PV strings.

MPPT Charging Built on Incremental Conductance

• MPPT (Maximum Power Point Tracking) is achieved through incremental conductance algorithms, which track the array's actual power curve rather than relying on simpler voltage-sweep methods , relevant for maintaining harvest efficiency under partial shading or rapidly changing irradiance.
• The charge controller uses an IGBT device with PWM switching based on Space Vector technology, matching the same switching philosophy used on the inverter side.

Modular Construction for Faster Repair

• Modular internal construction is specifically called out as giving higher MTTR , meaning a fault in one module can be diagnosed and swapped without taking down the whole unit or requiring a full rebuild.
• Multiple 32-bit DSP controllers distribute control functions rather than relying on a single processor for the entire unit.

Grid-Interactive Power Quality Features

• PF (power factor) correction while operating on mains/grid supply (line-interactive mode).
• Active filtering when load is on mains, with harmonic correction capability at 100% load , THDi under 5%, power factor above 0.9, and harmonic attenuation ratio up to 96%.
• Output voltage distortion under 2% with 100% linear load, and voltage regulation held to ±2% across 3-phase, 4-wire, 50Hz output.

Built for Reliability and Serviceability

• DC fan design for lower power consumption during cooling.
• Variable fan speed increases reliability and results in less dust suction into the cabinet compared to a fixed-speed fan running continuously at full speed.
• Inbuilt isolation transformer provides galvanic isolation at the inverter output, protecting connected equipment from DC injection and improving fault isolation.
• 128 x 64 graphics display (LCD with mimic) shows array/battery/grid voltage, current, and power; output voltage, current, and inverter heat-sink temperature; and power statistics (grid kWh, PV kWh, output kWh, battery charge/discharge).

Comprehensive Protection and Diagnostics

• Under/over-voltage protection across input, output, array, and battery, plus array and battery reverse-polarity protection.
• Output overload and short-circuit protection, over-temperature protection, and MCCB protection on input, output, array, and battery paths.
• Surge protection for both grid and array connections, plus wound-component over-temperature protection.
• Built-in alarm log (240 entries) and data log (268 entries), expandable to lifetime data logging via SD card.
• Remote monitoring and communication via Ethernet (RJ45), RS232, or RMS with GPRS.

Applications

• Commercial and industrial rooftop/ground-mount solar with backup – battery-independent operation means the same unit works whether the site starts with solar-only or adds battery storage later.
• Sites needing grid power-quality correction alongside solar – PF correction and active harmonic filtering while on mains supply make Sunbird 3000 useful even during periods when solar generation is low.
• Facilities requiring fast fault recovery – the modular design's higher MTTR characteristic suits critical or continuously-operating loads where downtime for repair needs to be minimized.
• Larger-capacity installations – the 10–400 KW range, with optionally higher array voltage capacity, scales from a single-building system to a larger industrial or facility-wide solar-hybrid installation.