Product Short Description
Product Name: STI300 Power Frequency Pure Sine Wave Inverter
Product Overview:
EPEVER STI300 is an off-grid pure sine wave DC-AC inverter designed for solar photovoltaic energy storage systems. It converts direct current from battery bank into stable alternating current for AC loads.
Description
- Continuous Rated Power: 300 VA
- Surge Power: 960 VA (1.5 seconds)
- DC Input: 12 VDC or 24 VDC
- Input Voltage Range: 10.5–16 VDC (12V model); 21–32 VDC (24V model)
- AC Output Waveform: Pure Sine Wave
- Output Voltage: 220 VAC / 230 VAC ±3%
- Output Frequency: 50 Hz ±0.2%
- THD: ≤3% under resistive load
- Max Efficiency: ≥90%
- No-Load Power Consumption: ≤5 W
- Operating Temperature: -20°C ~ +50°C
Function Features:
- Complete electrical protection: reverse polarity, short circuit, overload, over-temperature, low/high battery voltage
- LED status indicator for operation, fault and load level
- Isolated power conversion topology
- Optional energy-saving standby mode
- Excellent EMC performance
Application Scenarios:
Off-grid solar power systems, remote household power supply, mobile equipment, small industrial AC loads, outdoor emergency power.
Material Composition:
Aluminum alloy heat dissipation housing; power IGBT switching devices; high-frequency isolation transformer.
Structural Characteristics:
Horizontal chassis mounting structure. Built-in cooling fins with passive thermal dissipation; terminal blocks for battery DC input and AC output.
Working Principle:
DC power from battery passes through high-frequency boost circuit, then SPWM inversion circuit to generate filtered pure sine wave alternating current. Protection circuit continuously monitors voltage, current and internal temperature.
Installation Requirements:
Install in well-ventilated space without direct sunlight. Use adequately sized copper cables for battery connection. Leave clearance around unit for heat dissipation.
Usage Notes:
Do not connect inductive heavy startup loads exceeding surge rating. Disconnect battery before internal maintenance. Avoid continuous operation above 45°C ambient temperature.
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