逆变器选型计算器
使用逆变器选型计算器确定太阳能系统的最佳逆变器规格。输入太阳能板总功率和系统电压，计算所需逆变器容量kW，确保系统高效安全运行。
Recommended Inverter Size
6,667 W
Recommended Inverter Size vs Total Panel Wattage (DC)
公式
Solar Inverter Sizing
The inverter converts DC power from solar panels to AC power for home or grid use. It is typically sized smaller than the total panel capacity.
Formula
Inverter Size (W) = Total Panel Wattage / DC-to-AC Ratio
A DC-to-AC ratio of 1.1-1.3 is standard. This means the inverter is smaller than the panel array. This is efficient because panels rarely produce their full rated power simultaneously. A ratio of 1.2 means 20% overbuilding on the DC side, which captures more energy during low-light hours with minimal clipping losses at peak.
计算示例
An 8 kW (8,000 W) panel array with a 1.2 DC-to-AC ratio.
- 01Inverter size = 8,000 / 1.2 = 6,667 W
- 02That is a 6.67 kW inverter
- 03DC oversize headroom = (1.2 - 1) x 100 = 20%
常见问题
Why not match inverter to panel size exactly?
Panels rarely reach rated output. A smaller inverter saves money and still captures nearly all the energy. Clipping losses at peak are typically under 1-2% annually.
What DC-to-AC ratio should I use?
A ratio of 1.15-1.25 is common for residential systems. Higher ratios (up to 1.5) are used in cloudy climates to maximize low-light capture.
What happens if the inverter is too small?
If DC power exceeds inverter capacity, the inverter clips output at its maximum rating. Some energy is lost, but the system is not damaged.