태양광 패널 어레이 사이징
특정 일일 에너지 요구량을 충족하는 데 필요한 광전지 패널의 총 개수를 확인하세요.
소비 데이터
패널 어레이 사이징
이 계산에는 인버터 변환, 배선 저항 및 온도 변화를 고려한 표준 1.25 손실 계수(25%)가 포함됩니다.
사이징 공식
패널 수는 에너지 수요, 이용 가능한 일조량, 개별 패널의 와트수에 따라 달라집니다.
필요 어레이 전력
kW = (Daily kWh ÷ Sun Hours) × 1.25 1.25 손실 계수는 실제 출력을 감소시키는 열 감소, 배선 저항 및 인버터 변환 손실을 포함합니다.
패널 수
Panels = ⌈(kW × 1000) ÷ Panel Watts⌉ 항상 다음 정수로 올림하세요 — 패널의 일부는 전력을 생산하지 못합니다.
How to Size a Solar Panel Array
Sizing a solar panel array correctly ensures your system produces enough electricity every day without overspending on excess capacity. The three core variables are daily energy consumption (kWh), peak sun hours at your location, and the wattage rating of each panel.
What Are Peak Sun Hours?
A peak sun hour equals one hour of sunlight at 1,000 W/m² intensity. Most US locations average 4–6 peak sun hours daily. Northern and coastal areas typically see 3.5–4 hours, while the desert Southwest can exceed 6. Always use local solar irradiance data for the most accurate sizing.
Step-by-Step Sizing Guide
- Measure Your Daily Usage: Check your electricity bill for monthly kWh and divide by 30. Add 15–20% buffer if you plan to add appliances later.
- Find Your Peak Sun Hours: Look up your location's solar resource data. The default of 4.5 hours is a safe conservative estimate for most temperate regions.
- Choose a Panel Wattage: Modern residential panels range from 300W to 450W. Higher-wattage panels reduce the number of panels needed for the same output.
- Apply the Loss Factor: Multiply your raw requirement by 1.25. Real-world systems consistently produce less than their rated capacity due to heat, shading, and conversion losses.
- Round Up the Count: Always round the panel count up to the next whole number to guarantee you meet your energy target.
Common Sizing Mistakes to Avoid
- Ignoring seasonal variation: Size for your worst month (typically December for northern climates), not the annual average.
- Skipping the loss factor: A 1:1 system will under-produce on hot days, cloudy periods, and as panels age.
- Using nameplate wattage alone: Panel output degrades 0.5–0.8% per year. Build in headroom for long-term performance.