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☀️ 太阳能板数量计算器Solar Panel Calculator
根据每月或每日用电量、当地峰值日照时数、单块组件功率和系统损耗，估算所需的光伏系统容量（kW）、组件数量和年发电量。日照时数和损耗都是示例值，请按当地数据修改。Estimate the solar array size (kW), number of panels and yearly output from your monthly or daily electricity use, local peak sun hours, panel wattage and system losses. Sun hours and losses are example values; change them for your location.
使用说明与常见问题How-to & FAQ
「太阳能板数量计算器」是什么？What is the Solar Panel Calculator tool?
根据每月或每日用电量、当地峰值日照时数、单块组件功率和系统损耗，估算所需的光伏系统容量（kW）、组件数量和年发电量。日照时数和损耗都是示例值，请按当地数据修改。Estimate the solar array size (kW), number of panels and yearly output from your monthly or daily electricity use, local peak sun hours, panel wattage and system losses. Sun hours and losses are example values; change them for your location.
如何使用「太阳能板数量计算器」？How do I use the Solar Panel Calculator tool?
在「太阳能板数量计算器」中，填写「用电量」、「用电量单位」、「峰值日照时数（小时/天，示例 4.5）」、「单块组件功率 W」、「系统损耗 %（PVWatts 默认 14）」等参数，结果会随输入实时计算并显示在下方。In the Solar Panel Calculator: Fill in "Electricity use", "Use per", "Peak sun hours (h/day, example 4.5)", "Panel wattage W", "System losses % (PVWatts default 14)"; results are recalculated instantly as you type.
怎么算的？How is it calculated?
系统容量 kW = 每日用电 kWh × 覆盖比例 ÷（峰值日照时数 × (1 − 损耗)）；组件数 = 容量 ÷ 单块功率，向上取整。System kW = daily kWh × coverage ÷ (peak sun hours × (1 − losses)); panels = system size ÷ panel wattage, rounded up.
14% 损耗和 4.5 小时从哪来？Where do 14% and 4.5 hours come from?
14% 是美国国家可再生能源实验室（NREL）PVWatts 计算器的默认系统损耗（逆变器之外的线损、灰尘、遮挡等）。4.5 小时只是示例，实际峰值日照从高纬度地区的 2–3 小时到沙漠地区的 6 小时以上不等。14% is the default system loss in NREL's PVWatts calculator (wiring, soiling, shading and similar, excluding the inverter). 4.5 hours is only an example: real peak sun hours range from 2–3 at high latitudes to over 6 in deserts.
峰值日照时数是什么意思？What are peak sun hours?
把一天的太阳辐射量折算成 1000 W/m² 标准辐照下的小时数。比如一天共 4.5 kWh/m²，就相当于 4.5 个峰值日照小时。The day's solar energy expressed as hours at the standard 1000 W/m² irradiance; 4.5 kWh/m² in a day equals 4.5 peak sun hours.
计算结果可以用于作业或工程吗？Can I use the results for homework or engineering?
「太阳能板数量计算器」使用教科书标准公式（公式写在说明和常见问题中），适合学习和估算核对；涉及安全的工程设计请以规范和实测为准。The Solar Panel Calculator uses standard textbook formulas (given in the description and FAQ), which is good for learning and checking estimates; for safety-critical engineering follow codes and measured values.
「太阳能板数量计算器」免费吗？需要注册吗？Is the Solar Panel Calculator free? Do I need an account?
「太阳能板数量计算器」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Solar Panel Calculator is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.