输入参数
可编辑的示例值估算结果
实时计算结果回本期
5 年
净值 · 节省
4,109,322.52 ¤
总计 · 投资回报率
410.93 %
这些结果用于初步规划。选购设备前，请核对计算假设。
系统不会自动获取位置或电价，计算以您输入的数据为准。
如何使用这个计算器
填写安装费用和预计每月节省的电费，看看累计节省何时覆盖成本。维护和更换设备的费用也要计入。
英文技术说明
Common questions
What does a solar return calculator measure?
It compares the initial investment with projected net savings across the selected period. Read ROI together with the payback year and annual cash flow: maintenance and equipment replacement can change when the investment is recovered. This model uses your assumptions and does not guarantee a financial return.
计算方法
Year-one savings = monthly savings × 12. Subsequent savings grow by (1 + growth) × (1 − degradation) each year. Deduct annual maintenance and any replacement in its specified year. Payback is the first year-end after which cumulative cash flow remains nonnegative through the selected horizon. ROI = net profit ÷ upfront cost.
使用结果之前
Undiscounted cash-flow estimate; no financing, taxes or residual value. Savings growth is an assumption, not a forecast. Monthly savings should already account for self-consumption, exports and bills that remain payable. Replacement costs are treated as year-end costs.
Is payback guaranteed?
No. It changes with production, tariffs, self-consumption, equipment costs and maintenance.