輸入參數
可編輯的範例值估算結果
即時計算結果回本期
5 年
淨值 · 節省
4,109,322.52 ¤
總計 · 投資報酬率
410.93 %
這些結果供初步規劃使用。選購設備前，請核對計算假設。
系統不會自動取得位置或電價，計算以您輸入的資料為準。
如何使用這個計算工具
填寫安裝費用和預估每月省下的電費，看看累積節省何時抵銷成本。也要計入維護及更換設備的費用。
英文技術說明
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.
計算方法
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.
使用結果之前
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.