💰 Güneş Verimi ve Geri Ödeme Hesaplayıcısı
Kurulu kapasite, güneşlenme saati, performans oranı, tarife ve sistem maliyetinden yıllık enerji verimini, seviyelendirilmiş enerji maliyetini (LCOE), basit geri ödemeyi ve ömür boyu net kârı tahmin edin.
💰 Energy & Finance
📊 Yield & Payback
Bir PV sisteminin ekonomisini değerlendiren sahipler ve geliştiriciler için.
Nasıl hesaplanır
· Yıllık enerji: E = kWp × tepe güneşlenme saati × 365 × PR.
· Ömür boyu üretim: E_total = E × Σ(1 − bozulma)^n.
· LCOE = sistem maliyeti ÷ E_total; geri ödeme = maliyet ÷ yıllık gelir.
Referans standartlar
| Standard | Scope |
|---|---|
| IEC 61724 | Fotovoltaik sistem performans izleme ve analizi |
Çözümlü örnek — 10 kWp → 11.680 kWh/yıl
1. 10 kWp, 4 tepe güneşlenme saati, PR 0.80.
2. Yıllık verim = 10 × 4 × 365 × 0.80 = 11.680 kWh.
3. $0.12/kWh tarifede yıllık gelir ≈ $1.402; LCOE ve geri ödeme sistem maliyetinizden gelir.
FAQ
How is solar payback period calculated?
Simple payback = system cost divided by annual savings. A 10 kW system costing $9,000 that saves $1,200/yr pays back in 7.5 years. Discounted payback also applies a discount rate. The calculator uses 25-year life, 0.5%/yr degradation and local tariff to compute simple payback, IRR, NPV and 25-year net profit.
What LCOE is typical for a residential solar system?
Residential rooftop solar LCOE typically runs $0.06-0.12/kWh depending on irradiation and cost; utility-scale solar reaches $0.03-0.05/kWh. In a 4-5 sun-hour region, a $1,000/kW residential system lands near $0.07-0.09/kWh. The calculator computes full-cost LCOE including O&M, WACC and inverter replacement.
How much does module degradation reduce output over 25 years?
Standard modules degrade about 0.5-0.7% per year, with a first-year drop of 1-2%, giving roughly 85-88% of rated power after 25 years. The calculator applies a 0.5%/yr linear degradation, so year-25 output is about 87.5% of year-1. This materially lowers lifetime LCOE estimates.
What is the difference between P50 and P90 in payback?
P50 payback uses the median year's generation (shorter payback); P90 uses the conservative 90%-exceedance year (longer payback). Lenders underwrite on P90. With 4-6% interannual variability, P90 payback is roughly 1-2 years longer than P50 for a 7-year project. The calculator reports both yield and economics at P50/P75/P90.
Does solar make sense without subsidies?
Yes in most regions. Where module-plus-install costs have fallen to $800-1200/kW and tariffs exceed $0.10/kWh, unsubsidized solar typically pays back in 6-10 years and delivers 10-15% IRR over 25 years. The calculator uses your tariff and system cost to show payback and IRR without assuming any subsidy.
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İlgili araçlar
Yalnızca ön tasarım için referans tahminler (FOB Qingdao, EXW) — nihai teklif değildir. Boyutlandırmayı projenize ve yerel standartlara göre doğrulayın.
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