Using Specific Yield for Solar Benchmarking

𝐔𝐧𝐝𝐞𝐫𝐬𝐭𝐚𝐧𝐝𝐢𝐧𝐠 𝐁𝐚𝐧𝐤𝐚𝐛𝐢𝐥𝐢𝐭𝐲 𝐨𝐟 𝐒𝐨𝐥𝐚𝐫 𝐏𝐫𝐨𝐣𝐞𝐜𝐭𝐬: 𝐓𝐡𝐞 𝐑𝐨𝐥𝐞 𝐨𝐟 𝐏𝟓𝟎, 𝐏𝟕𝟓 & 𝐏𝟗𝟎 𝐢𝐧 𝐏𝐕𝐬𝐲𝐬𝐭 Every PVsyst report gives you three numbers: 𝐏𝟓𝟎, 𝐏𝟕𝟓, 𝐚𝐧𝐝 𝐏𝟗𝟎. But behind these numbers lies one critical driver — 𝐒𝐩𝐞𝐜𝐢𝐟𝐢𝐜 𝐘𝐢𝐞𝐥𝐝 (𝐤𝐖𝐡/𝐤𝐖𝐩). Let’s break it down using a 100 MW AC / 120 MW DC project: ⚡ P50 → 1702 kWh/kWp → 204 GWh (CUF ~23.3%) ⚡ P75 → 1625 kWh/kWp → 195 GWh (CUF ~22.3%) ⚡ P90 → 1555 kWh/kWp → 186 GWh (CUF ~21.3%) 👉 That’s nearly a 𝟗% 𝐝𝐫𝐨𝐩 𝐢𝐧 𝐬𝐩𝐞𝐜𝐢𝐟𝐢𝐜 𝐲𝐢𝐞𝐥𝐝 𝐚𝐧𝐝 𝐠𝐞𝐧𝐞𝐫𝐚𝐭𝐢𝐨𝐧 𝐟𝐫𝐨𝐦 𝐏𝟓𝟎 𝐭𝐨 𝐏𝟗𝟎. 📊 𝐒𝐨 𝐰𝐡𝐚𝐭’𝐬 𝐫𝐞𝐚𝐥𝐥𝐲 𝐡𝐚𝐩𝐩𝐞𝐧𝐢𝐧𝐠 𝐡𝐞𝐫𝐞? These are not just “different scenarios.” They represent 𝐜𝐨𝐧𝐟𝐢𝐝𝐞𝐧𝐜𝐞 𝐥𝐞𝐯𝐞𝐥𝐬 𝐨𝐟 𝐬𝐩𝐞𝐜𝐢𝐟𝐢𝐜 𝐲𝐢𝐞𝐥𝐝 𝐚𝐧𝐝 𝐠𝐞𝐧𝐞𝐫𝐚𝐭𝐢𝐨𝐧: • P50 → Most likely yield & output • P75 → Risk-adjusted yield • P90 → Highly certain, downside-protected yield As certainty increases… 👉 specific yield decreases 👉 which directly reduces total generation 👉 because uncertainty (weather, losses, degradation) is factored in 🏗️ 𝐖𝐡𝐲 𝐭𝐡𝐢𝐬 𝐦𝐚𝐭𝐭𝐞𝐫𝐬 𝐟𝐨𝐫 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫𝐬 • Your IRR, equity returns, and bid pricing are based on 𝐏𝟓𝟎 specific yield • Even a small change (like +13 kWh/kWp) → adds ~1.5 GWh/year → directly improves long-term project returns 👉 This is where design optimization, DC sizing, and EPC quality matter 🏦 𝐖𝐡𝐲 𝐭𝐡𝐢𝐬 𝐦𝐚𝐭𝐭𝐞𝐫𝐬 𝐟𝐨𝐫 𝐋𝐞𝐧𝐝𝐞𝐫𝐬 • Banks don’t fund your “expected generation” • They rely on P90 specific yield 👉 Why? Because it ensures: • Predictable generation • Stable cashflows • Strong DSCR ⚖️ 𝐖𝐡𝐚𝐭 𝐭𝐡𝐢𝐬 𝐫𝐞𝐩𝐨𝐫𝐭 𝐚𝐜𝐭𝐮𝐚𝐥𝐥𝐲 𝐜𝐡𝐚𝐧𝐠𝐞𝐬 This isn’t just a technical output. It directly impacts: • Debt sizing (based on P90 yield) • Risk perception (yield uncertainty gap) • Project valuation (P50 vs P90 spread) • Bankability of the project 𝐅𝐢𝐧𝐚𝐥 𝐓𝐚𝐤𝐞𝐚𝐰𝐚𝐲 A strong project is not the one with the highest P50 yield… It’s the one where the gap between P50 and P90 specific yield is minimized. 👉 Because that gap = uncertainty 👉 And uncertainty = financial risk Visit 👉 https://alendei.energy/ or connect with us for solar and Bess EPC, investment and IPP. #ReNewPower #AdaniGreen #TataPowerRenewables #Suzlon #InoxWind #JSWEnergy #NTPC #SECI #SterlingAndWilson #LarsenAndToubro #ACWAPower #Masdar #DEWA #EWEC #NEOM #AmeaPower #AlFanar #CEPCO #SaudiEnergy #UAEEnergy #LekelaPower #Globeleq #Azuri #AfreximBank #KenGen #Eskom #ZESCO #AfricaIPP #NextEraEnergy #Invenergy #PatternEnergy #AESCorporation #NRG #DukeEnergy #Exelon #DominionEnergy #Enbridge #BrookfieldRenewables #AlgonquinPower #HydroOne #EDPRenewables #BPAlternativeEnergy #ClearwayEnergy #ApexCleanEnergy #BlackAndVeatch #BurnsAndMcDonnell #RESAmericas #Vestas #VestasAmericas #GErenewables #SiemensGamesa #Nordex #NordexAcciona #TeslaEnergy #EatonEnergy #ABBPowerGrids #EnelGreenPower #Neoenergia #Energisa

Unlocking Solar Performance: The Power of Specific Yield with Real-World Insights In the rapidly evolving solar energy sector, understanding the metrics that define efficiency and performance is crucial. One such metric, Specific Yield, is a cornerstone for evaluating how effectively a solar installation converts sunlight into electricity. But what makes it so vital, and how can we leverage it to drive better outcomes? What is Specific Yield? Specific Yield, expressed in kWh/kWp, measures the energy produced per unit of installed DC capacity. It’s not just a number—it's a window into the operational health of your solar assets. Case Study: Comparing Inverters with Different DC Capacities Let’s dive into a real-world scenario: Two solar inverters, each rated at 100 kW, are connected to different DC capacities: Inverter A: Connected to 120 kW of panels and produces 480 kWh. Inverter B: Connected to 150 kW of panels and produces 660 kWh. Specific Yield Calculations: Inverter A: 480 kWh / 120 kW = 4 kWh/kWp Inverter B: 660 kWh / 150 kW = 4.4 kWh/kWp Despite having the same rated capacity, Inverter B outperforms Inverter A with a higher specific yield, indicating superior efficiency in converting solar energy into electricity. #RenewableEnergy #SolarEnergy #CleanEnergy #SustainableEnergy #SolarPower #GreenEnergy #SolarIndustry #SolarPlants #EnergyEfficiency #Sustainability #Analysis #PerformanceAnalysis

Specific Yield of a 1 MW Solar System with respect to time (25 years) Specific yield measures how much energy a solar system generates per unit of its installed capacity (kWp) annually. For a 1 MW (1000 kWp) solar system, specific yield typically ranges between 1,000–2,000 kWh/kWp/year, depending on the location and design. --- Key Points About Specific Yield 📊 Definition: Amount of electricity produced per kWp of installed capacity, expressed as kWh/kWp/year. 🌞 Typical Ranges by Region: Regional Variations: Sindh & Balochistan: Higher irradiance (~1,800–1,900 kWh/kWp/year). Punjab & KPK: Moderate irradiance (~1,600–1,800 kWh/kWp/year). Northern Areas: Lower irradiance (~1,500–1,600 kWh/kWp/year). The specific yield of a 1 MW solar system depends on several factors, including location, solar irradiance, system efficiency, and design. However, we can calculate it using the following formula: Formula: Specific Yield (kWh/kWp) = Total Energy Output (kWh)/Installed Capacity (kWp) For a 1 MW (1000 kWp) solar system, the specific yield is usually in the range of 1,000–2,000 kWh/kWp/year, 🛠️ Factors Influencing Specific Yield: Solar Irradiance: Higher sunlight leads to more energy output. System Design: Proper tilt, orientation, and panel efficiency matter. Temperature: Excessive heat can reduce panel performance. System Losses: Shading, soiling, or inverter inefficiencies can lower yield. 💡 Importance: Helps estimate energy output and financial returns. Useful for performance comparisons across regions or systems.

🌞⚡ Solar Performance Metrics Every EPC Engineer Should Know 📈 1️⃣ Specific Yield Specific Yield = Annual Energy (kWh) ÷ Installed Capacity (kWp) 📌 Used for: DPR preparation, financial modelling, site comparison 2️⃣ Performance Ratio (PR) PR = Actual Energy ÷ (POA Irradiation × Installed Capacity) 📌 Used for: Performance guarantee, O&M monitoring, system loss analysis 3️⃣ Maximum Possible Energy Emax = Installed Capacity × 8760 📌 Used for: CUF calculation and benchmarking (8760 = total hours in a year) 4️⃣ CUF (Capacity Utilization Factor) CUF = Annual Energy ÷ (Installed Capacity × 8760) 📌 Used for: PPA commitments, tender bidding, annual performance review 5️⃣ Temperature Corrected Power Pactual = PSTC × [1 + γ (Tcell − 25)] 📌 Used for: Hot climate performance estimation and simulation validation 6️⃣ Degradation Formula En = E1 × (1 − d)^(n−1) 📌 Used for: 25-year projections, IRR calculation, bankability studies 7️⃣ Ground Coverage Ratio (GCR) GCR = Module Area ÷ Land Area 📌 Used for: Layout optimization, row spacing, shadow analysis #SolarEnergy #SolarEngineering #UtilityScaleSolar #EPC #RenewableEnergy #SolarDesign #PVDesign #PerformanceRatio #CUF #CleanEnergy