kWh Québec — Solar Technical Specifications
Standard Equipment
- •Solar panels: Jinko 625W bifacial N-type TOPCon (JKM-625N-66HL4M-BDV)
- •Inverter: Kaco Blueplanet 375 TL3
- •Racking: KB Racking (for BOM generation)
System Parameters
- •Roof space: ~3.5 m²/kW for 625W panels
- •Degradation rate: 0.4%/year (90% capacity after 25 years)
- •DC:AC ratio (ILR): 1.45 (PVSyst range 1.44–1.47)
- •Hydro-Québec consumption data: 15-minute interval data (not hourly)
- •Baseline brut yield: 1,150 kWh/kWp (before system losses)
PVSyst-Validated System Loss Budget (Source: Rematek PVSyst Reports Feb 2026)
| Parameter | Value | Direction | Code field |
|---|---|---|---|
| DC wiring losses | 3.0% | Loss | wireLossPercent: 0.03 |
| Light Induced Degradation (LID) | 1.0% | Loss | lidLossPercent: 0.01 |
| Module mismatch at MPP | 2.0% | Loss | mismatchLossPercent: 0.02 |
| String mismatch | 0.15% | Loss | mismatchStringsLossPercent: 0.0015 |
| Module quality gain | 0.75% | Gain | moduleQualityGainPercent: 0.0075 |
| Net system derate | ~5.4% | Loss | Compound of above |
Effective Yield Calculation
- •Brut baseline: 1,150 kWh/kWp
- •Net derate factor: (1 - 0.03) × (1 - 0.01) × (1 - 0.02) × (1 - 0.0015) × (1 + 0.0075) ≈ 0.9463
- •Effective net yield: 1,150 × 0.9463 ≈ 1,088 kWh/kWp (before temperature correction)
- •With temperature correction: ~1,030 kWh/kWp (matches PVSyst output)
Bifacial Parameters (PVSyst-calibrated)
- •Bifaciality factor: 0.80 (80% rear-side efficiency)
- •Roof albedo: 0.60 (conservative; PVSyst range 0.42–0.60)
- •Temperature coefficient: -0.4%/°C
Where These Values Live in Code
- •Defaults:
shared/schema.ts→defaultAnalysisAssumptions - •Interface:
server/analysis/potentialAnalysis.ts→SystemModelingParams - •Simulation:
server/routes/siteAnalysisHelpers.ts→runHourlySimulation() - •Duplicate simulation:
server/routes.ts→runHourlySimulation()(legacy) - •Display:
shared/brandContent.ts→BRAND_CONTENT.assumptions
Important Notes
- •Never reference old specs (400-500W panels, 5-6 m²/kW, 0.5%/yr degradation, 80% after 25 years)
- •Never use old defaults (ILR 1.2, wireLoss 0%, no LID/mismatch losses)
- •Tariff source data in the analysis engine is from Hydro-Québec April 2025 grille tarifaire — this is correct internal labeling
- •Public-facing content should reference the current year (2026) for investment context, not the tariff source year
- •System losses are applied in DC production calculation AFTER temperature correction and BEFORE inverter clipping
- •Module quality gain is a negative loss (increases output) — applied as
(1 + moduleQualityGainPercent)