Let’s assume your household consumes about 10 kWh per day and your region’s solar irradiance is around 5 kWh/m²/day: Using the calculator approach: Required panel output (kW) ≈ Daily consumption / (Irradiance × hours of sun). But since the calculator also factors in typical system losses (assume ~20%), the actual panel rating increases accordingly.
A 10 kWh/day load in a region with 4.5 average sun hours/day needs a 2.5–3 kW system after accounting for losses and efficiency margins. Real-World Case: Hybrid System for a Family of Five
The average solar radiation at the house location is 1,000 kWh per kWh. To make the system economically worthwhile, you should use as much solar energy as possible yourself. Due to the reduced feed-in tariff, it is no longer worthwhile to supply the public grid.
To make the system economically worthwhile, you should use as much solar energy as possible yourself. Due to the reduced feed-in tariff, it is no longer worthwhile to supply the public grid. For a 4 kWp photovoltaic system, you need 12-13 photovoltaic modules with a peak output of almost 320 watts. The invoice for this:
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