1. What is kWp to kWh Conversion?

Definition: This calculator estimates the energy production (kWh) of a photovoltaic system based on its peak power (kWp) and sun hours.

Purpose: It helps solar energy professionals and homeowners predict electricity generation from solar panels.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( E_{kWh} \) — Energy produced (kilowatt-hours)
• \( P_{Wp} \) — System peak power (watts-peak)
• \( t_{sun} \) — Equivalent sun hours (hours)

Explanation: The system's peak power is multiplied by sun hours to get watt-hours, then divided by 1000 to convert to kilowatt-hours.

3. Importance of Energy Calculation

Details: Accurate energy production estimates help in system sizing, ROI calculations, and energy production forecasting.

4. Using the Calculator

Tips: Enter the system's peak power in watts and the equivalent sun hours for your location. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What are equivalent sun hours?
A: The number of hours at peak sunlight intensity that would produce the same total energy as actual varying sunlight conditions.

Q2: How do I find my location's sun hours?
A: Use solar insolation maps or databases like NASA's or NREL's for your specific location.

Q3: Should I use kW or W for system power?
A: The calculator accepts watts (W), but you can enter kilowatts (kW) by multiplying by 1000 (1kW = 1000W).

Q4: Does this account for system losses?
A: No, for real-world estimates multiply the result by 0.75-0.85 to account for typical system losses.

Q5: What's the difference between kWp and kWh?
A: kWp is peak power capacity, while kWh is actual energy produced over time (power × time).