1. What is a Load Calculator for Solar System?

Definition: This calculator estimates the power required for a solar system based on energy needs, sunlight hours, and system performance.

Purpose: It helps solar installers and homeowners determine the appropriate solar panel capacity needed for their energy requirements.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P \) — Required power (watts)
• \( Load \) — Energy required (watt-hours)
• \( H \) — Sunlight hours (hours)
• \( PR \) — Performance ratio (decimal, typically 0.75)

Explanation: The energy requirement is divided by the product of sunlight hours and performance ratio to determine the necessary solar panel capacity.

3. Importance of Solar Load Calculation

Details: Accurate load calculation ensures proper system sizing, optimal energy production, and cost-effective solar installations.

4. Using the Calculator

Tips: Enter your daily energy requirement in watt-hours, average sunlight hours (default 5), and performance ratio (default 0.75). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is the performance ratio?
A: The performance ratio accounts for system losses (0.75 means 75% efficiency after accounting for temperature, wiring, and inverter losses).

Q2: How do I determine my energy load?
A: Sum the watt-hours of all devices you want to power (wattage × hours used per day).

Q3: What's a typical sunlight hours value?
A: This varies by location (3-6 hours in most areas). Check solar insolation maps for your region.

Q4: Should I include battery storage in this calculation?
A: This calculates panel requirements. For battery sizing, you'll need additional calculations based on days of autonomy.

Q5: Does this account for seasonal variations?
A: No, use the worst-case sunlight hours for your location to ensure year-round performance.