1. What is a Solar Generator Size Calculator?

Definition: This calculator estimates the size (in watts) of solar generator needed based on your energy requirements, available sunlight hours, and system performance ratio.

Purpose: It helps homeowners, campers, and solar enthusiasts determine the appropriate solar generator size for their energy needs.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P \) — Required generator size (watts)
• \( Load \) — Daily energy requirement (watt-hours)
• \( H \) — Peak sunlight hours per day
• \( PR \) — Performance ratio (system efficiency)

Explanation: The energy requirement is divided by the product of sunlight hours and performance ratio to determine the generator wattage needed.

3. Importance of Proper Sizing

Details: Correct generator sizing ensures reliable power supply, maximizes system efficiency, and prevents over- or under-investment in solar equipment.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: How do I determine my daily energy requirement?
A: Add up the watt-hours of all devices you plan to power (Wattage × Hours used per day for each device).

Q2: What's a typical performance ratio?
A: Most systems have a PR between 0.7-0.8, accounting for losses from temperature, wiring, inverters, etc.

Q3: Where can I find sunlight hours for my location?
A: Check solar insolation maps or use tools like NASA's solar database for your specific location.

Q4: Should I add a safety margin?
A: Yes, consider adding 10-20% to the calculated size to account for cloudy days and future expansion.

Q5: Does this include battery storage?
A: No, this calculates generator size only. Battery capacity should be calculated separately based on your autonomy needs.