1. What is an RV Solar Calculator Watts?

Definition: This calculator estimates the solar panel wattage needed for an RV based on energy requirements, available sunlight hours, and system efficiency.

Purpose: It helps RV owners and solar installers determine the appropriate solar panel size for off-grid power needs.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_w \) — Solar power needed (watts)
• \( E_{kWh} \) — Daily energy consumption (kilowatt-hours)
• \( t_{sun} \) — Peak sun hours available (hours)
• \( \eta_{solar} \) — System efficiency factor (0-1)

Explanation: The energy requirement is converted to watt-hours, then divided by available sunlight hours and system efficiency to account for energy losses.

3. Importance of Solar Power Calculation

Details: Proper solar sizing ensures reliable power supply, prevents battery drain, and optimizes system cost and space requirements.

4. Using the Calculator

Tips: Enter your daily energy needs in kWh, average peak sun hours (default 5), and system efficiency (default 0.75). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: How do I find my energy needs?
A: Calculate your daily kWh usage by adding up all appliance wattages multiplied by hours used per day, then divide by 1000.

Q2: What are typical sun hours?
A: Most locations get 4-6 peak sun hours daily. Check solar maps for your specific area.

Q3: Why is efficiency less than 1?
A: Efficiency accounts for losses in panels, wiring, charge controllers, and batteries (typically 70-85% total).

Q4: Should I round up the result?
A: Yes, it's recommended to round up to the nearest standard panel size and consider adding 20-30% for cloudy days.

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