1. What is RV Solar Power Calculator?

Definition: This calculator estimates the solar power system size needed for an RV based on daily energy consumption, available sunlight, and system efficiency.

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

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{kW} \) — Required solar power (kilowatts)
• \( E_{kWh} \) — Daily energy consumption (kilowatt-hours)
• \( t_{sun} \) — Peak sun hours per day (hours)
• \( \eta_{solar} \) — System efficiency factor (0-1)

Explanation: The formula converts daily energy needs into the required solar panel capacity by accounting for available sunlight and system losses.

3. Importance of Solar Power Calculation

Details: Proper sizing ensures reliable power supply, prevents battery damage from undercharging, and optimizes system cost.

4. Using the Calculator

Tips: Enter your daily energy needs in kWh, average peak sun hours (default 4), and system efficiency (default 0.75). All values must be > 0, with efficiency between 0-1.

5. Frequently Asked Questions (FAQ)

Q1: What are peak sun hours?
A: The equivalent hours of full sunlight your location receives daily, accounting for weather and seasonal variations.

Q2: What affects system efficiency?
A: Factors like panel angle, temperature, wiring losses, charge controller efficiency, and battery losses (typically 70-85% total).

Q3: How do I find my daily energy needs?
A: Add up the watt-hours of all appliances you'll use, or monitor with an energy meter.

Q4: Should I add a safety margin?
A: Yes, consider adding 20-30% to account for cloudy days and future expansion.

Q5: How does this relate to battery bank size?
A: Your battery bank should store 2-3 days of energy for autonomy during poor weather.