1. What is a Solar Calculator for RV?

Definition: This calculator estimates the required solar panel system size (in kW) for an RV based on daily energy needs, peak sun hours, and system efficiency.

Purpose: It helps RV owners determine the appropriate solar power system size to meet their energy requirements while traveling or camping off-grid.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{kW} \) — Solar system size (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 System Sizing

Details: Proper sizing ensures your RV has enough power for appliances while avoiding unnecessary costs from an oversized system.

4. Using the Calculator

Tips: Enter your daily energy needs in kWh, estimated 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 daily energy needs?
A: Add up the wattage of all appliances multiplied by their daily usage hours, then divide by 1000 to get kWh.

Q2: What are typical peak sun hours?
A: Most locations get 4-6 peak sun hours daily. Southern areas may get more, northern areas less.

Q3: Why is system efficiency less than 1?
A: Efficiency accounts for losses in wiring, charge controllers, batteries, and panel orientation.

Q4: Should I round up the calculated size?
A: Yes, it's recommended to round up to the nearest standard panel size and add 10-20% buffer.

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