RV Electrical Load Calculator
Design your perfect RV electrical system with our professional-grade calculator. Get expert recommendations for batteries, solar panels, inverters, and complete power system specifications.
Battery Sizing
Precise capacity calculations
Solar Recommendations
Optimal panel configuration
Complete System Design
Professional specifications
🏠 Select Your RV Appliances
⚙️ Add Custom Appliance
Start Building Your System
Select your RV appliances from the categories above to get personalized power system recommendations.
🎓 RV Electrical System Basics
12V DC vs AC Power Systems
RVs use both 12V DC (battery power) and 120V AC (shore power/inverter). DC powers lights, water pump, and RV-specific appliances, while AC runs household appliances through an inverter or shore power connection.
Ah Battery Capacity Explained
Amp-hours (Ah) measure battery capacity. A 100Ah battery can theoretically provide 5 amps for 20 hours. However, only discharge deep-cycle batteries to 50% capacity for optimal lifespan.
☀️ Solar Panel Sizing
Size solar panels for your daily energy needs plus 30% buffer. Consider your travel destinations' sun hours - northern regions receive less peak sun than southern areas, especially in winter months.
⚡ Power Consumption Guide
💡 Energy Saving Tips
- • Use propane for cooking and heating when possible
- • Invest in 12V appliances to avoid inverter losses
- • Park in shade to reduce AC load by up to 40%
- • Use fans for air circulation before turning on AC
⚠️ Safety & Installation Guidelines
🔧 Professional Installation Required
⚡ Electrical work should be performed by certified RV technicians
📋 Ensure all installations meet RVIA and local electrical codes
🔍 Regular inspections prevent electrical fires and system failures
🛡️ Essential Safety Equipment
🔥 Install smoke and carbon monoxide detectors
⚡ Use surge protectors and GFI outlets in wet locations
🧯 Keep appropriate fire extinguisher types accessible
Disclaimer: This calculator provides estimates for planning purposes. Actual power requirements may vary based on usage patterns, environmental conditions, and equipment efficiency. Always consult with certified RV electrical professionals for system design and installation.
❓ Frequently Asked Questions
How accurate are these calculations?
Our calculations are based on industry-standard formulas and typical appliance specifications. Results provide reliable estimates for system planning, but actual consumption may vary by ±15% based on usage patterns and environmental factors.
Can I mix different battery types?
No, never mix battery types (AGM, Lithium, Gel) or capacities in the same bank. Different battery chemistries have varying charge/discharge characteristics that can damage batteries and reduce system performance.
How long do RV batteries last?
Deep-cycle lead-acid batteries typically last 3-5 years with proper maintenance. Lithium batteries can last 8-10 years or more. Battery lifespan depends on depth of discharge, charging practices, and environmental conditions.
What size inverter do I really need?
Size your inverter for the maximum simultaneous AC load plus 20% safety margin. A 2000W inverter handles most RV needs, but add up your largest appliances that might run together (microwave + coffee maker, etc.).
Is solar worth the investment?
Solar pays for itself in 2-4 years for frequent boondockers. Benefits include quiet operation, no fuel costs, and environmental friendliness. Consider your camping style and sun exposure when evaluating ROI.
Can I install these systems myself?
Basic 12V components may be DIY-friendly for experienced individuals, but 120V work and complex battery systems require professional installation for safety and warranty compliance. Check local codes and manufacturer requirements.