Solar System Calculator for Boats

Calculate the perfect solar panel system size for your boat based on your energy needs and local sun conditions.

📊 Input Parameters

📈 Results

🔋 Required System Capacity

0 kW
Total DC power output needed from your solar array

☀️ Number of Panels Needed

0
Based on your selected panel wattage

📏 Estimated Panel Area

0 ft²
Approximate deck space required for installation

🔌 Daily Energy Production

0 kWh
Expected energy generation under your conditions

📅 Battery Storage Recommendation

0 kWh
Suggested battery capacity for 2 days autonomy

Need a Custom Solar Solution for Your Boat?

Our marine solar experts can design a perfect system tailored to your specific vessel and sailing patterns.

Call now for a free consultation and quote!

877-796-5799

Or fill out the form below to get started:

Frequently Asked Questions

How accurate is this calculator for marine applications? +

Our calculator is specifically tuned for marine environments, accounting for typical efficiency losses on boats (salt spray, partial shading, movement). However, for precise system design, we recommend consulting with a marine solar specialist who can assess your specific vessel and sailing patterns.

What’s different about solar panels for boats vs. home use? +

Marine solar panels are built to withstand harsh conditions: saltwater corrosion, constant vibration, and extreme weather. They typically use more durable frames, salt-resistant coatings, and flexible mounting options. Efficiency is often slightly lower than premium residential panels due to these rugged features.

How do I account for energy use while sailing vs. at anchor? +

This is a critical consideration. While sailing, you’ll typically use more energy for navigation equipment, autopilots, and instruments. At anchor, lighting and refrigeration dominate. We recommend calculating both scenarios separately and sizing your system for the higher demand situation, or considering a hybrid system with alternator charging for sailing periods.

Can I install solar panels myself on my boat? +

Many boat owners successfully install their own solar systems, especially for smaller setups. However, consider: 1) Marine electrical standards are strict for safety, 2) Proper sealing against water intrusion is critical, and 3) Structural integrity must be maintained. For systems over 200W or complex installations, professional help is recommended.

How does boat movement affect solar panel performance? +

Boat movement creates several challenges: 1) Constant angle changes reduce optimal sun exposure, 2) Shading from sails/masts varies frequently, and 3) Water reflection can both help and hinder performance. Our calculator accounts for these factors in the system losses parameter – we recommend using 25-30% for actively sailed boats versus 15-20% for primarily anchored vessels.