⚓ Solar System Calculator for Boats

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.

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.

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.

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.

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.