Boat Solar Panel Sizing Calculator

Total Watt-hours needed per day (e.g., from battery monitor logs).
Average daily peak sunlight hours for your location.
Accounts for real-world losses (e.g., wiring, controller loss). 77% is a common estimate.
Wattage of the specific panel model you plan to install.
Recommended Solution

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Recommended System Wattage (Wp)

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Number of Panels Needed (at 150W)


System Power Comparison