Solar Calculator for Boats

About Solar Calculator for Boats

Solar Calculator for Boats — size your onboard solar system in seconds.

Designed for sailors, motorboat owners and liveaboards who wish to figure out the right solar panel + battery + inverter setup without becoming an electrician.

WHAT IT CALCULATES
• Daily solar yield based on your location, panel wattage and controller type (PWM or MPPT)
• Battery bank sizing, with depth-of-discharge respected for lead-acid and lithium
• Inverter sizing, including efficiency losses and realistic shore-power vs engine-alternator loads
• Optional shore-power and grid-mode scenarios for boats that also connect to marina power

DESIGNED FOR REAL BOATS
• Pre-loaded with solar zones — Mediterranean, Atlantic Spain, UK/Ireland, Canary Islands — so your estimates match your actual cruising area
• Supports mixed panel groups: different wattages and controller types in the same system
• Built around realistic values for common boat electrical setups

EDUCATIONAL, NOT JUST A CALCULATOR
• Built-in tooltips explain what MPPT, depth of discharge and inverter efficiency actually mean — so you understand the result, not just the number
• Designed for boat owners who want to make informed decisions, not for electrical engineers

PRIVACY-FIRST
• All calculations run locally on your device. No account, no login, no server processing of your inputs.
• The only data that leaves your device is the advertising ID, used by Google AdMob to serve non-personalised ads. You can opt out any time in your device settings.

LANGUAGES
• Full interface in English and Spanish. Switch with one tap.

Free, with a small banner ad at the bottom of the screen for maintain the app.

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