Boat Power Usage Audit
Understanding your vessel's electrical load is the first step in designing a reliable power system. This calculator helps estimate your daily energy usage based on the equipment you run onboard-giving you a starting point for battery sizing, charging requirements, and overall system design.
What Is a Power Audit?
A power audit is a detailed breakdown of how much energy your boat uses over a 24-hour period.
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We look at:
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Every electrical device onboard
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How long each item runs per day
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Peak loads vs continuous loads
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Charging sources (alternator, solar, shore, generator)
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From this, we calculate your daily energy consumption (Ah or Wh) and design a system that supports it reliably.​
Why It Matters
Without a power audit, systems are often:
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Undersized → batteries drain too quickly
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Oversized → unnecessary cost and weight
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Poorly balanced → charging sources can’t keep up
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A proper audit ensures:
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Reliable power at anchor
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Longer battery life
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Optimized charging performance
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A system tailored to your actual boating style
Power Usage Audit
The link below will take you to a Google sheets page where you can create your own power usage audit for your own boat. This will be a copy so feel free to edit or add equipment as you see fit.
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If you are completing this as part of a Sea & Land Yacht Works System Consultation, please email a PDF to info@seaandlandyw.com.