Introduction
This document provides an analysis of shore power requirements based on a survey conducted by HyPower in 2006, covering 410 boats from 78 U.S. manufacturers. It aims to assist designers in determining the shore power needs for different types of boats.

Population Surveyed
The survey included various types of boats: Powerboats, Yachts, Houseboats, and Sailboats. All powerboats and yachts surveyed were U.S. made, while 30% of sailboats were imported.

Powerboats (25' to 70')
Shore power requirements for powerboats vary by length:

• 25 to 30 feet: 86% require 30A 125V, 14% require 30A/30A 125V.
• 30 to 35 feet: 73% require 30A 125V, 27% require 30A/30A 125V.
• 35 to 40 feet: 18% require 30A 125V, 65% require 30A/30A 125V, 17% require 50A 125/240V.
• 40 to 45 feet: 2% require 30A 125V, 35% require 30A/30A 125V, 57% require 50A 125/240V, 6% require 50A/50A 125/240V.
• 45 to 50 feet: 12% require 30A 125V, 33% require 30A/30A 125V, 55% require 50A 125/240V.
• 50 to 55 feet: 4% require 30A 125V, 56% require 30A/30A 125V, 40% require 50A 125/240V.
• 55 to 60 feet: 40% require 30A/30A 125V, 60% require 50A 125/240V.
• 60 to 65 feet: 10% require 30A/30A 125V, 90% require 50A 125/240V.
• 65 to 70 feet: 8% require 30A/30A 125V, 92% require 50A 125/240V.

Large Cruisers (70' to 100')
Shore power requirements for large cruisers are as follows:

• 70 to 80 feet: 78% require 50A/50A 125/240V, 11% require 100Amp single phase, 11% require 100Amp three phase.
• 80 to 90 feet: 33% require 50A/50A 125/240V, 33% require 100Amp single phase, 34% require 100Amp three phase.
• 90 to 100 feet: 25% require 50A/50A 125/240V, 75% require 100Amp three phase.

Houseboats
Shore power requirements for houseboats are:

• 40 to 50 feet: 12% require 30A 125V, 12% require 30/30 125V, 76% require 50A 125/250V.
• 50 to 60 feet: 5% require 30A 125V, 95% require 50A 125/250V.
• 60 to 70 feet: 9% require 30A 125V, 91% require 50A 125/250V.
• 70 to 80 feet and above: 100% require 50A 125/250V.

Sailboats
Shore power requirements for sailboats are:

• 25 to 30 feet: 100% require 30A 125V.
• 30 to 35 feet: 100% require 30A 125V.
• 35 to 40 feet: 94% require 30A 125V, 6% require 30/30 125V.
• 40 to 45 feet: 78% require 30A 125V, 15% require 30/30 125V, 7% require 50A 125/250V.
• 45 to 50 feet: 54% require 30A 125V, 15% require 30/30 125V, 31% require 50A 125/250V.
• 50 to 55 feet: 40% require 30A 125V, 60% require 50A 125/250V.

Conclusion
This survey provides a comprehensive overview of the shore power requirements for various types of boats, which can assist designers and manufacturers in planning and designing appropriate power systems for different boat models.