Boat Electrics

High Power Demand Systems

2 Modules 11 Lessons Intermediate

About this course

Learn how to plan and install systems with high power demand. Topics include generators, high-output alternators, and lithium batteries.

Course Structure

10 Lessons

Alternator Installations

In this module we review some longstanding alternator issues that need to be addressed in any installation, together with some new ones that are becoming important and which may be overlooked.

Desired vs. Real World Output

In this lesson, you will learn about the reasons, why the output of an alternator might be significantly lower in real life than its rated output.

Alternator Installation

In this lesson, we look at different mounting options for alternators and belts.

Engine Overload

In this lesson we explore how to estimate if a high-output alternator might overload the engine.

Crankshaft Pulley Side Loads

Learn about ways to reduce the side loads on the pulleys.

Cable Sizing, Stranding and Connections

We take a brief look at the wiring requirements for alternators.

Thermal Issues

In this lesson, we take a look at thermal issues and how to avoid overheating of the equipment.

Overcurrent Protection

We take a quick look at the requirements for OCP for alternators according to the ISO and ABYC standards.

Alternators and Lithium-ion Batteries

In this lesson, you will learn about the special requirements for the alternator when installing lithium-ion batteries.

Post Installation Heat Testing

Tips for testing the installation in order to find sources of excessive heat generation.


A quick recap about what we have learned in this module.