Boat Electrics & Mechanics

Courses and Advice:

How to do it the RIGHT way

  • You're a boater or a sailor?
  • You want to understand what's going on inside your engine?
  • You want to fix and maintain your boat electrics like an expert?

We teach you how to be self reliant on the water and save money by fixing things yourself.

Check out our online courses on electrical systems:

Or sign up below to get updates & bonus content for free...

As Featured In

Your Expert Teachers

Nigel & Jan

Dr. Jan C. Athenstädt

Nigel Calder

We are passionate about technical systems on boats since the 1970s (at least one of us) and we have a mission

We offer the internet's most profound knowledge on
boat mechanics and electrics.

Click here to learn more about our goals and values and here to get to know us.

By now, over 1,200 students have taken our first two courses on marine electrical systems: Boat Electrics 101, covering marine DC systems and Advanced Marine Electrics, covering a large variety of advanced topics.

We received more positive feedback than we could ever have imagined! This motivates us even more to keep working on great courses, articles and videos. Our next project will be a course on Marine Diesel Engines.

Want to stay tuned? Sign up and we'll keep you posted...

Friends & Partners

We work together with various partner organizations fostering high quality marine education and other services

Click here for a full list with more info on our friends & partners

What students say about us

I now understand all the electrical systems and how everything works together.


Bob Russell S/V Spartina

I want to let you know how impressed I was with the BoatHowTo course!!
From the very basics, through creating a detailed circuit diagrams of the electrical systems on my boat, my knowledge is years ahead of where I thought it would be at this point.
Thanks for a wonderful, extremely useful (and fun) course that takes a lot of the mystery out of sailboat electrical systems!!

Learning with you in 2022 has been a highlight of the year for me


Jonathan Mastin

I'm so thankful for you guys and all the hard work you put into sharing your knowledge with us. Learning with you in 2022 has been a highlight of the year for me.

An evolving learning platform


Miro Peternelj

Having access to up-to-date materials on Boat Electrics is very handy for someone who deals with small boat design, like me. The best part of the whole course is that it actually isn't only a course, but it is an evolving learning platform.

Click here for more testimonials.

Check Out Our Latest Articles & Videos

Save the date! Nigel and Jan will teach two two-part online classes with the American Sailing Association (ASA). The first class on March 12 and 14 will be on TROUBLE FREE & OPTIMIZED ELECTRICAL SYSTEMS. The second class on DIESEL ENGINE FUNDAMENTALS will take place on April 9th and 23rd. If you can’t participate live,

Online Classes with American Sailing Association

If you want to complement your Marine Electrical online education with hands-on training, you can do so in 2024! Nigel is organizing two in-person training events in Maine in 2024. Seminar Dates:April 17th & 18thOctober 29th & 30thin Portland, ME For Details & Registration, Click Here. See the press release below: A Deep Dive into

2024 In-Person Seminars with Nigel Calder

Watch BoatHowTo expert Nigel Calder figure out why Arabella’s zincs are eaten up so quickly. If you want to learn more this topic, check out our module on galvanic and stray current corrosion, which is part of our Advanced Marine Electrics program.

Acorn to Arabella – Figuring out Corrosion Issues

Click here for more articles & videos and here to learn more about our courses.

>