Jack
I learned a lot and feel confident in…
I learned a lot and feel confident in tackling projects on my boat
Response from BoatHowToSep 21, 2026
Thanks Jack!

Boat Electrics & MechanicsCourses and Advice:How to do it the RIGHT wayBoatHowTo is the most dependable source of technical knowledge for sailors and boaters around the world. Our online courses and guides help you enjoy troublefree boating, and solve both common and not so common technical problems on your boat.We help you to 1) save money (you don't have to hire someone every time something goes wrong)2) avoid hassle and frustration (with our help you will experience fewer breakdowns and longer life for the components on your boat)3) achieve a more enjoyable life afloat (with superior energy systems that increase your comfort)4) reduce your carbon footprint (with improved efficiency and less waste)
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Jack
I learned a lot and feel confident in tackling projects on my boat
Response from BoatHowToSep 21, 2026
Thanks Jack!
Paul D.
Informative
Response from BoatHowToJul 29, 2026
Thanks Paul!
James W.
Most of what you have covered so far, I already knew. The few things I did not know however have made the course worthwhile. a) I didn't fully appreciate the details in the ABYC/ISO wire size tables. b) I didn't realize that "doubling" a cable run was acceptable so long as either cable can carry the load (this may not have come from the course) c) I've been an Extra Class ham for ~40years and I've only worried about Ampacity and never paid much attention to voltage drop (though, as a shade-tree auto mechanic, voltage drop is something I often "check" though I never design for). I'm currently re-wiring (installing solar) in my 18yo 34ft RV.. which lead me to watch your videos and subsequently take this course. d) I never much though about the stainless-steel resistance issue. I'm quite confident I'm guilty of this error too. Thanks e) I wish the United States would adopt the ISO rules (and wire sizes) but at 70yo myself, I won't hold my breath. I remember when we "tried" this for weights&measures back in the 80s or when ever. f) I did enjoy learning why the US uses "gauge size" and higher numbers == smaller wires. Not unlike shotgun gauges. g) Jan is enjoyable. (Same for Nigel)
Response from BoatHowToMay 28, 2026
Thanks a lot, James! We are glad that you learned something new despite having a lot of previous experience!
William C.
Expert advice Ive been following Nigel Calder for decades, since he wrote the 12v bible. Jan is excellent at delivering the talks but you have to keep up, he goes quickly.
Response from BoatHowToAug 17, 2025
Thanks William! Regarding the speed of the videos: You can slow down the playback by clicking on the little settings icon (the cog) and then choose for example 0.75x playback speed. I hope this helps. Best, Jan