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Best Fuses & Fuse Holders for a DIY Camper Electrical Install

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Best Fuses & Fuse Holders for a DIY Camper Electrical Install

Fuses are a vital piece of safety equipment in any electrical system. Fuses protect the wire from an overcurrent event such as an electrical short or from trying to push too much power through too small of a wire. This blog post will teach you what type of fuse you need for your DIY camper electrical install.

Cheap vs Expensive Fuses

In the past, I’ve recommended very inexpensive fuses. They worked for a while and many people had good luck with them. Recently (since February 2020), both myself and the tech support team at Battle Born Batteries who I work closely with have seen an increasing number of quality control issues on these non-name-brand fuses that are so common on Amazon. These problems revolve largely around the fuse getting too hot under normal use. This would cause the fuse holder to melt, loosen, and cause the system to stop working.

So… if you wish to save some money and test your luck with these inexpensive fuses and fuse holders; that is your prerogative; but I can no longer recommend “no-name” fuses and fuse holders on So, the following list will include only fuses and holders from Blue Sea, Littelfuse, Bussman, Eaton, Spartan Power or similar that have, at least some kind of testing agency certification or code compliancy recognition (UL, ABYC, ROhS, etc).

How Big of a Fuse do I Need for [My Device]

This blog post is more about the various TYPES of fuses and not necessarily how to choose the sizes. If you want a more in-depth blog post & video that will teach you how to size a fuse, you can click here for the specific blog post on that topic:

Best Fuses & Fuse Holders for a DIY Camper Electrical Install

This list will show you the various types of fuses you will encounter during your DIY camper electrical install and teach you which ones are right for what purposes.

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Monday 18th of January 2021

i ned 2 gat the busbar

Jessica Leaker

Saturday 19th of December 2020

Hi Nate I love your YouTube videos it has already helped me a great deal! could you please tell me if I really need a combiner box for my backyard array (I know it's not a camper but it should be the same right?) with 4 195w panels in series parallel or can I get away with fuses at the mc4 connector as well as the other needed places? thank you and please keep the videos coming

Nate Yarbrough

Tuesday 22nd of December 2020

The main determining factor on that will be wire size. If you can use 10 AWG for all of the wire, MC4 combiners should be fine (verifying with your local building codes). If you need bigger wire to overcome voltage drop, you may need to use a combiner.

Use my wire size calculator to see what the recommended wire size is for your specific needs and distance from array to charge controller:


Tuesday 8th of December 2020

Being a "newbie" to the diy community with a school bus as my small family and I's new home the electrical is probably the most challenging aspect of it all. Knowing what is need by appliances (voltage, amperage,etc.) and than laying out where each appliance is located will ultimately determine how my electrical will be wired. I'll continue to explore your site and see what pops out. Just unsure about how electrical works, wiring, fuses, etc. Thank you for posting what you have as it's been informative so far Nate. As I already stated I'll keep perusing your site, any advice you can extend is greatly appreciated. The main thing is to not make my home on wheels an electrical time bomb through ignorance.

Nate Yarbrough

Tuesday 8th of December 2020

Great! Glad you've found it helpful.

Michael E Thornton

Wednesday 18th of November 2020

The wiring diagrams I can see on my Chromebook and Lenovo all-in-one are not interactive. How can I access those?

Nate Yarbrough

Tuesday 29th of December 2020

My newest diagrams are no longer interactive. The interactive functionality didn't work very well so I have phased it out. Watch the video on any of the diagrams found at to see how to use the most recent wiring diagram pages.


Friday 30th of October 2020

Hello Nate - I watched a good video by you on how to crimp battery lugs and ring terminals. In the video you mention that you have a blog post about procuring good quality heat shrink terminals. I've searched all the blogs I could find by you but couldn't find any blog posts on heat shrink terminal recommendations / procurement. I have used (and liked) 'Ancor' heat shrink terminals but they are very expensive and difficult to obtain.

Please inform me (or send me a link); What heat shrink terminals do you like and where do you get them?

Thanking you in advance for your help, David Osborne