Testing MEGA Fuses + MEGA Fuse Theory

[@cleversolarpower]

My recommended fuse: amzn.to/3XhiJdd MEGA fuses for 48V: cleversolarpower.com/go/CCMEGA48V Let me know your thoughts in the comments.

[@Detour4it]

You bring the most important detail of safety in solar power systems.

[@cleversolarpower]

This test surprised me, so I will be doing more with different fuse types.

[@DEZMoreni]

Great video Nick. Thank you for taking the time to perform fuse testing.

[@cleversolarpower]

What fuses do you want me to test next?

[@utb3]

This is what ppl want to know! very informative video! thank you!

[@paulyoung4817]

Thank you for this testing Nick very nearly bought 2 Bojack Mega fuse last week from Amazon!

[@cleversolarpower]

Now you know which ones to get. Glad I could help.

[@jimbaggett1233]

Great video Nick, was very informative. I'm really interested in finding out more information about the parts used in your AC monitor and why you chose those parts.

[@cleversolarpower]

This is the AC watt meter i'm using: amzn.to/4cWsPpu

[@jeffs3917]

Awesome test! I can't see anyplace that Littlefuse makes MRBF fuses, or i would just get those. Would you please do the same kind of test for different brands of MRBF please? MOST VALUABLE!!

[@cleversolarpower]

Blue Sea Systems and Bussmann make good MRBF fuses.

[@jeffs3917]

@@cleversolarpower I had JUST SEEN Bojack on Amazon when I first started looking for MRBF fuses, not 2 hours before I came across this vid -- and only an hour or so after you posted it! Talk about luck! I had even made notes that Bojack were cheaper, and maybe I would get them to to save a few bucks. Then after seeing your vid, I scratched them off my list completely, but didn't know what to get instead. I will look for LittelFuse for anything I can, and for MRBF I will stick to Bussmann or Blue Sea. Thank you!

[@sebastianlehmann3698]

When you have a short, you will really increase amperage (several times the nominal current depending on the power source) . What you are doing here is a overload test, from my point of view it is not the same as the short circuit. But it is a good video and thanks for the information.

[@cleversolarpower]

Checkout my video on fuse types. In the case of a short circuit current, all these fuses will break. It depends on the voltage if the fuse is going to arc.

[@Retired..Mostly]

I have Bojack MEGA fuses installed in my RV solar setup as well as my spares bought from Amazon. I will immediately replace all of them and throw away the spares to buy the fuse you recommend.

[@cleversolarpower]

Smart choice. It's amazing how they are able to sell these. If they made a quick test like I did, they would see they are not suited. Says a lot about the company.

[@Dave-xr9bc]

very informative.keep up the good work

[@miketcq8]

a great review Nick. Are you going to test ANL fuses?

[@cleversolarpower]

That's a good idea. Which brands would you like me to test?

[@owolabiadeteye5919]

Thanks boss, very insightful, keep up the good job

[@michaelfitzpatrick3641]

When using lithium batteries Mega fuses are unsuitable. All fuses have a fuse amper rating, thats the test you are making, and a maximum interrupt current rating. Where power sources like lithium batteries are used in a system, the possible fault current is very high, in the region of 7000 amps or more. Mega fuses have an interrupt maximum current rating of 2000 amps, thus its possible when the fuse 'blows' at its ampere rating, the high energy current will not only vaporise the fuse, sending molten fragments everywhere, but allow the current to 'jump the gap' sending power into the system and causing damage. Idealy with a lithium battery system you need class T, or HRC, or BS88 fuses. The DC ratings of these fuses are 125 volts and an interrupt rating of 20,000 amps. Its possible to use MRBF fuses, voltage rating 14 volts, interrupt rating 10,000 amps, as an option with a 12volt system.

[@cleversolarpower]

As I've said in the video a 12V 200Ah is the max you can use with mega fuse. How do you know the current is in the region of 7000A? According to research papers, the short circuit current for lifepo4 is 10x the capacity. So 200Ah=2,000A.

[@MasterChief4U]

Why I buy all my fuses from Del City. They meet government specs. You can buy ZCase, MIDI, ANL Limited Low Voltage non delay, Marine Rated MRBF, and Class T fuses for a nice price. And I also notice this guy actually runs 2x parallels cables to his inverter. This is the proper way to wire them. As you it over comes the skin effect of single conductors. Something the NFPA70E covers in detail...

[@cleversolarpower]

Never heard about zcase fuses. Looks a bit like MRBF but smaller.

[@MasterChief4U]

@@cleversolarpower ZCASE fuses are used where stud size is important. As they come in #6 #8 and #10 hole sizing. They are used in Robotics and Automation machines. Where fuse holders of up to 8 can be placed for high amp protection locations in small spaces..

[@curioussand1339]

I'm sure Bojack will say, "But, but, our fuses are stronger, they can cope with a lot more current than we promise"

[@cleversolarpower]

Sad that these are even allowed to be sold.

[@drpierrecaze4144]

Professor, can you do some test on the chargeverter ? Can the EG4 chargeverter work with lead acid battery for example? Can it work with the battleborn battery ?

[@cleversolarpower]

It cannot work with a lead-acid battery, but it can work with 4 battleborn batteries in series. However, why use battleborn? they are crazy expensive for what you get. Chargeverter is only 48V.

[@drpierrecaze4144]

@@cleversolarpower thank you Sir. May the Almighty bless you and your family.

[@aaronsmith593]

I've seen videos of testing an ANL fuse. At what current does it blow? Well they showed A 100 amp ANL fuse blows at 110 amps. But others videos say it won't blow till 200 amps. How can there be that much inconsistency ???

[@cleversolarpower]

You need to look at the datasheet of the manufacturer. If the manufacturer doesn't have a datasheet, then don't bother buying the fuse.

[@JFK666666]

VERY usefull video - thanks :)

[@cleversolarpower]

Thanks for your sub!

[@drizzt8965]

My wife and I just purchased an Anker Solix f2000 and a Renogy 400w folding suitcase portable solar panel kit. This will be used for power outages and camping, I was wondering if you have any advice for this type of set up? I am going to buy your book "Off Grid Solar Power Simplified", we are (out of nowhere) suddenly very interested in solar power....

[@cleversolarpower]

Don't buy my book, after reading it you will want to return the Anker solix 😄

[@drizzt8965]

@@cleversolarpower Oh no! What did we do wrong? And what should we do now? 🤔😕

[@drizzt8965]

@@cleversolarpower What should we have done? Any advice would be greatly appreciated.

[@whatnow9653]

Thank you.

[@cleversolarpower]

My pleasure! Thanks for the sub!

[@dan32one44]

Nice 👍 who knew..

[@cleversolarpower]

I was surprised as well.

[@JamesChambers-i6x]

great videos :)

[@cleversolarpower]

Thanks!

[@peckerpeter2078]

Very important here to protect your system plus protect your wires way before they melt and catch fire. How many of these are UL listed? Are they 1973, UL 9540 like the batteries need to be. Seem like you should under amp fuse for safety depending equipment being used, definitely make wires have safety margins. I guess every one needs to buy 3 fuses just to test making sure when fuse blows like shown here. There’s a lot of DC equipment that’s not rated correctly and shouldn’t be used. Those other fuses are a fire hazard plus you would lose your whole investment.

[@cleversolarpower]

Fuses sold online do not need to be certified, that's the danger and that why independent testers like this video are required. When sizing the wires, you should always size the fuse under the max current capacity of the cable.

[@peckerpeter2078]

@@cleversolarpower 100% 💯👍🏻 couldn’t agree more, UL listed is a must for electrical parts I purchased. You also pointed out in this video rebrand names. Best to buy straight from the source save big plus highest quality. Can’t stress UL listed enough. I find it difficult to find quality DC components, electrical fires are no Bueno. Appreciate your testing is there any fuses you recommend that aren’t online that are rated closer to 125v?

[@philipgrobler7253]

Hallo Nick, thank you so much for all your information. I unfortunately have already purchased two 120AH solar deep cycle gel batteries and two 100AH solar deep cycle gel batteries. Will I be able to connect these four batteries in series to provide 48V for a 48v solar inverter? I need to build a 48v solar system that must provide power for 5 lights, a microwave, and two standard fridge freezer combos. I will be using propane for cooking and a propane geyser. I have funds available for the following bifacial solar panels, with these specifications, so how many of these do I need: SPECIFICATIONS: Peak power (Pmax): 650W Open Circuit Voltage (Voc): 45.9V Max Power Voltage (Vmp): 41.77V Short Circuit Current (Isc): 18.57A Max Power Current(lmp): 15.57A Power Selection: 0 ~+ 5W IEC 61215-1/1-11-2;2016 and IEC 6173D-1/2;2016 certified Safety class based on IEC 61140: ClassII Maximum System voltage: 1500V Maximum Over current protection Rating: 25A Power Production tolerance: +_3% Open circuit voltage Tolerance: +_2% Short Circuit Current tolerance: +_4% Size: 2279 x 1134 x 35mm Weight: 28kg

[@JFK666666]

kzbin.info/www/bejne/oJCXo32JaJp6fJY kzbin.info/www/bejne/f3TPqq2EmpqrgpY

[@cleversolarpower]

You are faster than me. I was going to send the exact same links 😄, Thanks!

[@philipgrobler7253]

@@cleversolarpower Hallo Nick, I checked out the solar calculator and I see that I will need 7 x 650W solar panels (at least 4000W solar power) for my area, which is Johannesburg, South Africa.

[@creacamp9613]

👍

[@الغريب-ط3ج9ط]

❤❤❤

[@HybridBattery]

FYI it’s Littelfuse, not Littlefuse

[@cleversolarpower]

Typo 👍

[@HybridBattery]

@@cleversolarpower everyone reads it wrong and pronounces it wrong (me too at first). It’s pronounced “lit-tell-fuse”

[@KarloVarvodic]

Are you electrical engineer

[@cleversolarpower]

No, I have a Bachelors electro-mechanical engineering, but not a masters in engineering.

[@GetReal3327]

I believe when a house or building is being taking off the grid, that every electrical outlet connection should be GFCI protected because off-grid system needs additional protection when things go wrong. Really, think about it.

[@cleversolarpower]

Exactly, that's why I made a video about it.

[@GetReal3327]

@@cleversolarpower What is the name of that video?