How To Properly Fuse A DIY Solar Panel Array

Learn how to properly fuse a DIY Solar Panel Array by watching this video. In the event that your solar array needs to be fused because the Array Short Circuit Amperage is greater than the Panel maximum series fuse rating - you must fuse your array at the point where the panels or series strings get combined to prevent potential fires or overheating due to a faulty panel.
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100W Solar Panels: offgridstores.com/products/ri...
2 To 1 Parallel Connectors: offgridstores.com/products/ri...
MC4 Inline Fuses: offgridstores.com/products/ri...
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[@offgridstores]

First Time Customers Get 10% Off Their Order With Code "10%NOW" At Check-Out
Items Used In This Video:
100W Solar Panels: offgridstores.com/products/rich-solar-100-watt-solar-panel-rs-m100
2 To 1 Parallel Connectors: offgridstores.com/products/rich-solar-y-branch-parallel-connectors
MC4 Inline Fuses: offgridstores.com/products/rich-solar-inline-fuse-holder-with-fuse

[@alanblyde8502]

Great explanation mate, I’ve seen many other videos trying to describe this and it’s clear and concise 🇦🇺👌

[@hopeuluv979]

Thanks for making this video.😊

[@danielthomas8569]

This is good news for me this is the set up I'm going to use for my greenhouse. Thanks for your help.

[@offgridstores]

Glad to hear it! You’re welcome

[@jerrym995]

how about when in series/parallel?

[@jonnytacooutdoors]

Thanks so much for all the great information!

[@offgridstores]

Glad you liked it!

[@residentboejiden5796]

Glad i could understand it. That is the real miracle, thanks for the easily explained important information

[@residentboejiden5796]

Help a guy out if it were 2 12 volt to make a 24 in parallel, we would only need fuses in the parallel part and not in the series part cause voltage is additive right?

[@marks2254]

Thanks for the info. Great video. If you do blow a fuse, does that mean one of the panels is bad and needs to be removed from the system? Or do you normally replace the fuse and go on your way? Is the bad panel the one whose fuse blew or the other one?

[@anotherbrickoutthewall9237]

I have a 200w renogy solar panel going to a renogy 50amp dc to dc with mppt would that need a fuse on the positive cable and if so what size fuse? Thanks for the video just trying to get my head round it

[@radstorm]

Thank you for this, and getting to the point. :o)

[@airfoil]

Thanks for simplifying these connections, I'm building a small off-grid solar system and this is going to be very useful.
However, I have a couple of questions w.r.t, a parallet connection setup:
1. Wouldn't the diodes on each solar panel prevent the entry of current into a panel that has shorted?
2. In a parallel setup with 3x 200W panels with a max current of 9A each, if I were to put in a 15A inline MC4 fuse, would the current from the other 2 panels (18A total) possibly reverse flow and blow the inline fuse which is rated at 15A?
Thanks for your replies, cheers!

[@WiSeNhEiMeR-1369]

WOW !

[@joe84bmw]

I have one panel that’s 15a and came with the rv and adding two more that are 20a rated. All are renogy 200 watt panels, would I use a 15a and 2 20a fuses or make them all 15a? Im not very good at this 🥴

[@panospapadimitriou3498]

does a diode work as a fuse..? because i ordered correct amps for my 240w pvs but not fuses ...they got diodes inside !!! my kyoceras are 10years old and i dont think they have diodes.. they used to be installed in series in a big park!!!

[@juandelacruz1520]

Solar panels are more like a battery when discharging to a load

[@markdove5930]

I have a question...
I have a 300w solar panel and a 12v 50ah battery and for some reason it doesn't want to charge at more than a 100w.
Is that normal?

[@bestillandknowthatuaregod]

What Fuse Size for 150W Solar Panel - ISC Amps 8.76 should I use? THANKS

[@oranusichigozie5219]

In series use 8.76 X 1.56

[@Snailmailtrucker]

OK, so now how many volts is ok to have coming into my 12 volt battery bank ? I have 2 x 330 watt Solar Panels. I have 2 x 12 volt 100 ah batteries in parallel. My 330 watt panels are rated at Open Circuit Voltage at 41.0 volts, Open circuit current at 10.33 amps. I have an Epever 30 amp Solar Charge Controller. Thanks Liked/Subscribed !

[@davebenz8271]

“Short-circuit amperage”, not “Short-circuit voltage”. Right?

[@offgridstores]

Yes amperage.

[@ONAHANDSON]

Must 2 panels in parallel be fused?

[@debbiedogs1]

Connecting in parallel adds amps together from all panels, so fuses are the best idea. Connecting in series keeps amps the same as just one panel, but adds volts of every panel in series, so there are different factors involved with each configuration. There are other videos about this, one of the clearest I have seen is by Jason on the Jasonoid channel.
th-cam.com/video/OZvrTuhJhXs/w-d-xo.html

[@mangeload]

How should I fuse in series? 4 x 100w panels

[@offgridstores]

You don’t need fuses if it’s 4 panels in series

[@mangeload]

@@offgridstores I know you don't need them, but I want to have extra protection

[@mangeload]

Maybe I'll fuse it as if it is one 400w panel?

[@mangeload]

Can you recommend a good dc12v circuit breaker?

[@alflores4220]

@@mangeload Renogy sells a 400-watt kit, they actually include a 10 amp in line fuse (and a 40amp ANL fuse too, but that fuse is for the controller to battery line not what you are asking about) On their schematic they show the inline fuse as going on the positive cable that is going to the controller. And that kit is four 100-watt Renogy mono panels.

[@MikelRae]

How would I fuse 4S2P 100 watt panels?

[@offgridstores]

The same way I described in this video

[@MikelRae]

The maximum series fuse rating on my panels is 12A. I can’t find a fuse of that size.

[@assortedmountainlife]

@@MikelRae Go with 10A then.

[@MikelRae]

@@assortedmountainlife That’s what I ended up using. Appreciate the response still though.

[@Dave-xr9bc]

so 2 panels in parallel dont need a fuse?

[@billisnice]

Buy Isc 15 amps panels.

[@OWK000]

So, this type of fusing would prevent the type of fires of Tesla panels on the Amazon roofs? Also saw a newish NewPowa panel on TH-cam today and it was just starting to melt thru on one spot on the panel and the owner of the setup just had the panels leaning against the house, although plugged in, was still doing some changes, and so noticed before it started a fire and uplugged. If panels have more diodes than they used too, why do more new panels catch on fire? One other guy claims bird shit in a strategic spot can cause a fire. Long winded guy, got nothing out of that video: he didn't convice me. NewPowa panel was probably just a bad panel, so that doesn't prove anything.

[@ralph332]

Issc is very close to Imax!!!!!! WTF are you doing?

[@MacGyver1946]

What a joke...even if you have a short circuit it won't blow a fuse. You really know how to confuse people and make it clear as mud.

[@Just_An_Idea_For_Consideration]

Geez!!! Buy a tripod!

[@offgridstores]

Will do

[@joe84bmw]

I have one panel that’s 15a and came with the rv and adding two more that are 20a rated. All are renogy 200 watt panels, would I use a 15a and 2 20a fuses or make them all 15a? Im not very good at this 🥴