When And Where To Use Fuses For DIY Solar
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- čas přidán 1. 08. 2024
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EcoFlow Delta Pro 3 - amzn.to/3RLBi7m
10 Amp Fuses - amzn.to/3XJGzAc
15 Amp Fuses - amzn.to/3RKAvDw
20 Amp Fuses - amzn.to/45LuqMP
25 Amp Fuses - amzn.to/3XH4aRJ
30 Amp Fuses - amzn.to/3RMFDXE
I will use a recent test setup to walk you through when you need to use inline fuses for your DIY solar setup. There are a couple specification you need to consider associated to your panels and also place the fuses in the correct location to ensure your system is protected.
DISCLAIMER: This video and description contain affiliate links, which means that if you click on one of the product links, I’ll receive a small commission. - Jak na to + styl
Man, Yea! Not enough info and conversation about this on YT. Out of confusion and concern, I bought a miniature 30-amp disconnect switch/circuit breaker to put between the panels and the Delta Pro. I'm currently just using 6 -100-watt panels but upgrading to approximately 1600 watt. Few years back a BougeRV tech said I wouldn't need fuses with a 1600-watt system. Anyhow, the topic of using fuses doesn't seem to get the attention it deserves, or maybe I'm just being too careful. Those DP's sure are pricey though... Great video, Thanks!
Thanks for the feedback and yep the DP, DPU, and DP3 are not cheap. For certain applications they make a lot of sense but also good to look at the DIY path as well if you system is stationary.
Great video. This is the exact solar configuration I recommended in my delta pro 3 review video. But I forgot to mention the fuses though. Good reminder.
Yeah, I like over paneling the High voltage side a bit to stretch out the peak sun hours and get you a little more on overcast days. Overall I am impressed with the DP3 thus far and was able to charge the Cybertruck up with 9 kWh from solar yesterday from the DP3 which is not too shabby.
Thanks for doing this video. This is the exact question I had about fuses.
You bet, happy to help!
I'm a bit unclear on what kind of circumstance these fuses would help with. You've said a short that causes more current to go through a single branch.
Could you give some clarification or an example of what this type is failure might look like?
Heliene 66M HJT All Black Module - 360 watts on DP3 have a VOC of 48.62 so 3S puts these at 145.86 volts at STC. These panels in 3S will exceed VOC of 150 volts when panel temperature gets below 14 Celsius or 57.1 F
Thanks for running the numbers. Appreciate the help!
Great information. Thank you. I'm currently running the DPU with 4 batteries for a total of 24kw. I have (8), 400w panels, in series, charging the DPU. I plan on only solar charging at this time and only using it to charge up my 30kw, Nissan Leaf. Hope you can help me or anyone else with my questions. Do I, should I, ground the DPU unit? I see a ground screw on the unit. I was thinking about adding more panels to bring the total up to the maximum allowed, which I believe is 4000w for the high solar input. Can I mix one or two more panels that do not have the same output rating? As an example...can I add two more panels rated at 375w each or one panel rated at 800w? These are just hypotheticals. Not even sure they make panels rated at 800w. Thank you in advance for any information.
On the top diagram. I am thinking no fuses would trip as the most the other string could pump in is under 15 amps? You are assuming that the top would have 10 going through the top fuse but why would it if the sink is a panel in that string. Am I wrong and if so can you explain? Thank you!
In normal operation you are correct. The fuses are just protecting against a short circuit where you might have both branch currents going through one side.
I have 8 panels - 4S2P (I think that's the notation?). They go into a combiner box with each series having a 10A fuse. I assume that covers this? The fuses are before the combination, not after.
Yeah, that should work assuming the Isc is below 10 Amps.
Great topic and thank you for the presentation. I don't fully understand the placement of the fuses or where the magic black smoke is going to come out, so I would welcome additional videos on this topic.
I’m going to be running 5s3p 100 watts ecoworthy bifacial panels. I bought a “DIHOOL Solar Panel Disconnect Switch 30 Amp Breaker Box” from Amazon. I believe the breaker would work the same as a fuse, or should I look into a legit fuse?
any downsides to undersizing the fuse if there is a ton of room between isc and max fuse rating?
i.e. isc is 11.26A and max fuse rating is 20. was thinking about doing 15a fuses
I don't think so, for instance on my Solar L side even though the fuse rating is 25 Amps I would be comfortable using 15 Amps or 20 Amps.
I suggest in the future to show the whole circuit without the fuses (red lines connected to MPPT), then add the fuses. Those hanging red lines at the start are confusing. (The connection at the EcoFlow does not change, the fuses go upstream of the existing Y connections.)
Thanks for the feedback 👍
I have two strings in series one string has eight panel 370 wide yeah the string has seven panels three out of 70 W do I need to fuse either string
I opted for no fuse. I've had two different fuse holders fail. They suck,
You say 3 bi-facial panels on your ground array, but doesn't the video show 4 panels?
There are 4 on that mount but I only have 3 of them wired in the circuit.