Solar optimizers with some neat features
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- เผยแพร่เมื่อ 25 มิ.ย. 2024
- I got the opportunity to attend some solar safety tests on Cyprus. The tests showed some cutting edge safety technology that prevent rooftop fires. On top of that I organized some unexpected efficiency testing and was surprised about the results.
The conducted tests AFCI and RSD.
Huawei FusionSolar: solar.huawei.com/en
0:00 Intro
1:21 Test plan
1:45 Arc Fault Interrupter tests
4:10 Detection methods
5:07 Rapid Shutdown tests
7:02 Test facility tour
9:55 AFCI high voltage
11:03 Optimizer work principle
11:54 Optimizer test
15:35 Conclusion
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The optimisers are interesting to me, from an engineering POV, could they just be MPPT controllers? I don't see why one couldn't just setup a per panel MPPT to output a common voltage, then wire up the outputs of the controllers in series, should work provided they don't share a common ground. Might be an interesting experiment.
from what I got they communicate over the line so probably the logic is in the inverter but certainly the optimizer can act as a step-down converter to rather match the current. maximum power point could be a high voltage but lower current compared to the other modules. so there is some balancing going on
@@bitluniInteresting and thanks for the pin, and response. I'd be very interested on a cheaper DIY solution though, I like to engineer my own (problems)solutions :).
those ones as the solaredge ones need a lot of energy per panel and for every hour they are running afaik. Solar edge are power monsters. Andreas Spiess the guy with the suisse accent has taken his optimizers out of the production due to the consumption.
hoymiles got microinverters, it's installed under the panels and each panel's got its own input pair
I love how when you asked if they collect any data about the fault, the huawei guy specifically mentions they might collect data with the permission of the user 😒😒
And collect data without permission, probably. Not just an issue with Chinese products, unfortunately. As long as their devices can work without being connected to a 'cloud' service and needing an account, that will do.
Loving the more documentary style videos!
So the optimizers are like DC-DC converters per panel. Based on my research, if you are only worried about shading on a few panels, then you only need to install optimizers on those few panels.
Except for those inverters that need optimizes on every panel and obviously you would loose the security features
@@TecSanento I don't know about Huawui equipment but with competitive Tigo panels you can get optimizer+RSD modules as well as cheaper RSD-only modules. With RSD-only modules you wouldn't lose any safety but I suppose you would lose some monitoring functionality.
@@eDoc2020 but how do those rsd panels shut down without electronic optmisiers?
@@TecSanento They contain simpler circuitry which only is capable of on-off switching. No two-way communication, no inductors, no high-frequency switching, probably just a MOSFET or two driven directly from a cheap microcontroller.
I thing you have to treat the roof panel fire just like a oil pan fire. you just need to throw a large wet blanket over the roof.
Wet to keep the blanket cool during the fire, and to remove the sunlight from the panel so it stops adding fuel to the fire.
So we need to design a wet blanket cannon. 🙂
Also how about big magnets around each connector to pull the arc away as in DC relays with magnet arc suppression. 🙂
Dauerwerbesendung
bitluni can you make a game engine for the esp32 with your vga library, to show the capabilities of the esp32?
I thought micro inverter solar panels on each panel solved the problem of partial shading.
I guess I was wrong.
It would work
I had that part in a 25 min version of this video but I needed to cut it shorter. microinverters are certainly a solutionif they can can compete in the purchasing costs. I can imagine the optimizers are competitive there.
@@bitluniAlso micro inverters are not useful for non grid tie applications, like caravans and fully off grid systems that charge banks of batteries.
@@gnif but you use the off grid version.. but for most small or off grid it's DC to DC with separate AC.
@@guywhoknows I was addressing the original post, micro-inverters step the individual panel voltages up to AC grid mains, which solves the problem for Grid Tie setups. It does not solve the problem for smaller or completely off grid systems, which is my point here. It doesn't matter what you state about off grid setups, the OP was asking if micro-inverters solve the shading problem, which they only do IF you are grid-tied.
Try to design and implement a potential energy battery for home use.
I've always wondered what size tension spring would need to be to store enough energy for a residential home.
To big - I calculated raising the house about 1 meter is not even a single kWh
This is really a fun and full of knowledge. Would to see more. I would love some subtitles too. :D
Working on it!
How to make ultrasound imaging patch that can connect to microcontroller?
quite a difference with just a 1.6V drop? did other panels increase their voltage at the same time?
Probably free vacation that required a video, but still it was hard to follow what and where and how.
Only if you consider this a vacation:
10h Airports, 4x security checks, 12h Airplanes, 10h of filming, 8h car drive, 6+5h of sleep, 2h of pool, 2h restaurant, 1h at the sea
I went there on Monday and returned on Wednesday
@@bitluniThat sounds like one of my typical vacations :)
Hope you got to enjoy a bit of it at least.
At least my guy went to the sea
This was great! However I wonder if the biggest danger is any battery storage in the system, and not the PV cells and associated electronics?
It really depends on what you define as "danger".
A fault on the roof is going to result in a roof fire. No batteries needed.
And speaking of fire, some of those tests were to confirm the system handles rapid shut down, which is what might happen when emergency services is trying to fight a pre-existing fire. You don't want your solar system trying to push power into a building that is off because water is being aggressively sprayed into/onto it.
Is this a visit to the University of Cyprus or a Huawei sponsored video or is UC only using Huawei? The arc tests felt like an advertisement.
In any case this should be labeled more clearly.
Cade o video do kt0803 fm.pll ..😮😮😮😮
Give Huawaei some love? Are you serious? Seen Brendon's recent subway piano fiasco?
Hello!! I have problems with ov7670 without fifo!!!
that camera is a nightmare
@@bitluni for sure hahhahha, luckily I solved it all yesterday!!
Now that's definitely a bit looney...
How can i make portable ultrasound imaging that connects to arduino? it will be to control bionic prosthetic hand
Optimizers are nothing new. I have them from solaredge due to shadow from trees.
It was certainly new to me.. I might have just entered the bubble since afterwards I caught attention some other instances claiming it as a breakthrough. If the purchase cost is justified they are here to stay
@@bitluni tbf they are new for huawei 🙂
Lol why would you dismiss ohms law ?
The current is not the power, if they drop, say 6.1 and 6.3...
But the voltage is 450 and 400...
That's 2745 and 2520.
So it's not optimised for max power, but max current at the cost of voltage meaning less power.
I can't think of an application where just the current was essential....
I have seen like for like tests carried out with optimisers, there was not really any difference.
But interesting to know they are just current monitoring buck converters.
Fire prevention is the afd (arch fault detection) a lot of inverters have these built in these days.
But was due to wire rub, or connection faults. But most recorded fires were down to DC isolator switches, they updated the regs last year or so ago.
If you have many optimisers, they don't know the full power, as they are all trying to make the maximum current. On a cloudy day that's going to be low, so they all lower the voltage.
Oddly a mppt inverter, will change the voltage to maintain power this effects the current and voltage together to get the best result.
On my system I have a shaded panel, I also have diodes in the box on the panel. When they vary a lot it will by pass the panel that's shaded as I can see my voltage drop for that panel.
No optimisers, required. I can see how it would work on really old systems which don't have diodes or mppt solar tracking... But not on anything made in the last 4-5 years.
Not the problem is that you could at together multiple panels with different voice just but if the current is different one panel with lower current will block current from other Panels, so it's better to keep them at the same level
huawei kinda sketch
haha huawei, turn it off, firewall it off the internet...
Without subsidies or tax break no one in his right mind would run solar where there is a grid close by. PV is bad for the environment. Production is dirty.