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BrightCandle ,

These plugin systems are quite interesting, they allow renters for example to get some benefits of Solar without having to make permanent installs. The systems a lot cheaper than a full setup but obviously don’t produce the same amount of power. I first saw them appearing in France and then since Germany changed the law to allow them its good to see it flourishing there too. This isn’t going to save the planet but its a little step of improvement.

400 Euro isn’t bad for all the fittings and inverter and the big benefit of these DIY systems is you just put them together and connect them to a standard wall socket. Constantly just saves you money on your bills when there is sunshine. Its also not enough power that its worth dealing with export tariffs but in countries where smart meters already exist it could be part of the mix.

catloaf ,

You just plug them into an outlet? Is there no safety concern about backfeeding power, especially if someone turns off the breaker and expects a circuit to be de-energized?

zaphod ,

They’re not supposed to be grid-forming and should turn off if there’s no grid voltage. And if you turn off a breaker you should always check that there’s no voltage, you might’ve turned off the wrong breaker.

catloaf ,

That’s good then. Although I hope they also considered what happens if there’s two of them on a circuit, because if the mains power goes off, but there’s another panel on the same circuit, they’d each see the other’s voltage on the line, right?

And yeah, you should verify that a circuit is de-energized after you flip the breaker, but I’ve seen both some real weird electrical work, and some electricians who aren’t that careful.

DaBPunkt ,
@DaBPunkt@lemmy.world avatar

They generate no frequency so the situation you fear is not possible.

catloaf ,

The panels themselves are DC, but there’s an inverter feeding 120V 60Hz (or whatever) into the wall, right?

silence7 OP , (edited )

Yes, but it’s a system that is designed to sync with the frequency of whatever other electricity is out there, and it shuts of if the main shuts off. Almost all rooftop systems without a battery in the US are set up the same way.

Still, it’s important to check that things you think are disconnected do not have current flowing through them. And this makes it more important.

SkavarSharraddas ,

Although I hope they also considered what happens if there's two of them on a circuit

The regulations allow only for one. If you want a bigger install than that you need individual approval I think.

DrunkEngineer ,

Not mentioned in the article is that these systems are still illegal in the US.

Zahille7 ,

Because fuck us apparently.

Dran_Arcana ,

do you know why they’re illegal? is there some danger to them?

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Rooki ,
@Rooki@lemmy.world avatar

“Bargain Prices” - Aka still multiple tens of thousands for the initial purchase + setup costs.

Additionally after their usuable age they will need to be replaced with again tens of thousands of euros.

I wouldnt say its payable with a common wage. Either a loan just for solar or heritage.

31ank , (edited )

You can get a 800Wp (max allowed Wp for a balcony solar) kit in austria for around 500€, germany is currently limited to 600Wp so it should be about the same price or cheaper. And you just need to plug them into a schuko outlet, so most people should be able to do it themselve.

Edit: Fixed units

kELAL ,

I felt a great disturbance in the Force, as if thousands of physics teachers suddenly cringed and started yelling “Get your units right!”.

spoilerWh is a unit of energy (1 Wh = 3.6 kJ) and by nature cumulative. And cumulative units can’t peak, so Whp [sic] is impossible as a unit. What you really meant is Wp, as W is a unit of power (1 W = 1 J/s), which is a momentary value and momentary values can peak.

31ank ,

Luckily I’m not in school anymore xD

But thx for correcting me, edited my post, should be correct now :)

smokinliver ,

My dude did you even read the article?

smokinliver ,

My dude did you even read the article?

Pancito ,
@Pancito@lemmy.world avatar

Wtf? Read the article. It’s about 400 Euro full set ups

BakedCatboy ,

Bro the article headline even says balcony railings. We’re talking single solar panel + plug in micro inverter type setups. That’s like $200 if you shop around.

And not sure if you’re aware, but after the “usable age” the system produces at like 80% capacity, so unless you disconnected from the grid and really really need that last 20%, you don’t need to change a thing and can keep using it way past the warranty period. Or you can add a couple extra panels. Why replace the whole thing lol.

schnokobaer ,

299€ for a complete 840 Wp setup at Lidl the other day.

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