this post was submitted on 11 Feb 2025
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(page 2) 50 comments
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[–] [email protected] -3 points 17 hours ago

"100 million smokers can't be wrong!"

[–] [email protected] 29 points 19 hours ago* (last edited 19 hours ago) (7 children)

Home solar indicates a massive management failure of public utilities. If it is more cost effective and more pleasant to generate your own electricity without any economies of scale, something is very wrong.

Source: I live in California where the “public” utility is an absolute disaster that charges $.60-$.70/kW/hr so anybody who can afford the upfront cost of solar has done so.

[–] [email protected] 4 points 18 hours ago

Shoot, my electric is like $.0625/KWH

But there is also another 75-100 bucks tacked on as fees. Tempting to go solar and disconnect from the grid. Even without selling energy back to the grid, I would break even. (Savings over 20 years ~200 bucks)

[–] [email protected] 20 points 18 hours ago (6 children)

Microgeneration makes way more sense to me. If you generate the power where it is used without pollution, we should. The unfortunate piece is we have to many landlords who's interest are too divorced from their tenets to put up more microgeneration

[–] [email protected] 11 points 17 hours ago (4 children)

These microinverters aren’t made of fairy dust. Doing this stuff at utility scale uses a lot less nasty minerals and chemicals.

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[–] [email protected] 6 points 18 hours ago (1 children)

Makes sense mathematically or you think makes sense?

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[–] [email protected] 3 points 18 hours ago (1 children)

I live in an area where there is a monopoly of power supply by one of the worse polluters in American history, in a small area within a county there's an existing co-op power company that was basically grandfathered in because it's been in existence for so long while no other competitors are allowed in the area.

That co-op when I lived in the area was about half the cost of the monopoly company, a relative gets actually paid to be a member because they received their fathers account when he passed away and extra funds are distributed among all the members based on how long they've been with them (a little weird, but at least better than shareholders getting the profit).

You are absolutely right that the electric companies as a whole have failed, they've been allowed to amass too much influence and coverage while squashing any kind of competition. Why electrical needs aren't considered a national resource is mind baffling to me. Our country and citizens way of life would literally grind to a halt without it.

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[–] [email protected] 5 points 19 hours ago

The rent seekers making everything worse again

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[–] [email protected] 46 points 20 hours ago (2 children)

My dumb ass: “Is it just 1.5m Germans, or other heights too?”

[–] [email protected] 19 points 19 hours ago (3 children)

M in million should always be capitalised for this reason.

1.5M Germans vs 1.5m Germans

[–] [email protected] 6 points 17 hours ago

1.5 10^6 Germans vs 1.5 10^-3 Germans

[–] [email protected] 4 points 17 hours ago (1 children)

Until I read this comment I was 100% certain the post was about short Germans somehow preferring having their balconies occluded by taller-than-them solar panels.

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[–] [email protected] 32 points 19 hours ago (2 children)

Megagermans vs milligermans

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[–] [email protected] 23 points 1 day ago (3 children)

This is really nice! This is the future!

I'd love to know how much they produce, especially during the winter/monthly.

[–] [email protected] 2 points 17 hours ago (1 children)

That kind of depends on what you're building. Standard is currently 800W (2 standard solar panels). Older models use 600W, other models are using 2000W and limit it to 800W. That doesn't make much sense, but skirts our local regulations that limits them to 800W, but of course generates more energy.

It then also depends on where you live. Can you point it to the sun? Do you live in sunny Spain or in northern Norway? In Germany a 800W system can produce 800-1200kWh per year. Our average electricity price is at 0.35€, so you'll save 280€-420€ a year. And those systems are dirt cheap, there are deals out there where you can get one for 200€. That is quite a good ROI for something that you can install in an hour.

[–] [email protected] 1 points 17 hours ago (1 children)

Yeah I get all that, but what if I need heating in the winter and have very low consumption in the summer? That is why I'm searching for real world numbers. If you give me some for a specific place then I can at least have a ballpark number if what I might get where I live.

OTOH as you say, they start to be so cheap it's almost impossible to go wrong...

[–] [email protected] 3 points 16 hours ago (1 children)

That won't really work as that is the worst scenario for solar. I can give you real world data from southern germany. I don't have balcony solar, but a 13,4kWp solar system on my roof. Here is the data from this year:

As you can see, days are getting longer in Feb, generation is going up. To get a rough estimate, take my data and divide it by 16,75. That won't give you a lot of heating, esp. with a normal space heater. Even if you had a scenario, where your 800W solar system would produce 800W in the winter, your space heater will suck 2000W. Take a look at its power cord, you'll see how much it uses.

So yeah, 800W is not much, but will cover your running appliances like your fridge, freezer, router or computer on sunny days.

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[–] [email protected] 8 points 22 hours ago (2 children)

In the Northern hemisphere, in Winter the Sun is at a low angle, so vertically oriented panels might produce more. As an example, I have a sunroom and at Winter's Solstice the sunlight reaches about 3-4 meters into the room. At Summer's Solstice there is no direct sunlight in the room, as the Sun is overhead.

[–] [email protected] 5 points 19 hours ago

couple of things to note:

  1. Not every balcony is southern facing
  2. Most older European homes don't have A/C yet, so electrical costs are more during the winter months (that trend will change though I imagine)
  3. I think the numbers @[email protected] was asking about involved power output, that of course depends on the size of your array, daily/monthly/yearly differences in weather, and all sorts of little nuances that's hard to say without averaging out years worth of data.
[–] [email protected] 2 points 21 hours ago (1 children)

Do you have any numbers :-) ?

[–] [email protected] 4 points 20 hours ago (1 children)

I have a sunroom, what sort of numbers are you asking for? It's a partly cloudy day, about 22C in the room, without heat. And about 7C outside.

[–] [email protected] 3 points 19 hours ago

Nice numbers <3

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[–] [email protected] 13 points 1 day ago

Wait that’s a thing?

Holy shit that a thing!? That’s awesome!!

[–] [email protected] 4 points 1 day ago

Would be nice if grid tied inverters weren’t such a regulatory PITA. Micro-deployment solar, and more importantly distributed energy storage, makes so much sense and could solve a lot of grid-related problems.

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