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Forum Games / Re: Visual Counting
« Last post by ella on Today at 03:24:46 AM »
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Skepticism / Science Talk / Re: Climate Change Catchment Thread
« Last post by Desert Fox on Today at 12:56:05 AM »
I guess my point isn't getting through, but I don't see much of a point in repeating myself ad infinitum.
I got it, and I agree with you.  There is zero evidence for any runaway feedback on the planet, no matter what level of CO2 in the atmosphere, there has never been any evidence of a runaway climate system.

There is evidence of runaway greenhouse during the Permian–Triassic, I believe.
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Tech Talk / Re: Going Solar
« Last post by bachfiend on Today at 12:14:28 AM »
Yeah, I’ve never heard of anyone having three-phase power in their home.

When I was installing more solar panels on my house, the first question my installer asked was whether my house was three-phase or single-phase, and to send him a photo of the meter for him to determine.  So three-phase isn’t uncommon in domestic use (its apparently more energy efficient than single-phase).

I don’t remember whether I’ve got three-phase or single-phase.

I installed more solar panels in order to recharge the electric car when I eventually buy it.  Actually, I currently have far too many panels.  Towards the end of Winter, they’re generating some days more than 30 kW.hr per day (I actually use very little electricity - usually around 3 kW.hr per day).  At least I can think that the excess electricity going to the grid will be my carbon offset for when I fly to the other side of the world, which I do once a year.

I thought about batteries very briefly before rejecting them.  They don’t make any sense in a practical sense (storing excess electricity in batteries and then using it later loses at least 15% of the energy) let alone financially.  It’s better, on a global warming mitigation basis, to put excess electricity into the grid and reduce the electricity coming from fossil fuels.
The cost-benefit of battery storage is a little complex and is something requiring individual assessment.

Much depends on the price you pay for grid power, the price you get for selling any excess power to the grid and how each varies with time of day. And the cost of the installed battery of course.

For example, where I live the grid power price during peak period is nearly 4 times the price of off-peak power.
The solar power feed in tariff (what you can sell your excess to the grid for) is less than the off-peak power price and has no time of day variance.

Peak power pricing occurs during early evening and corresponds with little to zero solar power production.

So use of stored battery power during peak period may or may not make sense depending on how much the battery energy costs over its lifetime.

So for example - rather than send excess solar to the grid and only get $0.12/kWh, instead store into a battery and use it to offset power requirements when the grid price is $0.55/kWh.

Once I have better time of day usage data then I'll be able to build a model to assess the cost-benefit and scale a battery to suit.

Currently here in Australia battery storage is still ~$1200 per kWh of battery capacity installed. With a 10 year warranty and reducing to 80% capacity after 10 years, that's paying $0.365 / kWh over its warrantied lifetime assuming a full charge/discharge cycle once every day on average. That is quite a bit less than the peak power price, so that might seem to make sense.

However that's a pretty generous assumption on the average rate of full charge/discharge cycles, being once per day. If you are less generous in the assumed cycle rate you achieve, say once every two days on average then battery power now costs $0.73/kWh over its warrantied lifetime and it's now a more expensive way to pay for your peak period power needs.

The actual cycle rate will depend on the size of the battery, the "solar weather" patterns,how much power you use during the peak period and so on. You also need to consider whether you can actually use all the stored energy within the peak period. Some batteries have low power outputs and might be oversized for the job.

This is why having time of day usage data is really important, as is the ability to have a battery properly scaled to your usage patterns. The solution I have gone with will enable me to add battery storage in increments of 2.4kWh, so I can scale the system to maximise the battery cycle rate and be focused on providing my own power when the grid price is very high.

Above are $A, not $US.

Agreed - if your prime concern is in saving money, then very considerable analysis of the economics of installing batteries and the changing tariffs during the day are very important.  If your prime consideration is global warming mitigation, not so much.  In Perth, we don’t have smart meters yet.  Electricity is charged at around 28 cents/ kW.hr regardless of the time of the day.  When I installed an extra 16 solar panels, I lost the 40 cents/kW.hr feedin tariff, leaving just 7 cents/kW.hr for excess electricity exported to the grid instead of 47 cents (I knew that was going to happen).

It’s advised that if you should use electrical devices while the sun is shining in order to reduce your electricity bill.  I don’t bother with that - using just 3 kW.hr of electricity it hardly makes any great difference financially.

I’m still amazed at how the Australian government is so global warming denialist.  Crikey.com this morning noted that Scott (Old Man Coal) Morrison (the new prime minister) is even more denialist than Tony (‘climate science is crap’) Abbott.
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General Discussion / Re: Open carry...
« Last post by Eternally Learning on Today at 12:12:29 AM »
One group of people being interviewed were from some open carry state and they were interviewed in some bar. Drinking. While armed with handguns.

I went out with some police friends to see Super Troopers 2 and we got some drinks before the movie which was the plan.  One of them carried his handgun with him and everyone there called him a fucking moron for doing that when drinking.  It's absolutely insane to me that people think open carry with no training requirements, no requirements for safe practices, no restrictions at all basically, is a good idea.  I mean, if the idea is to be ready to defend yourself, defend others, run in and save the day during a mass shooting, etc. then you should have no problem with mandating at least the same level of training and education for those situations as the people our federal, state, and local governments mandate the people whose jobs it is to do those things.
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Games / Re: New Roll20 Game With Y'all - Old School GAMMA WORLD
« Last post by wastrel on September 18, 2018, 11:34:38 PM »
Sunday should be pretty open for me, after my satanic rituals and whatnot.
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Health, Fitness, Nutrition, and Medicine / Re: Flu Shot 2018
« Last post by brilligtove on September 18, 2018, 11:31:13 PM »
I'm a bit immuno-suppressed, so I'll be asking about what my best options are with my Dr this week.
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Games / Re: New Roll20 Game With Y'all - Old School GAMMA WORLD
« Last post by brilligtove on September 18, 2018, 11:27:41 PM »
instea...

hahahha...

wait, you don't mean "Instead of Saturday morning sex while the kids watch cartoons" do you? 'Cause I will NOT be RPGing on a morning EVER, I think.
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Games / Re: New Roll20 Game With Y'all - Old School GAMMA WORLD
« Last post by PANTS! on September 18, 2018, 11:09:21 PM »
I can Sun all day, pretty much.

Lets hear from the rest of ya.  We can do it instead of Church if'n y'all like.
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Skepticism / Science Talk / Re: Climate Change Catchment Thread
« Last post by Gigabyte on September 18, 2018, 11:09:16 PM »
I guess my point isn't getting through, but I don't see much of a point in repeating myself ad infinitum.
I got it, and I agree with you.  There is zero evidence for any runaway feedback on the planet, no matter what level of CO2 in the atmosphere, there has never been any evidence of a runaway climate system.
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General Discussion / Re: Open carry...
« Last post by arthwollipot on September 18, 2018, 11:06:02 PM »
<sigh>  Pedants ruin all the jokes.  It's worse because they are right.   :P

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