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Solar and batteries can power the world

nworbmot.org

431–440 of 473 posts

Re: Solar and batteries can power the world

#431

Earlier quoted context omitted.

Gotcha, you prefer to be daily dependent on fossil fuel delivery rather than get new panels every 20 years, particularly given you're in a country seemingly incapable of manufacture and minerals processing. That's certainly a position.

The US and the rest of the West are capable of manufacturing. You just said yourself they can be made "anywhere" so make up your mind. What I think is that manufacturing is not competitive in the US or the West as a whole because of wage requirements and monetary exchange rates, and additionally because we operate a mostly free market and don't penalize foreign state-subsidized products hard enough to make domestic m…

There was a test on 30 year old panels and they only lost 20% capacity.

Re: Solar and batteries can power the world

#432

Earlier quoted context omitted.

Once you have PV panels, they (on average) last 20+ years - that's not being dependant, particularly when PV panels can be mass produced anywhere. ( They do not use rare earths (inverters use trace amounts) ) China cornering rare earths (for now) is an "own goal" by every country that chose to let China (and to a lesser degree Malaysia) take a hit on the toxic by products of processing concentrates. The US is easily…

There was a test on 30 year old panels and they only lost 20%.

We (literally, I know where some are) have 30 year old panels and 95 year old men, their existence doesn't negate an average.

Also, PV panels are kinda non uniform in performance, long term studies show that one fifth of them perform 1.5 times worse than the rest.

Either way, 20 year lifetimes where you build once and reap the rewards for 20 years is sufficient to put to rest the kind of argument being made about dependancies.

That's more than enough time for any G20 country to be making it's own PV production chain.

Re: Solar and batteries can power the world

#433

Earlier quoted context omitted.

People still build houses like energy is cheap and abundant. A properly insulated house in any temperate climate require very little heating or cooling. Spend 50k on insulation that will last the life of the building instead of 50k on heating and cooling devices which will need constant maintenance and replacement + fuel and end up costing 10x more over the life of the building. A modern house with modern insulation…

In the short term the math is usually bad. Can be a 20, 30, 40 year payback on insulation. For the builder? It’s almost for sure a loss unless he can play the green card. For any individual owner? They are likely to leave before they recoup a project like this. Appraisals on houses are price per square foot with a bedroom and bathroom modifier. Until people start pricing in energy efficiency in homes, say a price mul…

In northern Europe houses are insulated and have a rating. Cost to heat and electricity use are even standard part of a property listing and people do make it part of their total household cost calculation.

Re: Solar and batteries can power the world

#434
post #199

Earlier quoted context omitted.

The consumer rooftop solar cost is usually one of the most expensive ways you can generate electricity - often several times the cost of utility solar installations. The high rooftop solar price is usually hidden (at least in the USA) because no power source has been as subsidized as rooftop solar. Besides direct subsidies, wealthier home owners have often been paid the retail rate for the electricity they sell to th…

> Besides direct subsidies, wealthier home owners have often been paid the retail rate for the electricity they sell to the grid. This causes higher electricity bills for those in apartments and those who can't afford to put panels on their roof I don't think you thought this up yourself, so I won't blame you for it, as this exact, word for word swill is mindlessly repeated by a lot of people, so thats ample evidence…

You won't convince many people if you think ad hominem attacks and insults are acceptable. Yes, subsidies are done to help drive adoption. The key is that the subsidies should go where they can do the most good. Money is limited and is fungible - a dollar spent subsidizing utility solar will go much, much, further to decarbonizing the grid than a dollar spent subsidizing rooftop residential solar.

Re: Solar and batteries can power the world

#435

Earlier quoted context omitted.

Nuclear reactors make awful targets in a conflict, not sure having many around is generally a good idea if conflict is a risk and there are alternatives.

For many nations that is really not the primary reason to choose infrastructure. And even if that is your goal. Then building a 500MW reactor you can drop in the ground is likely a pretty decent solution.

Need to drop it really deep - which 500MW reactor is available for that?

Re: Solar and batteries can power the world

#437
post #382
post #355

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It has dramatically higher thermal heat demands in winter - far higher than is compensated for by that. Even if everyone switched to heat pumps.

True, but higher demand for heating in winter is not specific to Germany. In the end, Germany will likely need to import energy anyway - just as it does today. But this means this question may not be the most relevant.

Huh? It highlights the relevance. It’s easy to handwave ‘imports’ away - but import from whom, and how do they make the energy?

Re: Solar and batteries can power the world

#438

Earlier quoted context omitted.

The US and the rest of the West are capable of manufacturing. You just said yourself they can be made "anywhere" so make up your mind. What I think is that manufacturing is not competitive in the US or the West as a whole because of wage requirements and monetary exchange rates, and additionally because we operate a mostly free market and don't penalize foreign state-subsidized products hard enough to make domestic m…

There was a test on 30 year old panels and they only lost 20% capacity.

That is only marginally better in the scheme of things. They want to take farms for food out of commission in some places to replace with fragile and unreliable solar systems. Imagine installing this stuff on a large scale. If you plan to replace all the panels after 30 years and incur no losses from high winds, hail, vandals, etc., then you would need to overbuild the system by 20% at minimum. This is assuming modern panels are as durable as those old panels from the study too. 30 years ago, solar panels were built in the West and cost 10x as much as the ones we have now. So it seems reasonable to assume that brand new panels might not have the same characteristics, and be less durable. It would make a lot more sense to just put these panels on roofs and in parking lots where the real estate is already consumed, and the power can be a backup source instead of a grid-scale vulnerability.

Re: Solar and batteries can power the world

#439

Earlier quoted context omitted.

The French have used their nuclear system for 20+ years as a giving tree. The forced EDF to sell nuclear at very cheap prices to fossil fuel companies and then buy it back at much higher price. The French forced EDF to give subsides to solar even when that actually hurts their economics. The French randomly in the 2010s decided to replace nuclear in a short time-frame (completely 100% unrealistic) but it sounds good…

People disliking renewables always say this. Then when asked what method to price in the Swedish nuclear fleet having ~50% of capacity offline multiple times last year and France famously having 50% of the capacity offline during the energy crisis I always get crickets for answers. It’s apparently fine when nuclear plants doesn’t deliver, but not renewables. The difference with renewables is that it’s even easier to…

France has treated its nuclear fleet like literally shit. They have literally delayed maintenance because the government believed that they were just about to replace all nuclear with renewables. In addition to that, France has so much nuclear that they have become incredibly lax in operating their nuclear, they take ages to do basic shit most other countries do in just a few days. All of this is literally just related to the French government of the last 10-20 years not giving a shit about nuclear.

The reality is that in most western countries even 50+ year old nuclear plants often have an 80% uptime and usually are down at times when the capacity is not needed. If a government properly cares for their reactors, up-times of 90-95% are very possible.

Switzerland has a capacity factor of 90% with some of the oldest reactors in the world.

> The difference with renewables is that it’s even easier to manage. Their intermittency is entirely expected and the law of large numbers ensure we never have half the capacity offline due to technical issues at the same time.

The fact is that is overall much less available and much less flexible on when you do the generation and when you want more or less energy.

> Given that new built nuclear power costs 18-24 cents per kWh and won’t come online until the 2040s what you’re trying to tell me is that multiplying the current electricity cost 3-4x and creating a self made energy crisis isn’t so bad.

Nuclear is to slow is something renewable fans have been arguing since the 1970s.

The fact about cost is that on a system level its cheaper and France has been able to have cheaper energy then Germany for the last 50+ years.

Once you don't just look at generation but total cost, including all the cost of building out the grid, the cost is much higher. And if you ever want to be 100% renewable you better have weeks of battery at least, and that is a thing people barley calculate. Gas peakers plants will remain the solution for a very long time and when gas prices go up, it will cause an energy crisis.

In addition you will need to replace the wind energy far sooner.

In addition, with nuclear, a huge part of the cost is going to salaries of local highly educated people and technicians. You capture much more of the value in your own economy for the next 60+ years.

> Given that new built nuclear power costs 18-24 cents per kWh and won’t come online until the 2040s what you’re trying to tell me is that multiplying the current electricity cost 3-4x and creating a self made energy crisis isn’t so bad.

> Just look at the proposed EPR2 fleet. A 11 cent per kWh CFD and interest free loans. Summing up to over 20 cents per kWh for the electricity. With the first reactor coming online at the earliest in 2038.

The West has so totally and completely fucked the industry and did every possible thing wrong for the last 30 years. And now we are paying for it. This is what 30+ years of renewable orthodox has brought us, high energy prices and a complete collapse of the nuclear industry. France has dropped all its advanced reactor as well now we are building EPRs again. Its beyond sad.

What we could build are APR1400 units like in the UAE. If you do a proper build, yes it takes 10 year for the first to finish but after you start a new years 3 years later, and then another every year and then 2 each after that and later 3 each year. In 20 you can build pretty much as much capacity as you need and your learning curve is going to be amazing, likely you will finish a new build in less then 5 years at much lower cost. The problem is if you only look at 'when will the first reactor finish' instead of 'how fast can we build 20 reactors'.

Capital-recovery component for APR1400 alone works out to about 3.2–4.3 US¢/kWh at 5–7% financing, but this is for only 4 reactors built in with no background. But we should finance this with government bonds directly, so really capital alone is only 2 USc/kWh and less as build cost go down the learning curve. The fuel cost is also only 3-4 USc/kWh (hopefully we again have reliable European fuel and reduce the price further, another thing destroyed by the last 30 years). And operation and maintenance around 10USc/kWh isn't crazy for a proper fleet with centralized staff training and local industry.

As with everything in nuclear, one nation building 1 plant is going to be expensive and makes the numbers look worse then they are. And remember this was build in a country with no experience and no train workforce and only 4 reactors built, not the 10s of reactors people should build. A country like Poland could easily do a 20 year flash build program, and that would be much faster for them then Poland.

> The 10 GW HVDC links being built costs €20B. That’s equivalent to the subsidies needed for one new large scale reactor. Then you have the market price of electricity on top of that.

> Are you starting to realize the conundrum?

Try looking up total grid upgrade cost if you want to achieve 100% renewables. We are literally talking the same amount of money as all the generation combined. I heard interviews with people responsible for even only part of Germany where they admitted they will have to go to private markets to fund 100+ billion $ in investments. And these investors will want their money back. Total grid cost will be higher then to total cost of renewable installs. And of course wind turbines need to be rebuilt.

But I guess Germany is making it easier on itself by losing so much industry that they have fewer problems in the future for renewables to solve. Germany by the way since 2018 is spending 50 billion $ per year on direct energy subsidies. Yes that is partly heating but France because of its cheap electricity has far more heating converted to electric. So it is related to electricity policy.

What I want is rock solid energy that is reliable and served from a simple centralized grid, nuclear + 1-2h battery peak shaving with lithium or sodium batteries. Anything longer then that isn't great. Not some scheme where we somehow hope that the combination of Greek solar and Danish wind produce enough, and then trying produce hydrogen in Canada and ship it to Germany, or whatever other nonsense people want to come up with.

The current proto-market system has all the wrong intensives built in and we were much better of in a system where there was simply one centralized utility that made rational engineering choices about how to get cheap energy to everybody.

Not to mention that having a well functioning nuclear industry has lots of other advantages that 'buy solar panels from China' doesn't bring.

Re: Solar and batteries can power the world

#440

Earlier quoted context omitted.

There was a test on 30 year old panels and they only lost 20%.

We (literally, I know where some are) have 30 year old panels and 95 year old men, their existence doesn't negate an average. Also, PV panels are kinda non uniform in performance, long term studies show that one fifth of them perform 1.5 times worse than the rest. Either way, 20 year lifetimes where you build once and reap the rewards for 20 years is sufficient to put to rest the kind of argument being made about dep…

>Either way, 20 year lifetimes where you build once and reap the rewards for 20 years is sufficient to put to rest the kind of argument being made about dependancies.

It's not sufficient. We have had plenty of time to start making all of the critical things we import, and that never happened. In most cases, these things used to be made in the West in the first place. Just because you CAN make a thing doesn't mean it makes sense. The economics of solar would be totally different if you had to pay 5x more for solar panels to replace Chinese-subsidized slave-labor-backed imports.

There are other arguments to be made against mega-scale solar. Don't get me wrong, I love the idea of solar because it is on a small scale one of the best ways for an individual to get a bit of electricity without reliance on fuel supplies. But it has a lot of disadvantages at scale which make it unsuitable for many regions. Hail, snow, dust, vandals, and strategic vulnerability all make it look precarious. The supply chain concern is that much worse.

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