[Revi]

The case for the status quo is better than the case for alternatives assuming the world stays the same and you can keep buying electricity at the same price, and the dollar doesn't tank. If either of these happens it makes sense to put solar on your house now. Your dollar is still worth a little. Anything you do now cuts your bills in the future when the dollar may be worth less. The problem is financing. It should be as easy to buy a solar hot water system as it is to finance a hot tub. It'll become easier. It has to.

[Bandage]

If we put the Energizer Bunny in a hamster wheel and connect the hub to a shaft and gear system, we may be able to operate an electrical generator indefinitely.

[lonewolf]

redacted

[Mesuge]

Lonewolf, good point! The issue with renewables is that you have to service them regularly or at least care for them it's a different philosophy from the 'grid & switch 24/7' mentality..

- For instance for diy wind turbine is necessary to have some spare parts mainly from the mechanical department.. On the other hand wooden blades are recyclable and steel rod, rotors/stators/magnets etc. are durable items if made properly.. You can build yourself a diy wooden and durable windmills 500-3kW. There's a great step by step book and community around it on the web..

- In terms of solar I'd be worried about frost snowfall in storm and other element impacts. But generally, the output longevity should be much more than the 25yrs guranteed by manuf.. Another issue is the lead acid battery bank which might not be replaced easily in 15 yrs. if the situation gets bad.. If you have the money there are solutions to go off grid with vanadium fuel cell battery storage with cca +15.000 deep discharges (human life). 5kW system goes for $14k and is scalable up by increasing positive and negative ions storage tanks..

- Check out the solar cookers stuff. I didn't believe it first but gave it a try this past summer and it's fantastic for preserving fruits for winter, baking bread and meat, spagheti, pasteurizing water etc.. And get a big one if you live in the North, winter sun provides less photon juice for cooking..

- Hydro is cool, there are nowadays smart microhydro plants based on application of new hydrodynamic science which give you a lot of kWhs for a few grants even in a small creek.

Generally, one have to evaluate the best renewable for its particular location. The less tech involved the higher probability it will last longer with less maintanance..

Anoter important thing is that distributed renewables might force people to get back in sync with the nature cycle. For instance you can use peak power only when the sun shines or the wind blows or the creek is not dry.. This renders the contemporary work day of commuting and slaving inside cubicle quite unrealistic to continue.. In the world of renewables you telework (if internet/LAN is still around), delay major energy suckers for peak power window which date is not certain etc.. Back to nature..

My worry is that if the SHTF these true low tech miracle gadgets get stolen/damaged quite fast by the white/blue collar zombies invading villages..

[Curmudgicus]

A book you might want to look at is "How Buildings Learn" by Stewart Brand.

Different systems in a building age at different rates and require updating or replacement at different intervals. If you go for a solar panel system with Outback controllers, do it in the full knowledge that this technology is going to make giant strides in the near future and will require updating. Don't install it in such a way that you can't get at it and work on it easily.

High tech has its place. So does "brute force." If you build a building with a lot of mass that is thermally coupled to the earth ten to fifteen feet below grade and that is well insulated, any energy load that a high tech system is going to have to meet is reduced to a level that can be met. The key factor first and foremost is REDUCE THE LOAD. If you do that the options multiply.

[Revi]

The key factor first and foremost is REDUCE THE LOAD. If you do that the options multiply. Curmudgicus

I agree! If we all used 1/4 of what we're using now, lived in passive solar houses dug into south facing hillsides, used led lights powered by solar, washed with solar heated water and heated with less than 1/2 cord of wood we could live sustainably around here. We might even have enough extra so that we could take our electric vehicle for a spin.

We're not quite at that level yet, but we could be pretty soon. It all exists now. Why not? Reality is agreed perception. We're suffering from an imagination shortage as much as an energy shortage.

[SolarDave]

$this->bbcode_second_pass_quote('Revi', 'T')he key factor first and foremost is REDUCE THE LOAD. If you do that the options multiply. Curmudgicus

I agree! If we all used 1/4 of what we're using now, lived in passive solar houses dug into south facing hillsides, used led lights powered by solar, washed with solar heated water and heated with less than 1/2 cord of wood we could live sustainably around here. We might even have enough extra so that we could take our electric vehicle for a spin.

We're not quite at that level yet, but we could be pretty soon. It all exists now. Why not? Reality is agreed perception. We're suffering from an imagination shortage as much as an energy shortage.

[Tanada]

$this->bbcode_second_pass_quote('Revi', 'T')he key factor first and foremost is REDUCE THE LOAD. If you do that the options multiply. Curmudgicus

I agree! If we all used 1/4 of what we're using now, lived in passive solar houses dug into south facing hillsides, used led lights powered by solar, washed with solar heated water and heated with less than 1/2 cord of wood we could live sustainably around here. We might even have enough extra so that we could take our electric vehicle for a spin.

We're not quite at that level yet, but we could be pretty soon. It all exists now. Why not? Reality is agreed perception. We're suffering from an imagination shortage as much as an energy shortage.

[Ludi]

$this->bbcode_second_pass_quote('Tanada', 'Y')ou want solar electricity? Thats fine, how long does it take for them to pay off in terms of energy produced vs energy required to build them, and in economic terms how long till they pay for themselves?

[Doly]

$this->bbcode_second_pass_quote('Tanada', '
')I would love to live in a passive solar house on a south facing hillside, however my lot in the city is 35 feet by 65 feet. Not a lot of room to dump a hill of dirt and earth shelter a house.

[Tanada]

$this->bbcode_second_pass_quote('Ludi', '')$this->bbcode_second_pass_quote('Tanada', 'Y')ou want solar electricity? Thats fine, how long does it take for them to pay off in terms of energy produced vs energy required to build them, and in economic terms how long till they pay for themselves?

[Ludi]

I think there is much about our cities which is inherently unsustainable and needs to be changed gradually. There is quite a bit of literature about appropriate housing design, which does not need to involve widely spaced housing. Densely packed areas of highrises probably can't be maintained in the long run, however.

[Tanada]

$this->bbcode_second_pass_quote('Doly', '')$this->bbcode_second_pass_quote('Tanada', '
')I would love to live in a passive solar house on a south facing hillside, however my lot in the city is 35 feet by 65 feet. Not a lot of room to dump a hill of dirt and earth shelter a house.

[Revi]

The nine questions you should ask about alternative energy for yourself are:

1) Can you do it at all? There are solar backpacks that charge a laptop.

2) Can you afford to do it? You can start small.

3) Do you know anything about it? The web has lots of info, but is it useful?

4) Who can help you? Lots of people know a lot about this stuff.

5) Does it make sense? Maybe you don't need to spend $20,000 to produce the same electricity you use now for $30 a month, but you can start to diversify your energy supply.

6) How do I start to do something? Get the Real Goods Catalog. Think.

7) Where do they sell this stuff? Lots on the internet, but hard to visualize things with information just on the net.

What is a certified solar installer? Lots around. Some will help you install yourself. It's a great way to do it!

9) If you have figured out all the other questions, Why not do something?

[Dezakin]

$this->bbcode_second_pass_quote('', '"')Considering that solar panels typically have useful lives of 20 years or more, the electric energy recovery will range from 400% (in the case of a 5 year energy payback) to 2000% (in the case of a 1 year energy payback).

[chris-h]

1)does it produce electicity , fuel or heating ?
2)is it available today ?
3)how fast can it scale ?
4) is it acceptable from an enviromental view or is it a case of nimby
does it require a lot of land ? does it degrade the value of land near the point of generation ?
5)can you produce it everywhere ?
6) does it require a limited resourse ? like platinum for example ?
7) can it use our current infrastucture or does it require a new one ?
can it be produced locally ?
9) does the use of such a technology labels you as poor or phyco or as a fashion victim?
10) eroi
11) cost

[deconstructionist]

$this->bbcode_second_pass_quote('Ludi', 'I') think there is much about our cities which is inherently unsustainable and needs to be changed gradually. There is quite a bit of literature about appropriate housing design, which does not need to involve widely spaced housing. Densely packed areas of highrises probably can't be maintained in the long run, however.

[Revi]

Deconstructionist's idea sounds great! Those Forbes park lofts solve a multitude of problems that people have now. You can use a smart car whenever you want, so you don't have to own or maintain a vehicle, they re-use existing industrial space, so it isn't like living in some schlock condo. They are near everything that's happening and mass transit. What's not to like? This is the housing of the 21st century, not the last century. I am glad to hear that somebody gets it. Maybe they've been reading Kunstler!

[Speed]

After a short 150 years we now know fossil fuels cannot and will not continue to be the global energy standard. So we might as well ask a list of questions that could lead us to the energy choices for the future.

This is the beginning of the list:

1. Energy density (oil is densest)
2. Build cost/MW
3. Surface area/MW
4. Lifecycle costs
5. Total emissions (including heat)
6. Safety of operation (obviously nuclear is first here)
7. Number of energy conversions
8. Cost of energy infrastructure ($10 trillion replacement cost for current global fossil fuel system)
9. Overall energy conversion (roughly 30% for current fossil fuel system)

Maybe you can add to this list.

Speed