Solar Photovoltaic Systems – Your Questions and Answers

admin answers:

Use the names of all the towns near you before your best keyword.

Start a wordpress blog and write to it several times a week.

Always use these keywords and provide great content.

admin answers:

As the other person told you it all depends on how much electricity you use not how large the house is. I have a cabin which I have a solar system on which is very small and home made–up and running for under $750. BUT–it powers very little, just my computer, fan, lights and water pump.

If you want a “full power house” with everything a ‘usual house’ has then you won’t have enough space on your roof to power everything.

Best bet, figure out what you need and how much electricity it uses then you can go from there. Until you have a budget on how many KWh you need there is no way to get the $$$’s.

admin answers:

Unfortunately, if the relationship you have with your bank is not sufficient to enable them to loan you the money, you aren’t going to get nearly as warm a welcome from another bank. So, banks are pretty much out of the question.

For that amount of money, you *might* be able to max out credit cards… If you have enough credit cards.

A “payday” loan is out of the question, as you are talking about 1500 GBP max… And they expect to be paid back quicker than a month and a half.

So… It looks like you are stuck with finding a financial backer. Either a Venture Capitalist looking for a quick return on their investment, or family members who wouldn’t mind a bit of profit. And this is what you must realize… That since YOU don’t have the money to finance your operation, anyone you go to, to get the money *IS* going to expect to make a profit from you using their money.

So, first accept the fact that *YOU* are not going to see the estimated profit of 2200 GBP. You might get lucky with the right backer, and you might see half of that. Get that into your head. Accept it. Now, with that fact engraved in stone, start hitting up all your relatives, and friends of relatives. You are offering a return of 1100 GBP on a loan of 8700 GBP over 6 weeks. That’s roughly 13% interest…. Over a month and a half. That’s almost putting you in the Loanshark category…. Er.. Being able to go to a loanshark.

That’s about your best bet, considering your financial situation.

End of line

admin answers:

I guess the Solar Power would be, but as for the cost no one knows exactly & i guess that the cost would change from a place to another, depending on the installations.
Good luck.

admin answers:

Hey Yoyo, Roderick and MTR are both correct on this one, but I’m not sure it gets to the heart of your question. You can concentrate photons onto any type of photovoltiac device and it will not increase it’s efficiency one bit, but it will increase it’s power output. It is like putting a larger fire under a water heater tank. It still has the same efficiency, but is getting much more heat. In the end, that small tank will probably burst. Multijunction panels are more efficient, that is, they convert more of the incoming energy to electricity by using many thin layers on top of each other, each one grabbing a slightly different wavelength of the incoming light. The real problem is as Roderick says, getting rid of the heat. The reason multijunction cell builders were experimenting with concentraters was because their devices were so much more costly per unit electricity produced, they were trying to find a way to make it pay off. You don’t see them around for the same reason the single junction concentrators are not around today, they all burned out just a few years after they were put into service. Multijunction cells are very promising in space where heat is not the issue, and where space is limited by the size of the craft, or space station. In your yard or on your roof, none of this matters much.

Getting back to heat, some concentrators that were tested had cooling systems attached to wick off the extra heat, and then throw it out into the trash. Well if you’ve gone to such lengths to pile solar heat up in one place and it’s causing a problem, it makes more sense to find a use for it. Hence today the Germans are putting their weight behind the North African Solar Project. If you google that exact phrase, you’ll find some articles on what is happening, and by using the google images selection, some great pics. What they are planning on doing is concentrating sun to an air to oil heat exchanger, and heat oil to 600 degrees, then store it. The plant then uses the super heated oil to run through a oil to water heat exchanger to boil water and run a steam turbine. The throttle for the turbine is controlled by the steam output, and the steam pressure by the amount of oil introduced. In this way, we can take advantage of all the incoming wavelengths the sun has to offer and use the heat to our advantage, and additionally, store the hot oil for use at night, when the sun is not shining. Now there is an idea, a thermal battery. The project will eventually run all of Europe on the sun that is falling on a small corner of the Sahara Desert, minimally impacting wildlife, and in a location where nobody will have to look at it.

Multi junction cells are an interesting technonolgy, and may be commonplace one day, but not concentrated photovoltiacs, regardless of how many junctions they have, because they all have the same issue, too much heat. Maybe they could use them in the artic someplace. Take care Yoyo, Rudydoo

admin answers:

Liberals are all about “feeling” good about what you do rather than doing good. In that light, I have been walking to work for the last year. I’m saving up enough credits to buy Al Gore. I’m going to have him carry me to work!