If you own a house in Australia setting up a solar energy system to produce some of your own energy is a effective solution to deal with the increasing electricity bill. In most of Australian area like city, brisbane, adeliade sunshine is the easist resource to use. There are some useful tips you may interested in before install your solar power system. It is likely that you have a large, sun facing window affair that has some kind oftransparent won’t make very much, but as the sun rises in the sky, power pro- duct on will increase and eventually hit its maximum capability, until the sun has crossed the sky and begins to set again, then whole thing starts all over again.
Do not forget insulating material for glass, in that window.There are good materials out there that will insulate betterthan one sheet of plas- tic or glass, but they are very pricey. Even with the good stuff. there needs to be a way to isolate it from the rest of the house at night during the winter, because the losses are tremendous, yes even with the good stuff…” And that is the problem I never could overcome.
To state it more simply any Sydney solar energy is going to need a large surface area to collect sunshine to heat something up. The large surface area is going to work against you when it gets cold outside. The surface area required, is the problem. In mathematical terms. heat transfer through any material can be written as the simple formula: Heat transferred = U x A x (tem- perature difference).
There “U” is an expression for the characteristics of the material, something like an”R”value used in insulation for example. “A”is the surface area. Of course the temperature difference means how hot or cold one side is compared to the other. You can see from the simple math that the heat transfer (heat loss) through any glazing material goes up dramatically as the temperature dif- ference from one side to the other increases. When you try to keep it warm inside when it is very cold outside, you get that large temperature differential.
When you build up a large surface area device of some kind to cap- ture solar radiation, it may work great in the summer when you are testing it and you get 120 degree air out of it. But you have to remember; 120 degree air is only about, 30- -10 degrees hotter than the summer outdoorair is You’re not going to get better per- formance out of it in the winter. that is, the air coming out will still be 30 – 40 degrees warmerthan the surrounding air is. In the winter when the air temperature is dow’1 to say. about 20 de- grees, 50 or 60 degree air coming out of the collector doesn’t do you a lot of good.
That’s why I have come around to going photovoltaic. It is immune to the cold weather. The panels actually work a little bit bet- ter when it gets real cold. There is the argument that photo cells are only about 15% efﬁcient an-:l s:-lartherrral can be much higher. That’s true, but that argument falls apart when the perfor- mance drops because it’s so cold outside. lf you’re trying to heat your hot water in the summertime, go for solar thermal. If you want to heat your house during the winter, don’t try solar thermal. That’s my adv ce.
Grid tie without Net metering?
When we have rrentic-ned the use ofone ofthese grid tie type in- verters, it is assumed or inferred that we are goingto be gettirg on the net metering register with the power company. The question is, do you have to do that? Another question is do you want to do that? And of course the last question is. Should you do that? …… ..or not.
The truth is that modern grid tie ecui pment will actually function well on its own, if everytwing is installed properly, “without net metering. There is nothing te:’mical that needs to be done to your house wiri 1g to get one ofthese to work properly. With all ofthe interest in net metering lately by tl”e power companies, where they are trying to ﬁnd creative ways to charge people more and more for using solar power. it might be good to know the advantages and disadvantages of net metering. The one huge advantage i see isthat if you are signed up for that, you really can bank enough credits to get your electric costs down to almost nothing if you have a large enough system. in other words, if you produce a signiﬁcant excess of power during the day, you can use the credits to offset what you use at night or on badly overcast days. Life is simple and things are good.
The caveat here is perhaps your power company won’t let you grid tie a large enough system. You can easily choose quality solar panels or products by check Australia solar panel wholesale if necessary.You’ll have to check that out locally. There is really that much bad stuff that can be said about it though, except forthe bureaucratic red tape you need to get through to do it. There is also the tax credit issues you might be able to cash in on as well.
You may find out more solar energy information here.