Which era you live in? This year, cost per unit of Solar was comparable to that of crude. And wind was cheaper for the very start of it.
Ok lets talk of Solar energy then for your Home. You have 5Killowatt Max demand and your house run on 230v. So for the Green Energy you installed Solar Panel.
Crystalline panels are the most common type of PV panel. The technology has been around for about 50 years and was first developed for powering satellites. They are capable of being up to 20% efficient. Most of these technologies are highly reliable (25 year warranties are common) and produce similar results in terms of output efficiency. The primary downsides of using crystalline are that they can be bulky, expensive, prone to damage, are rigid and require a lot of labor to install. That said, they are often the best choice for a residential solar energy system. They come in two varieties: monocrystalline and polycrystalline.
Monocrystalline silicon panels are made up of single-crystal wafer cells cut from continuous, cylindrical crystal ingots. They can be cut completely circular to minimize waste, but they are often trimmed into other, more square-like shapes (see below). Since each is made from a single crystal, the cells have a uniform, deep blue color. They are the most efficient units available today (they produce more power per square foot), but they cost more than other types.
Polycrystalline silicon panels are made of multi-crystal wafer cells cut from square ingots that are created by pouring molten silicon into a mold. This way they can be cut into square wafers to minimize waste. Each is made up of random crystal formations which make it various colors of blue (below). They are slightly less energy efficient, but also cheaper than monocrystalline.
Thin film modules are very inexpensive, but also quite inefficient (require more area per watt produced). Their efficiency is 10% or less and their long-term durability is often questioned. They are less expensive because they require less of the active material to function (below). In fact, they can be made microscopically thin, flexible and light weight and are deposited on a sheet of glass or metal instead of having to grow ingots and slice wafers. Cadmium telluride (CdTe) is the most cost effective thin film technology. Amorphous silicon is a material used to create panels that can be molded to the shape of almost any surface. Most of the research and development of solar cells is currently being focused on thin film technologies.
Building integrated photovoltaic (BIPV) panels look like an integral part of a roof since they are the same size and shape as shingles (below). They have lower efficiency and are more expensive than other panel types. They are most effective on large roofs in very sunny areas.
As per resources from the solar PV industry, cost of a PV module (just the panel) costs anywhere between Rs 30 to Rs 60 per watt of power generated (depending on the quantity you are buying). A good imported module will cost around Rs 40-45 per watt (for bulk transactions, not for retail). Good ones manufactured in India would come as low as Rs 30-32 per watt (for bulk transactions, not for retail). Please note that this is the cost for the panel and in case you are looking for inverter and batteries, the cost would be additional. A good 5 kW system for a
home would cost around Rs 5-7 lakhs to setup (at retail price of around Rs 50-60 per Wp) , which can provide electricity for 25 years. The additional operating cost will include the cost of replacing the batteries.
So for 5 kwatt you would required 5-7 Lakhs for the setup of the Panel but at night you need batteries for storage also, to sustain 5kw max load, for 10 hour you need 5 X 1000 X 10 = 50000 / 12volt = Aprox 5000 Ampere Hour battery Bank. One battery of 150 Amp hour cost is approx Rs 10,000 so for 5000 Amp hour you need 5000/150 * 10000 Rupees, and the life of the Battery is approx 2 years.
You need charger for charging the batteries, and since battery stores the energy in the form of DC direct current, you need a circuit to convert it into AC Sinucidal energy because most of the motors, fans in your house works on AC. Conversion have loses, so lot of things would depend on the efficiency of the circuit, regulators and batteries.
Problem with batteries are they have Lead, which is harmful and creates pollution.
Do the Maths.
I have a question .
Current levels
Nitrogen = 78 %
Oxygen = 20
Carbon Dioxide = 0.04
We all know , That increase in percentage of Carbon Dioxide will adversely affect the Planet .
But what will happen , If levels of Oxygen and Nitrogen Changes .
Example:
Oxygen = 30-40 %
Nitrogen = 60-70 %
@Nilgiri @zebra7 @Providence @Godman
We are adapted to the composition of the gases you mentioned first. Adaptation takes lot of time, and all gases are necessary. Even Green Gases are important to sustain the heat, otherwise the temp. of the earth will drop considerably which would be dangerous. Increase in oxygen even few percentage will cause you headache in you head, I have smelled pure oxygen once.
