He told me, is it possible to make a country house completely autonomous?

A lot of private sector residents and gardeners dream of energy autonomy. This is especially true of electricity - I want to be less dependent on power outages. If your house is heated solely by electricity, you perfectly understand the price of such "dependence" on the local RES ..

So how do you achieve the autonomy of your home? Modern technology offers at least three solutions to the problem:

• an electric wind generator based on a wind turbine;
• solar panels (panels);
• solar collector (vacuum, liquid or air).

The circle of suspects is outlined, let's look at each candidate for the role of an alternative energy supplier for your home.

1. Wind generator

The official name is a wind power plant.

A seemingly simple rotor-stator device that converts mechanical energy into electrical energy. The cost of the simplest 500 W horizontal axial apparatus is 37 000 rubles.

If we take the national average cost of a kilowatt of electricity, it turns out that for payback, a wind generator must produce 9,250 kW of electricity (or work 18,500 hours at full power - 770 full days, two years).

However, according to the experience of people who put wind generators on their site, the generator does not have time to live up to the payback point. There are three reasons: the first - there is little wind on the site, the second - because of the noise of 90 dB, the neighbors demand to remove the turbine, sometimes they shoot at it with guns. The third - the generator breaks down after 1.5-2 years of operation.

This means that the wind generator and autonomy are fairy tales for the rich.

2. Solar panels.

It would seem that the sun should provide enough energy. At least for the operation of the refrigerator, a couple of pumps and, if you're lucky, a water heater.

However, take a look at the table of sunny days in Moscow (Sept-Feb) and understand: in all regions north of the southern coast of Crimea, solar panels will never pay off. In Siberia, the payback period is ~ 100 years.

3. Air solar collector

But this is the only alternative energy option that pays for itself in 2-3 years. Roughly speaking, an air (I emphasize) air solar collector is a sealed box made of DSP, OSB or plywood, the back wall of which is insulated with foil. On top of the insulation, a sheet of corrugated board is attached, painted in matte black. The front panel is sheathed with glass or polycarbonate, air intake and supply are made from the ends.

Also, instead of a profiled sheet, corrugated pipes or aluminum cans painted in black are often used.

A conventional duct fan and a thermal relay with a remote sensor are installed inside the collector. When the air temperature in the collector reaches 70-75 degrees (40-50 minutes in clean sun), the fan begins to draw in warm air and supply it to the room.

By the way, even at negative temperatures, the air in the collector heats up to 75 degrees in just 40-50 minutes.

Conclusions:

So far, we cannot rely on alternative energy entirely. The only AUXILIARY heating option that will pay off in a year or two is an air (not vacuum) solar collector.

I would be glad to receive your comments!