Solar panels are a great source of free electricity, but the vast majority of their customers do not understand the true purpose of home solar energy.
Now a good 100-watt solar panel costs about 6,500 rubles, the cheapest 100-watt panel costs about 5000 rubles (of course, I'm talking about panels with honest, not "Chinese" 100 W power). The main difference between an expensive panel and a cheap one is the dimensions (a cheap one with the same power will be almost one and a half times larger).
These panels give 100 watts of power only on a sunny day, when directed exactly perpendicular to the sunlight, without any obstructions (even window glass greatly reduces power).
On a cloudy day, and even in the absence of an exact direction to the sun, and even behind glass (for example, if the panel is leaned against window inside the apartment) the power drops drastically and it’s good if the panel can deliver 5 W (yes, yes, twenty times less denomination).
The efficiency of solar panels depends very much on the region where they are installed (more precisely, on the number of clear sunny days).
The experience of Viktor Borisov in the Moscow region showed that a 100-watt panel gives an average of 9-10 kWh per month in the summer, in late spring and early autumn 2-4 kWh per month, in late autumn and winter 0.3-1 kWh per month (one of Victor's articles here).
If you expect that solar panels will save on electricity, it is very easy to calculate that nothing will come of this idea and the panels will never pay off (I note that in addition to the cost the panels themselves, you need to add the cost of a solar controller and an inverter, and if you plan to use energy from the panels during power outages, then also the cost batteries).
At this point, most panel buyers are disappointed, and the thing is that they do not understand their main secret. Here he is:
Solar panels in everyday life are not needed in order to save electricity. They are needed where there is simply no electricity.
Now, when no one knows in what conditions we will live in a month or a year, the ability to get electricity "out of thin air" can be very useful. No one imagined that big cities could be left without electricity for a long time and those who had solar panels could survive the trouble a little easier. A small 30-watt panel will allow you to charge your phone (if, of course, cellular communication is working) and power bank, organize local lighting. A pair of 100-watt panels, a controller, an inverter and a battery will allow you to use a small refrigerator, lighting, and some low-power electrical appliances.
When the military operation began, just in case, I bought a couple of nice panels and a simple Chinese controller.
I hope they never come in handy for survival, but so be it.
It will be necessary to experiment with them on the subject of working behind glass in a vertical position in various weather.
Peace for everyone!
© 2022, Alexey Nadezhin
For twelve years I have been writing about technology, discounts, interesting places and events. Read my blog site ammo1.ru, in Learn, Zen, Mirtesen, Telegram.
My projects:
lamptest.ru. I test LED lamps and help you figure out which ones are good and which are not so good.
Elerus.ru. I collect information about domestic electronic devices for personal use and share it.
You can contact me in the Telegram group @ammochat.
#solar panels#solar panels