Alternative (solar) energy sources find more and more broad application in various spheres. It is connected with falling of the solar batteries' cost at 30-40 times for the last 20 years and continuing of decreasing that does its usage very profitable. Alternative sources of the electric power became already even cheaper than traditional ones. At February 2018, the cost of 1W energy produced by solar batteries was $0.42 against $3:49 at 2008 [1].  Base part of any solar system is Photo-Electric Converter (PEC). The main problem for usage of solar installations is the low density and inconstancy of a solar radiation stream as well as low coefficient of solar radiation transformation into electric energy by silicon photoelectric modules (15’20 %) [2]. The topical direction is search of ways for improvement of PEC parameters, in particular – elevating its power characteristics without at the same time increasing in the area of reception surface. To improve indicators of photoelectric installations is possible by formation of plasmonic functional nanocoatings on accepting surface of photoelectric elements [3, 4]. The best results of solar light absorption in visible range of spectrum could be reached when thickness of plasmonic parts will in order of tens nm and its flat dimensions is about ten times more.  As object of the experiment, the industrial PS-250 photoelectric panel with polysilicon photocells have been chosen. The installation has been equipped by original flat concentrator [5]. There are many methods for formation of plasmonic films. Among them, colloidal techniques that allow fabricating of nanostructures of different geometry and size over large area surfaces and are most attractive due to time- and cost efficiency compared to others. In this work, the nanoparticles of silver have been obtained by pulse spark dispergating and electrophoretically fixed on substrate.  The coating formed by electrophoresis immediate represents nanoparticles with dimensions belonging mainly to the range of 10’70 nanometers fixed on a PEC surface and quite evenly distributed on the substrate. After aging in colloidal solution, the silver nanoparticles form surface clusters (agglomerates) on substrate with average sizes of 200’500 nanometers. The obtained film completely correspond with points of plasmonic nanostructures theory.  Testifying of treated photoelectric converters at solar illumination about 950 W/sq.m show that nanocoating are capable to increase power characteristics of 20%. Besides, even in case of lateral sunlight falls onto working surface, the power characteristics of photo converters are close to theoretical values, unlike solar elements without coating. They do not reduce electricity productivity at changing of setting angles in comparison with theoretical value. Even at lateral sunlight falls on the working surface, the power characteristics of PEC will be stable. Thus, for photovoltaics installations with nanocoating elements, unlike the conventional modules, the tracking systems are not required what leads to simplifying of its construction and reducing the total costs.